50kW Combi Boiler / Combination boilers

50kW Combi boiler or Combination boiler – gas fired – from Flexiheat UK

Our Flexiheat 50kW combi boiler is a well-designed condensing combination boiler with 97% efficiency, making it an “A” rated boiler for heating and hot water. This efficiency allows it to generate enough heat to meet your home’s demand while using less fuel than an older, inefficient boiler. The boiler installation is easy, and we can supply this high performance 50kW gas combi boiler in either natural gas (mains gas) or LPG (propane gas), which is ideally suited to larger homes with high demand and more than one bathroom or even multiple bathrooms, i.e., two or more bathrooms.

Gas combi boilers are a one-of-a-kind, compact, and cost-effective solution that are ideal for houses with limited space. They combine a water heater and a central heating boiler into a single device, eliminating the need for additional water cylinders, immersion heaters, or tanks in your large homes that you require with a system boiler and reducing installation costs.

Boilers account for approximately 60% of a household’s yearly energy costs for domestic use, and they have an enormous impact on fuel bills. With more seasoned older gas boilers, a significant amount of heat that could be used to produce hot water is wasted, making them increasingly expensive to run.

Our 50kW combi gas boiler is more than 97% efficient, so 97p of each £1 you spend on your energy bills for your boiler is utilized. When using an Opentherm internet-connected smart controller, you can control our ERP “A”-rated high performance gas boiler on the go from your mobile, or tablet—the right choice for people with busy lives in large homes and even commercial heating and hot water applications.

Our 50kw combi gas boiler has a ErP “A” rated efficiency rating for both heating and hot water demands, this powerful wall hung boiler is an efficient and reliable combi gas boiler, that can comfortably heat large homes, providing effortless comfort at a reduced running cost. All while you sit comfortably in complete peace of mind, knowing that you have a highly efficient 50kw combi gas boiler, that is also one of the quietest boilers in its class at 52 decibels noise level installed (for comparison, a refrigerator is around 50 decibels noise level).

The best features of our condensing 50kw combi boilers / combination boiler are:

• Higher kW boiler: compared to the competition, we actually make a 50kW combi gas boiler that will produce 53.85 kW output of heating power based on a 50C/30C flow and return system, or 49.19 kW output rating at 80C/60C.

• The central heating boiler side of this high efficiency powerful combi boiler can be used on an underfloor or radiator heating system. This makes this combi boiler great for large properties; we talk more about this application here – Combi boiler for a large house

• Modern new design: this gas boiler benefits from aesthetically pleasing looks. With its modern design, and quieter operation with a reduced noise level, it is one of the quietest boilers on the market, with a reduced lift weight compared to the competition.

• Increased burner modulation ratio of 1:10, which prevents on/off cycling for a lengthy product life for your new boiler and reduces noise level for the user.

• It’s inbuilt intuitive controller, which benefits from an intuitive menu structure for all the information required for control, commissioning, and fault finding if so required of the heating system, which means no need to search through manuals for fault codes. Resulting in the rapid diagnosis of any issues. Not that you’ll use the fault finding much with our quality range of efficient 50kw gas fired combination boilers.

• Servicing: With plenty of room within the appliance casing for easy internal access, this 50kW combi gas boiler is an installer’s dream to work on, with pipe connections at the bottom of the boiler and fixing points at the rear of the boiler. Also a benefit for rapid diagnosis and fault finding.

• Installation of the gas boiler, which must be done by gas safe qualified installers or company – can be in any location, as we offer various flue options, such as a room-sealed range (see details below). Also, being one of the quietest boilers, you’ll have complete peace wherever you locate the boiler.

• Can be operated on a system with an with an optimum pressure of 0.3 to 3 bars for the heating side and 0.5 to 6 bars for the domestic hot water side of the appliance.

• This 50kW combi gas boiler is suitable for natural gas (mains gas) or LPG (must be specified at the date of customer order). Sit comfortably, knowing that if you change your gas type, these combi boilers are easily converted over with minimal installation costs.

• Provide hot water. The DHW flow rate at a 35 Degrees C temperature rise is a high flow rate of 20.30 litres/min DHW output, or at a 40 Degrees C rise then its 17.5 litres/min flow rate, which is still a high flow rate even in the deepest of the worst winter conditions, which many properties will never endure. The temperature is easily changed with our intuitive menu structure in the in-built control panel.

Central heating system side of the boiler

Central heating output rating: based on flow and return temperatures of 80/60 and the fact that current new build homes have radiators that have an average of 1.5 kw output. Our 50kW gas combi boiler has the capacity to generate 53.85 kW of heating output power, sufficient to heat up to 35 radiators on the system, effectively serving as commercial heating. Please note that if you are retrofitting, the total number of radiators cannot exceed the boiler’s heating output rating of 53.85 kW.

Some of our competitors claim a 50 kW combi boiler combi, but in reality, the heating side of the boiler has only 35 kW of output.

