24kW Combi Boiler

A 24 kW combi boiler is an ideal new boiler that is suitable for a smaller one or two bedroom homes, apartments or flats.

Because there isn’t much space to heat in these-sized properties, there are normally fewer than ten radiators (the average size of radiators in a new build property is 1.5 kW). There is also less demand for domestic hot water in the property because they frequently have a shower or a single bath that can’t be used simultaneously.

Our 24 kW combi boiler is a small boiler that provides both heating and hot water on demand which eliminates the need for cylinders or storage tanks.

With a central heating output of 24.79 kW at a 50/30C flow and return temperature and a domestic hot water output of 11.5 Litres a minute with a 30C hot water temperature rise for this boiler type.

With its compact dimensions, it is designed to fit into a standard 350mm deep kitchen cupboard unit and has a low lift weight, which makes them the right combi boiler for these types of properties.

These combi boilers are are available in natural gas or LPG ( propane) gas and benefits from great features such as a large digital display for easy of use as well as a reduced noise level.

This gas combi boiler has an ErP rating of : Water heating efficiency “A” and a space heating efficiency “A”  – for this combi boiler size, thus reducing energy usage.

Having this 24kw combi boiler installed we can cover the hot water demands for most small to medium homes or flats with a single bathroom, without the need for a hot water cylinder, with the units being powered by either natural gas or propane (LPG).

A new boiler or a replacement should always be installed by a Gas Safe registered engineer.

Instant warm water on demand

The instant hot water system, provides energy efficient hot water to the taps or bathroom with no hot water storage tanks in small to medium homes, and that’s why the Energy Saving Trust recommends a high efficiency combi boiler as well as multiple heating engineers, when installing a new heating system or to replace an existing non condensing combi boiler in your flat or smaller property.

Larger properties, with more bathrooms will have a higher demand for instant water , and require a larger boiler size to achieve the local availability of warm water to the hot tap or showers through the home – as a boiler guide we do a 35kW combi boiler ( typically to suit a three bedrooms home for example) and a 50kw combi boiler suited or capable of doing more rooms such as a 4 or 5 bedroom property depending on related factors such as available mains water flow rate to the home. The 50kW combi boiler version has its own dedicated webpage, that shows all its features and performance data here : 50kW combi boiler

High efficiency combi boiler

All boiler manufacturers have since 2005 , have had to make a high efficiency combi boiler which is condensing in operation to help reduce carbon emissions via the combi boilers lower carbon-footprint. It has been mandatory to install condensing boilers, whether they are combi boilers or system type boilers.

Our easy-to-use combi boiler is “A” rated for both heating and hot water, making it a high-efficiency combi boiler for medium homes or smaller homes.

Hot water heat exchanger

The 12mm diameter internal stainless-steel pipe where domestic hot water is produced, is inside the patented stainless steel heat exchanger (28mm diameter) which ensures excellent reliability. Its total length is 8 meters, and this ensures you have a volume (approximately 6 Litres) of “warm water ready to go” as they say. The DHW production is always available and always in condensing operation, resulting in lower energy costs and bills for these combi boilers.

Stainless Steel heat exchanger with large water ways to prevent blocking in our combi boiler range

This design feature also reduces the chance of scale, something that older technology combi boilers that use a plate heat exchanger can suffer from. This is incredibly important in hard water areas– as our heat exchanger, with its high velocity and flexing in operation, reduces the ability for scale to build up, and prevents this happening ensuring a long life 24kw combi with trouble free operation and a good hot water flow rate.

Scale blocking the heat exchanger – older technology heat exchanger systems for DHW production

This unique and clever engineered solution for our heat exchanger system provides many advantages as opposed to most boiler manufacturers that use a traditional separate plate heat exchanger system, for the domestic water. This why many consider our 24 kW combi boiler the best combination boiler on the market in the UK, with high reliability at a fair market price or cost.

Central heating system or space heating of the combination boiler

A combi boiler provides warm water for radiators or an underfloor heating system or any other type of space heating, with our compact 24kw combi model having a hot water (DHW) priory system. The total heat requirement (radiators ,underfloor heating etc) should not exceed 24.79 kW of heat output based on a 50/30C flow and return heating when in operation on the coldest of days for this boiler size.

How many radiators will this boiler size cope with – generally in a new build – 10 average size radiators

Specifications of the R2C24 combi boiler 24 kW condensing boiler

The models comparison of technical data, is covered in the picture below.

Please note that the central heating output of this 24kw combi depends on the flow and return temperatures to the heating system, i.e., at 50/30C it will produce 24.79 kW, or if it’s 80/60C then the output is 22.7 kW. The domestic hot water output doesn’t vary; this is a constant.

Hot water flow rate -11.5 Litres/minute in typical winter time – when you need warm water the most !

and in more detail in the manufacturer manual – which can be downloaded here –

Download the Flexiheat R2C 24kW Combi  Manual

Dimensions

Our 24 kilowatts combi boiler dimension details are generally – Height = 642 mm , Width = 410 mm  and a Depth of 307 mm –  making the units easy to fit in any installation with in line hydraulic connections at the bottom of the 24kw combi boiler.

24kW Combination boilers with high modulation

Our combi boilers have an exceptionally high modulation range or ratio of 1:9 for this size boiler, which means our 24kw combination boiler will ramp all the way down to 2.9 kW of heat output. This high modulation range ensures the closest of heat load matching to the properties demand, which results in lower heating energy bills.

Frost protection

These combi boilers fire up when the water temperature drops below 5 °C within the heat exchanger, automatically starting the burner until the heating water reaches the temperature range of 30 °C. This frost protection system will protect the boiler up to an external temperature of -10 °C.