There are not many companies producing a gas fired 50 kW combination boiler. Some people may regard a boiler produced by the Worcester Bosch company, namely the Worcester greenstar 8000 50kw combi boiler range, as a direct competitor to our boiler, but in reality, this boiler and all the information we can find, will only produce:

Central heating output (kW): 33.8 kW at 80/60 °C or 50/30 °C condensing mode: 35.7 kW

While our gas boiler will produce 49.19 kW of heating power at 80/60 °C or at 50/30°C in condensing mode it will produce 53.85 kW at maximum capacity.

Thus, can you really call the worcester bosch greenstar 8000 a 50 kW combi?? You make the final decision, but it seems a bit short to us?

Domestic hot water performance (DHW) –

The Worcester greenstar 8000 is 48.9 kW rated on the dhw side, the output is –

DHW output at the hot tap (35°C temperature rise) – 20.3 l/min hot water flow

DHW output at the hot tap (40°C temperature rise) – 18 l/min hot water flow

With a plus or minus of 15%  quoted ?? umm 

Whilst our 50 kw combi boiler boiler will produce the following outputs for domestic hot water

DHW output at the hot tap (35°C temperature rise) – 20  l/min hot water flow

DHW output at the hot tap  (40°C temperature rise) – 17.5 l/min hot water flow

There’s no plus or minus 15% for our data – we will produce those figures quoted above

and this should be more than adequate for more than one bathroom.

Domestic hot water performance of the combi

Main features – Due to its excellent domestic hot water flow rate, with a temperature rise of 30 degrees C @ 23.40 ltrs/min of hot water flow or with a temperature rise of 35 degrees C @ 20 litres /min of hot water, this 50kW combi gas boiler is ideal for a two-bathroom house. Our next size down our 34kW combi boiler will do 16 litres /min just to compare the performance.

Hot water cylinder

As no domestic hot water cylinder is used with a combination boiler, unlike system boilers, you are lowering your carbon footprint and energy fuel consumption for your domestic hot water usage, as gas is only consumed in this ERP A rated efficient combi boiler when hot water is required – it’s one of the key features – your only heating hot water when you require it – which results in lower energy bills / gas bills.

Should your cold mains not have enough flow rate to adequately provide for your hot water needs then a system boiler, which uses a separate hot water cylinder for storing water for larger volume applications or heat only gas boiler (also are also called a conventional, regular boiler or traditional boiler), then please see our webpage here – 50kW Boiler which can be used in a multi boiler cascade system for even larger outputs.

Heat exchanger style / construction

This powerful wall hung boiler is equipped with a stainless-steel exchanger with a large Ø 28mm monotube coils, which not only benefits from very low pressure drops, but guarantees lower risk of clogging, with greater thermal efficiency, and greater ease of cleaning with lower running costs. We guarantee or warranty period the heating water heat exchanger for 10 years, when a good quality magnetic dirt and air separator is fitted to the heating system, and the boiler is serviced annually.

Technical data of our combi boiler – 50kW

50kw gas combi – central heating output / hydronic heating – ErP  “A” energy efficiency rating – energy savings trust approved with high energy efficiency.

Energy efficient domestic hot water “A rated” ErP energy efficiency rating  – DHW flow rate at various temperature rises 

mains gas and propane gas and electrical requirements for the combination boiler

Download the 50kW Combi Boiler Manual Flexiheat UK

Boiler Flue Options / Spares

We do various flue options / accessories, the most common is a co-axial, which takes the combustion air from outside, and the combustion gases from the device to the outside – making these combi units room sealed when used.

The most common flue kit is our horizontal co-axial kit – both of these can be used up to 10 metres in length

Horizontal kit from Flexiheat UK

Or the vertical option

Vertical kit from Flexiheat UK

Both of these accessories can be used up to 10 metres maximum vertical flue length, losing 0.8 metres off the length for every 90° elbow used, and 0.5 metres for every 45° elbow used from the overall maximum vertical flue distance.

Or by using a split system, we can achieve routes of up to 60 metres of maximum vertical flue length.

Split pipe system from Flexiheat UK

Boiler controls

With an easy-to-use display with an intuitive menu structure and greater connectivity with any Opentherm compatible controller, our 50kw combination boiler is made to suit your lifestyle, as well as your home.

One of the new features of OpenTherm – (which is a standard communication system that connects natural gas, lpg gas, oil or even electric boilers with room thermostats). This means that your combi boiler can be used with any OpenTherm compatible thermostats or controllers – the best-known brand on the UK market to date is between Nest or Hive which are , but we also provide a solution from stock, which has extended range, and key features such as the ability to control your boiler from a mobile phone, pad or your computer with wireless connectivity.

This means if your away on from home, you can have controllers that will activate your energy efficient 50kw combi gas boiler based on your postcode location in relation to your property – so it’s nice and warm when you get in or should you be travelling, you can adjust the boiler start time in relation to when your due home on your phone or other device, should you be delayed for any reason you simply adjust the time on your device.

Class 5 modulating controls, can provide an increase of 3% system energy efficiency, as they have a direct impact on the efficiency of the modulating combi boiler, by modulating the flow temperature in line with the internal temperature of the property.

Easy Remote

Advanced class 5 remote control (full colour display), which performs the dual function of a thermostat and remote control of the boiler. This controller must be wired from its location to the gas boiler.

Easy remote controller – Wired – from Flexiheat UK

• Daily / weekly heating and hot water programming;
• Heating and hot water temperature setting;
• Reset by remote control in the presence of resettable fault codes – rapid diagnosis
• Thermoregulation management for reduced running cost of the heating system
• Appliance parameter programming (technician level)

Cloud Warm WIFI (Wireless) Controller

A free-standing class 5 advanced remote control (full colour display) thanks to the free downloadable app which performs the dual function of chrono thermostat and remote control of the device from a mobile phone or tablet.

Cloud Warm Wired controller from Flexiheat UK

• Daily / weekly heating and DHW programming;
• Cloud warm application available for free on the Apple Store and Google Play; No annual charges to pay
• Heating and DHW temperature setting;
• Push notifications to a mobile device in the presence of any abnormality or fault;
• Reset from a mobile device in the presence of resettable fault codes;
• Thermoregulation management for reduced running cost.

Cloud Warm WIFI (Wired)

As above functions, but this unit must be wired back to the 50kw gas boiler

Cloud Warm Wireless Opentherm controller from Flexiheat UK

Brand and Quality manufacturing

With its modern design, with A rated ErP efficiency for heating and DHW (energy savings trust approved) this combi gas boiler with design led product aesthetics , and all installer touchpoints for ease of installation is well suited to larger homes.

Our 50kw combi boiler for larger homes is manufactured in accordance with ISO 9001 and ISO 1400 certified management systems and testing techniques. Should you require more information, best deal, free boiler quotes or delivery times, then please contact our sales teams for the best 50kw gas combi boiler in natural gas or LPG on the UK and Irish market. You can call our office on 01202 822221 or send an email via our contact form.

Electric tankless water heater range – 9kW to 36kW output

3 phase tankless water heaters from Flexiheat UK

Our Electric tankless water heater range are 100% energy efficient instantaneous water heaters, that provide domestic hot water in a cost effective manner as they heat water only on demand without wasting energy.

Being an electric water heater, they require a three phase electrical supply as you require the Amps to provide hot water at an adequate flow rate for a bath, shower or multiple hot water taps such as kitchen sink taps or bathroom sinks taps in properties or commercial buildings.

Key takeaways

• The main disadvantage of electric tankless water heaters is that the electrical power ratings set a limit on the hot water flow rate output achievable.
• This is why generally you require a Three phase electrical supply rather than a single phase electrical supply to power the instant water heater units.
• Single phase electric can’t supply the Amps (power) required for an electric instantaneous water heater
• Heating water by providing hot water on demand lowers energy consumption and lower price energy bills for your water heating system.

Tankless water heater electric powered advantages

When opposed to conventional tank-based water heaters, tankless water heaters—also referred to as an on-demand water heater, instant water heaters or instantaneous water heaters or an inline electric water heater—have a number of advantages. Here are a few of the principal benefits:

1. Energy efficiency: The electric element heats only heat water when there is a demand, unlike storage tank-type water heaters that continuously heat and reheat stored water. This on-demand instant hot water heating process can save a significant amount of energy, reducing water heating energy costs by 20-30%.Electric instantaneous water heaters are 100% energy efficient

2. Space-saving: Tankless water heaters are much more compact in size compared to bulky storage hot water tank heaters and are easier to install. This makes them ideal for homes, smaller homes or apartments with limited space, as they can be mounted on a wall or installed in cupboards.

3.No pressure and temperature safety valves or hot water expansion vessels are required to be installed as there’s no hot water storage in the instant water heater appliance – Thus you don’t have to comply with the “G3” unvented water heater regulations that we have in the UK for hot water installation.

3. Unlimited hot water supply / endless hot water: If the capacity of a standard electric storage tank water heater is surpassed, you can run out of hot water if the tank’s capacity is exceeded .In contrast, instantaneous water heaters have an infinite supply of hot water—so long as the demand doesn’t exceed the instant water heaters flow rate capacity.

4. No standby energy losses: Storage tank water heaters constantly lose heat through the tank walls, even when no hot water is being used. Instant hot water heaters eliminate this standby heat loss, further contributing to energy savings and reduce energy bills for your domestic water heating.

5. Lower risk of leaks and floods: Since instant water heaters don’t store large volumes of hot water, they have a lower risk of leaks and flooding compared to electric storage tank hot water heater models, which can cause water damage if they fail.

Electric tankless water heaters, with their energy savings and longer lifespan, can make them a cost-effective option in the long run, especially for businesses or households with high hot water demand or require a unlimited supply of heated water and in areas with high energy costs due to their 100% energy efficiency.

Instantaneous water heaters range

Our electric tankless hot water heaters have four power ratings, or output ranges, in “one” tankless heater unit. Except for the 27kW and 36kW electric instant water heaters which only have one power setting .

I.e. Our 9kW to 15kW electric instant water heater allows users to select power ratings of 9kW, 11kW, 12kW, or 15kW in one model and our 17kW to 24kW instant water heater can be set to 17kW,18kW,21kW or 24kW.

The cold water at the deepest of winter periods is normally 10C in temperature , thus the standard temperature rise of 30 °C is required to provide hot water for use in the winter period. This is shown as Δt=30 in the data below. So you can select the right model for your requirements.

Please note that this range of compact instantaneous water heaters require a minimum flow rate of 2.5 litres per minute to start heating the water. They will not operate if the flow rate is lower than this point.

Our 11kW to 27kW instantaneous water heater models feature a LCD display showing the instant water heaters set temperature 

The display on our hot water heater from 9kW to 27kW , showing the hot water temperature set on the water heater

These range of instant hot water electric heaters use bare wire heating elements in the heat exchanger which are particularly well-suited for use in hard water areas

Our 36kW instantaneous water heater has a traditional temperature dial and look like this –

36 kW Electric tankless water heaters with no standby energy losses

Our 36kw tankless water heater uses copper shielded heating elements within a heat exchanger, this dependable technology ensures long lifespan of operation and resistance to air bubbles and water deterioration.

These electric water heaters can provide enough hot water for commercial applications

Full manuals are here for these instant water heaters 

EIWH5 Series Electric instant water heaters manual from 9kw to 27kW – Flexiheat UK

EIWH36 – 36kW Electric instant water heater manual – Flexiheat UK

Instant Water Heater

Whether the instant water heater is supplying fixtures such as shower, bath, sinks or multiple taps, our electrically powered units heat water ‘instantly’ as it flows through the appliance.

They can be installed either as inline electric water heater or in series to provide enough hot water to suit all installation requirements.

Energy efficient Hot Water heating

Being 100% energy efficient, our 3 phase tankless water heater range have accurate temperature control of water flows you can rely on for daily use in business or domestic water heating applications without storage tanks. You get endless hot water for your hot water tap or shower with reduced energy bills.

Contact us

Should you require further assistance, check stock, or get a price on the best electric tankless water heater  product range on the UK market which are 100% energy efficient, then please don’t hesitate to contact our sales team on 01202 822221 or click here for our email contact form.

Air Curtain Basics | What is an Air Curtain + How Does It Work?

Air curtain basics -What is an air curtain and how do they work ?

A device that creates an air barrier across a door’s whole opening to divide two environments is called an air curtain.

Typically, the air curtain keeps flying insects, odours, humidity, dust, and debris out of the conditioned interior air and keeps it separate from the outside air. Air barriers, fly fans, air shields, and air doors are some other names for air curtains, depending on the sector or even the area in which they are used.

How does an air curtain work?

Typically, an air curtain is installed indoors above a doorway, where it draws air into the device’s intake.

This air can be ambient, i.e., taking the interior air from the inside of the building at whatever temperature that temperature is, or you have the option of heated air curtains, either by electric or hot water heaters, blowing warm air and blocking frigid winter winds.

Air curtains create a laminar airflow, which is produced as a result of this air being driven and accelerated through a small outlet that runs the length of the air curtain. To attain optimal performance, the air discharge angle can be modified using the adjustable blades that come within the air curtain.

Air must travel farther until it reaches the floor when the discharge angle increases.

If the discharge angle is too large, the air curtain won’t be adequate to prevent any wind from infiltrating near the floor because the air’s velocity drops as it moves farther away from the curtain. The air exiting the unit won’t have enough downward force to prevent a substantial gust of wind from entering if the discharge angle is too slight.

Do air curtains really work?

Definitely! All studies and experiments have shown that air curtains work. When an energy-efficient air curtain is correctly installed, it saves a lot of energy while keeping the entrance area temperature protected, comfortable, and free of drafts, insects (this is why air curtains are sometimes called fly fans), smells, and so on from the unconditioned outside air, which can be cold or warm air depending on the time of year.

Air curtains create temperature and environmental separation

In one line, “They create an effective seal on a doorway via a high velocity air flow discharge or air flow stream that ensures environmental separation for doorways or entrances to buildings.” This airflow can be ambient or heated, depending on the requirements of the separate environments.

When are air curtains commonly used?

Air curtains prevent cold air from entering everything, from an employee entrance or customer front door all the way to large loading bay doors. The air curtains create a recirculating, clean air invisible air door as such, resulting in considerable cost savings on the heating energy bills. These energy savings can be up to 40%, depending on the door usage characteristics, as they effectively separate environments.

Used everywhere from food service industries, restaurants, hotels, shops, and cold storage locations to busy warehouses to ensure environmental separation.

Retail applications

In a retail setting, air curtains are frequently placed above a store entryway or other commercial front door. These retailers consistently see foot traffic during peak hours. Even when the business is steady, opening and closing doors all the time could overload the building’s HVAC system and let in insects, dirt, vapours, humidity, and excessive heat or cold.

Warehouses or production facilities

Warehouses are the industrial version of retail. The continuous in-and-out movement of goods is common. The loading dock doors can let in a variety of undesirable elements, such as dust, odours, insects, significant temperatures, humidity, and debris, even if they are opened for a brief period. For those who work close to the doors, it can be unpleasant because they will freeze in the winter and sweat in the summer.

Air curtains for industrial use contribute to a more comfortable environment. They can also lead to increased worker comfort, productivity, and safety. In congested warehouse facilities where forklift traffic is high, visibility is critical, as air curtains create an invisible barrier of air—no dirty strip curtains to create safety hazards and provide a poor air seal.

Food production facilities and restaurants

Facilities that produce and serve food are subject to strict regulations and must maintain the highest standards of hygiene. They are also particularly appealing to insects because of their prep areas and delivery doors. Because insects and strict hygiene standards don’t mix well, air curtains are a great way to significantly reduce flying insects from entering restaurants and other eating places. Air curtains are commonly used to keep hot, humid air out of the interior, in addition to keeping insects out. Air curtains complement these locations very well.

Hospitals, schools, or offices

Despite their distinct differences, all three locations see a steady flow of people entering and leaving through a variety of doors. They are all alike in that they invite outside air, insects, and vapours inside when their doors are open. Entrance doors, delivery entrances, loading docks, and other doors can all benefit from air curtains to keep out the elements, ensure energy savings, and improve workflow.

Ambient or hot air?

Air curtains create an invisible barrier; they can do this with ambient air, which is the air from the room that the unit is installed in. The building’s primary HVAC system provides the heat or chilled air to the room, and this is passed through the unit at a high velocity.

The other option is heated air curtains, which heat the air with a heating element. We have a dedicated webpage here for our electric heated air curtains or hot water heated air curtain units.

Understanding the basics of air curtains

There are three main considerations to ensure that all air curtains work in the correct manner. These are

• An air curtain unit’s length should never be shorter than the door width if installed horizontally above the door.

• An air curtain unit’s length should never be shorter than the door height if installed vertically at the side of the door.

• Depending on the site conditions, the air curtains’ air velocity must meet the specified speed (usually the discharged air reaches a minimum of 2.3 metres per second at floor level). As a result, when selecting air curtain requirements, it is important to consider the height of each proposed door or opening as well as the prevalent interior and exterior climatic conditions that units’ air velocity may have to tolerate.

Energy Savings

A study by Cardiff University showed that in a typical convenience store in the UK, the heating load for the base case was 48 W/m2 per year. Both an air curtain and an automatic door can significantly reduce the heating load to 11 W/m2 per year and 19 W/m2 per year, respectively. This was a 77% reduction in heating energy consumption and considerable cost savings and a great return on investment.

Source Cardiff University- Investigating the Energy and Thermal Implications of Installation of an Air Curtain

Fumes, dust, exhaust, and debris control

Air curtains can provide a barrier that limits the penetration of undesired pollutants in locations with high levels of dust, odours, and debris. Air curtains keep these elements from accessing locations where people work or congregate, improving overall safety. From a customer’s entrance door in a restaurant to shopping centres or warehouses, the ability to block these detrimental substances in the outside air is crucial.

Buying an air curtain? Here’s what to look for:

Negative air pressure

If there is negative air pressure due to mechanical exhaust or stack pressure, the building’s air curtains will experience reduced effectiveness.

Installation requirements

Note the clearance to the ceiling on the side of the opening where the air curtain will be installed, as well as any obstructions above the doorway or entrance. Air curtains often require a minimum distance to work correctly and ensure maximum wind-stopping capability.

Vertical Installations

Mounting air curtains vertically places the unit’s operating noise at ground level, which should be considered. To protect and prevent damage to the air barrier, it is strongly recommended to install a barrier or bollards that shield the air curtains from potential damage caused by forklifts, etc. Here is our dedicated webpage on vertical air curtains.

Conclusion 

If you require any more advice or need to clarify anything on air curtain basics, what is an air curtain or how air curtains operate, please don’t hesitate to contact us at Flexiheat UK.

Unit heaters for Poultry and Pig farms or Swimming pool heating applications

Unit heaters for poultry farmers, pig sheds or swimming pool heating or other arduous heating applications

When warm air space heating certain applications such as indoor swimming pools, poultry farms or sheds and pig breeding facilities it can be difficult due to the arduous conditions that hot air heater need to withstand.

We supply a full range of hot water fed warm air unit heaters that are the perfect solution for these heating requirements. Whether it be heating a commercial poultry shed, farms, greenhouses, barns, nurseries, swimming pools, stables, or other similar livestock buildings or structures.

The “HCF” series of hot air unit heaters are predominantly for heating environments with high-dust or chemical concentrations, as well as for food production or farming company operations.

Warm air space heating for difficult environments

Agricultural farming heating applications often include a high concentration of acids and ammonia (especially relevant to pig sheds / farms), as well as a high quantity of dust in the air (especially relevant to poultry farms / poultry farming)

Swimming pool air heating systems also must be suitable for a high chlorine content within the air, which is very corrosive to warm air heaters heat exchangers.

High ammonia or chlorine air content damages standard heat exchangers – thus a protective coating is required for a pig farm or poultry houses or air heaters for swimming pools

Air Heaters

These warm air space heaters are fed by hot water, which can be generated by LPG or natural gas, oil or biomass boilers (wood pellets or logs) or alternatively heat pumps either air source or ground source units for higher efficiency to reduce energy costs.

This heated hot water is then pumped around the heating system to the unit heaters which can be wall mounted or suspended from the ceiling of the building to expel the heated air flow.

The heat output is directly related to the flow and return temperature supplied to the unit heater, and the desired air temperature you would like to achieve to overcome the heat loss of the building in question.

Construction of the heaters

This range of unit heaters has the casing manufactured from expanded polypropylene, which is abbreviated to EPP, and is a recyclable moulded foam that a distinct set of characteristics that are hard to come by in any other material:

• Impact absorption provides strong damage resistance and form recovery. This reduces the likelihood of damage during operation or installation.
• High resistance to the environment: able to withstand most chemicals, including oils and lubricants.
• Lightweight: These heaters’ lower weight makes installation simpler.
• Noise absorption characteristic: which lessens vibration and noise from the heater in operation.
• Great structural strength and capacity to support loads.
• Good insulation properties – which means the heat is not absorbed by the heater casing but rather into the areas being heated, ensuring high efficiency in operation

Heat exchanger construction and advantages

The heating coil within this unit heater range is constructed using energy efficient copper and aluminium, which can be supplied with hot water up to a temperature of to 120 °C and a pressure of up to 16 Bar.

The heat exchanger then has a special GOLD EPOXY coating applied to it, which includes an anti-bacterial layer.

We treat the heat exchanger of the unit which has aluminium fins with a Gold Epoxy polyurethane coating, which helps to preserve HVAC equipment from corrosion, reducing energy expenditures, maintenance expenses, and premature replacement.

After this initial coating, the heat exchangers are also having an additional epoxy coating, which is applied to protect the heat exchanger from highly corrosive environments. The epoxy layer has also undergone the salt spray test according to ASTM B 117.

This coating has the following benefits and advantages –

• Increases the lifespan of the unit heaters in harsh environments by preventing corrosion of the heat exchanger coils.
• The heating capacity of the unit heaters is also unaffected by the epoxy coating.
• The epoxy layer has undergone the salt spray test as well.
• The antibacterial layer stops bacteria from growing within the heating coils of the unit heater.
• Furthermore, the elastic layer of the epoxy coating prevents cracking when the coil is thermally dilated.

Product range

We do two units, both are equipped with the protected heat exchanger construction for arduous use, and can be either be wall mounted or ceiling mounted in any commercial buildings –

The HCF IP54 – 3S industrial unit has a IP54 rated motor, which has 3 speeds – heated output rating of up to 58.5 kW at a flow temperature of 120/90°C and 0°C inlet air temperature.

Or

The HCF IP66 industrial unit has a IP66 rated motor, which has a one speed fan – heated output rating of up to 66.2 kW at a flow temperature of 120/90°C and 0°C inlet air temperature.

HCF IP54 or IP66 motor rated air heater

This detail is included in our brochure which can be downloaded here

Download the HCF series of unit heaters for poultry and pig farms or swimming pool heating brochure -Flexiheat UK

and the technical manual is here

Download the Technical Manual – HCFIP54-3S and HCFIP66 hot water unit heaters

Unit heaters for Swimming pools

Swimming pool heting using unit heaters

Indoor pools are often heated all year, the pool area must be kept at a high temperature (about 32 degrees Celsius when the pool is in use), and the structure itself is likely to have a substantial quantity of windows, resulting in poor thermal insulation values.

To keep the humidity in a pool room at a tolerable level and to protect the building’s fabric, you’ll need a good hot air heating system with enough power to quickly bring the air temperature back up to the desired air temperature while the pool is in use.

Our unit heaters for swimming pool heating systems have a EPP plastic manufactured casing which is resistant to air with a high chlorine content. EPP is a robust material and a 100% recyclable product as well.

The Gold epoxy polyurethane coating with its high chemical and high salt spray resistance features ensure that our swimming pool heaters provide the best protection from the chlorinated air and ensure reliable longevity of the product.

The unit heater we recommend for swimming pool heating systems is our IP66 unit, which is a single phase powered heater. This “IP” means the motor has total dust tightness and has protection against a stream of water (100 l/min) from any direction. Water being an obvious potential hazard in a swimming pool environment.

Although if the unit heater is to be placed in a location further away from the pool itself, then the IP54 motor rated units, which can sustain water splashed against the motor from any direction and have no harmful effects should suffice.

If in any doubt, go for the IP66 rated unit is our advice.

Agricultural heaters

Agricultural heaters may be utilised in a variety of settings, including greenhouses to maintain appropriate growth temperatures and frost protection and barns to keep livestock warm through cold weather.

We’ll will break the section of agricultural heaters down to applications.

Poultry heater

With poultry farm heating or other farm animals such as turkeys etc, the biggest issue is the amount of dust that occurs within the poultry houses or farm. This dust can block the heat exchanger up, thus the requirement for easy cleaning is essential.

The “HCF open is fitted with a completely opening casing that allows easy servicing access to the units heat exchanger.

Unlike direct-fired gas or oil-fired heaters, which bring combustion gases into the poultry farm,our air heaters do not introduce water vapour into the building, resulting in drier litter and higher air quality, which leads to greater bird development when using our unit heaters in poultry farming heating.

HCF “Open” series – the heat exchanger is easy to clean, as the unit will pivot open which is essential in poultry farm heating

This unit has gold epoxy coating and an “IP66” rated fan motor to handle these types of site conditions that a poultry heater must endure.

HCF Open series Poultry heater for a poultry house or shed

Full heat output data are detailed in the following brochure

Download the HCF Open series unit heaters brochure – Flexiheat UK

Greenhouse heating

Thermal conditions that are optimal support healthy plant growth and boost crop efficiency.

The fans of the units make sure that heat is distributed evenly throughout the greenhouse. This ensures that there are no cold or overly hot areas.

Our hot water fed unit heaters allow you to adjust growth conditions, resulting in improved crop quality and output regardless of the size of your greenhouse.

Dust usually isn’t an issue in greenhouse heating – thus we would recommend our HCF IP54 unit or the IP66 unit.

Thermostat and controller options

We can supply this range of high efficiency wall mounted or ceiling mounted space heating units with various control options.

Thermostats and timers: Our selection of thermostats and programmers allows you to regulate the heating zone’s temperature as well as the times that the units run.

A three-speed fan controller with thermostat, a fully programmable controller – designated the “HMI” controller, and actuated control valves.

Control and valve accessories for the range

Contact us

Should you require any prices or to check stock on our Unit heaters for Poultry and Pig farms or Swimming pool heating applications, then please don’t hesitate to contact our sales team on 01202 822221 or use our email contact form via the contact tab above to message us.

Glass Lined Hot Water Storage Tanks

Glass lined hot water storage tanks, also called vitreous enamel lined hot water tanks, are storage tanks or buffers that are normally used for domestic hot water storage(potable water), although the hot water doesn’t have to be of this quality. They are storage tanks manufactured in carbon steel but with glass or vitreous enamel corrosion protection of the metal surfaces in contact with the hot water.

The glass lining provides a robust internal surface for water storage tanks that must endure the wearing effects of high volume, high-temperature hot water and prevents corrosion of the storage tanks.

Our glass lined storage tank range can also be used to store cold water too, as our glass coated steel tanks can operate with cold water down to 5C (the lowest cold water mains temperature that we see in the UK)

Glass Lined Storage Tanks

Our glass lined hot water storage tanks can also be used for cold water storage too, as they are designed to withstand temperatures down to 5 degrees C. The hot water temperature limit is 95 degrees C, depending on the model.

How is the vitreous enamelling or glass lining applied?

All interior linings of domestic hot cylinders must be “Food Grade quality” according to EU Regulation 1935/2004. Our vitreous enamelling has food grade certification at 95 °C, ensuring maximum quality at severe operating temperatures.

Using a sophisticated “surface treatment” on the carbon steel surface, combined with an automated enamel coating procedure, results in much more than a robust mechanical adhesion of the lining. A molecular interaction develops between the steel surface and the applied enamel layer during the curing process.

This maximum bonding of the enamel coating to the steel surface, along with the vitreous enamel’s high level of impermeability, and ensures the tank’s durability and keeps it from breaking down in ways that can happen with other types of coatings, like the protective coat coming off or blistering.

When to use glass lined storage tanks

These glass lined steel tanks are the most widely used for storing potable or waste water in building services or process equipment applications, but they are also suitable for dosing chemicals, numerous industrial effluents, or reagent materials since they combine the corrosion resistance of glass with the hardness of steel at a very cost-effective price.

Cathodic protection system via sacrificial anodes

A magnesium sacrificial anode in glass-lined tanks assures potable water quality. These sacrificial anodes guarantee that the domestic hot water is safe to drink by drawing contaminants from the nearby water supply. If the magnesium anode rods strike the glass while lying down, it might cause glass shattering or crazing (fine cracks on the surface of the material). It is critical that glass lined steel tanks be kept and carried upright.

The sacrificial anodes, through an electrochemical process, are designed to attract particles of limestone, iron, and other minerals present in the water and corrode instead of the glass lined tank. In simple terms, it “sacrifices” itself to help the range of glass lined storage tanks last longer.

Most glass lined storage tank manufacturers advise inspecting and evaluating the sacrificial anode’s condition every year and replacing it when it has been depleted by more than 50%. This is particularly important if you have hard water or use a water softener on your domestic hot water.

Storage Tanks Product Range

We have two ranges of glass lined water storage tanks; these are

Our SAC series

These have capacities ranging from 300 to 5,000 litres, with a maximum water temperature of 95 °C.

With a maximum working pressure of 10 bar for the 300 to 1,000 Litre capacity models

As standard, the 1,500 to 5,000 Litre tanks are 6 Bar rated – with the option of 8 bar manufactured units.

Glass lining will cope with high temperature hot water up to 95 Degrees C.

All units come with insulation with ErP energy ratings of “B” or “C” depending on size, to minimize heat loss.

Full details on this series of glass lined storage tanks are here –

Download the Flexiheat SAC Glass Lined storage tanks or cylinders for domestic hot water storage brochure

Finished in grey PVC RAL 9006 colour lining or jacket up to 2,000 litres, and white PVC RAL 9001 above this volume.

They are manufactured to the 2014/68/UE Directive, ART. 4.3, without CE marking Standard EN 12897:2016.
These buffers are designed and built in accordance with the requirements of 2009/125/EC.

Labelling in accordance with the requirements of 2017/1369/EU and Delegated Regulation 812/2013 (EU)

Glass lining corrosion protection to DIN 4753 and come with a 5-year warranty.

Our Coral Vito series

This series of glass lined water storage tanks has capacities ranging from 200 litres to 6,000 litres, with a standard pressure of 8 bar (10 bar optional upgrade) and a maximum operating temperature of 90 °C.

ErP rated “C” or better to minimize heat loss, glass lined steel tanks with magnesium anode rods as standard (option of upgraded permanent electric anodes)

These hot water storage models all benefit from an inspection and clean outdoor or manhole which is 146mm for the 200 to 1,500 and a larger 400mm manhole option is available from 800 litres upwards for these glass coated steel tanks.

RB models with larger 400mm inspection / clean out manhole

Full details are on the following brochure – please see page 10 for 200 to 1,500 Litre tanks , and pages 35 & 36 for the 1,500 to 6,00 Litre tanks

Domestic hot water cylinders and storage vitreous enamelled units from Flexiheat UK

Soft water areas: be aware

Glass-lined storage tanks can succumb to significant corrosive damage quickly under naturally soft water conditions, despite the use of sacrificial anodes.

Purer, soft water has poor electrical conductivity due to a lack of dissolved metal ions; therefore, the electrical flow from the anode to the cathode via the water is decreased. This has a negative influence on the chemical interaction between the sacrificial anode and the storage tank shell, resulting in less protection.

When the sacrificial anode is evaluated in such circumstances, its condition may be exceptionally good, but this is likely to be a significant signal that the anode is failing in its job, implying that the water tank itself is corroding.

An electrically powered anode is a common substitute for the sacrificial magnesium anode rods. A powered anode, which is frequently constructed of titanium, creates a very low current in the water rather than giving up its own electrons and creating an electrolytic current. This should provide a similar level of protection for a glass lined tank while not corroding the anode. However, in soft water conditions, even an electrically powered anode may still be ineffective since the conductivity required by the anode is insufficient.

As a result, in Scotland, west Wales, and the north-west and south-west of England, where the water is very soft, you are almost always going to need a stainless steel hot water storage tank.

Please see more on our range of stainless steel hot water storage tanks

Water heating

These glass lined storage tanks or buffer tanks are often used in conjunction with either tankless water heaters or suitable air source heat pumps, gas, or oil boilers that, via a plate heat exchanger, can provide the domestic hot water and space heating requirements. The glass lined storage tanks provide a buffer volume of hot water to accommodate a variety of peak demands the building or process may encounter.

Hot water system volume

With various capacities of tank sizes available, from a small 200 Litre to 6,000 litres in single glass lined steel tanks (you can also couple the units up in series should you require higher capacities), our range gives us the flexibility to cover all storage capacity requirements you may have.

Glass lined storage tanks

Should you require more product information, check stock, technical support, budget options, prices, or to place an order on our glass lined hot water storage tanks, then please don’t hesitate to contact our sales team on 01202 822221 or use our email contact form via the contact tab above to message us.