Flue lengths and options

With extensive flue lenghts options of up to 60 metres in flue length – when using a sperate 80mm diameter twin flue system, or up to 10 metres in length when using our 60/100mm or 12 metres maximum horizontal flue for our 80/125mm co-axial horizontal flue system option (which most people go for)- Both systems make these combi boilers a room sealed gas appliance.

Horizontal flue kit co-axial – 60/100mm Ø will go 10 metres , or the 80/125mm Ø option will go 12 metres in flue length

Or our vertical flue options

Vertical flue kit co-axial – 60/100mm Ø will go 10 metres , or the 80/125mm Ø option if your require more height – will go 12 metres in flue length

Control options

All our boiler sizes, be they the 24kW, 28kW or 35kW outputs or models can be controlled via the inbuilt digital display or you can opt for our smart thermostat range option, which is an open-therm control system, which allows you to control these combi boilers from an app on your phone, tablet, or computer in a user friendly manner.Simply click on the app to control your 24kw combi boiler, its as easy as that !.

Cloud Warm App – control on the go !

Nest and Hive controllers are Opentherm compatible, so you can use these with what we consider the best boiler on the market.

An Open-Therm thermostat controller is a smart controller which helps your central heating run in an more energy-efficient state, as they can optimize and weather compensate the heating systems to the external weather conditions – Explained very well in the following video –

Condensing boiler installation

As gas safe heating engineer installer, normally with local availability must be used to ensure a safe installation ( always check their company registration number with the gas safe register) and to provide a labour warranty on the 24kw combination boiler install.

Contact us

Our 24kw combination boilers are the ideal boilers for a smaller house, apartment or flat, with its compact dimensions this size boiler can fit in a kitchen cupboard if so required. Should you require anymore assistance, information or price on the best 24kw combi boiler  in natural gas or LPG on the UK market, please contact our sales team on 01202 822221 or use our email contact above on the web page for our email contact form to get free boiler quotes. All of sales are supplied with a vat invoice.

500 Litre Buffer Tank or Vessel

Our 500 Litre buffer tank or 500 litre buffer vessel, is a hot water buffer tank normally used to store heating hot water or increase the heating system’s hot water volume. This energy is retained for later use and results in fewer but longer heating cycles for the heating system with our buffer tanks or accumulator tanks.

500l buffer tank for a heating system

This 500L buffer tank ( also called a 500l thermal store)  can be used on various heating systems, but is often used in conjunction with renewable heating systems such as biomass boilers or low carbon systems such as ground source heat pumps or air source heat pumps as a heat source.

Air source heat pumps

For a heat pump to operate at peak efficiency, our buffer tank, also known as a buffer vessel, ensures minimal compressor run times and minimum water flow rates. For air source heat pumps, a buffer tank is necessary because it supplies the defrosting energy for the heat pumps. If a heat pump is the only source of heating, it is also possible to integrate an electric immersion element to provide additional heating as needed to our multi port buffer tanks.

Specification of our buffer tank or vessel

Technical specifications of our 500 Litre buffer vessel , 500l buffer tank or 500l thermal store.

Our 500L buffer vessel or tank – overall height 1,735 mm, overall diameter 760 mm with insulation – 600 mm diameter with insulation removed.

Tank storage capacity – 500 Litres nominal – 479 Litres actual tank volume

Height – 1,735 mm

Diameter with Insulation: 760 mm – which allows you to get the buffer tank through a standard 800mm door way

Diameter without Insulations: 600 mm

Product insulation is polyurethane – 55 mm insulation

Insulation specification – Rigid expanded polyurethane with 95% closed cells, CFC and HCFC free, fire resistance class B2 according to DIN 4102-1

ErP rating – “C” rated with only 90 Watts heat losses

Flexiheat hot water buffer 500 Ltr capacity –

Our 500l buffer tank or accumulator tank is a great quality product at a great price.

This 500L buffer tank is manufactured from mild steel

500l buffer tank weight – 108 Kg when empty – 577 kg when full with hot water

8 x connection tapping’s – 40 mm (1 1/2″ ) female bsp – for the heat source or outlet designated “DN1,DN2,DN3, DN4, DN11, and DN18 ” on the above drawing

4 x Thermometer or sensor pockets – 15 mm (1/2″) female bsp – designated “DN15″ on the above drawing (sensor pockets are 1/2” female threaded).Any thermometers can be ordered separately from us.

1 x Air vent eliminator or safety valve tapping or bsp safety connection – 15 mm ( 1/2″) female bsp- designated “DN15” on the above drawing

Angles of the tapping ports as seen from above the 500 litre model.

Buffer tank maximum working temperature – 95 Degrees Celsius

Buffer tank maximum working pressure – 8 Bar

With plenty of tapping’s this 500L buffer tank can be fitted with additional immersion heaters as a backup or top-up heat source.

This 500L buffer tank is manufactured from mild steel, so corrosion inhibitors must be used with this product.

Full port dimensions off the floor for our 500 Litre model is listed in the following brochure.

Download the Flexiheat UK 100 to 5,000 Litre buffer Plus range of heating buffer tanks vessels brochure

Should you require another capacity or volume buffer tanks, a higher working pressure or a stainless steel version, then we do a full range of buffer tanks which are listed on their dedicated webpage.

Applications – hydronic heating systems

Our 500l buffer tank can be used with heat pumps, log fired boilers, gasification boilers, wood pellet boilers, or even traditional gas or oil boilers, Flexiheat UK offers a variety of multi-port buffer tanks and accumulator tanks.

Sizing criteria for a 500l buffer tank

Here are some guidelines on sizing for our 500L buffer tank

Air source heat pumps or ground source heat pumps: approximately 25 litres per kW of heat pump output (recommended by BS EN 14511 for defrosting of the heating system).

Wood pellet boilers: a minimum of 10 litres of tank volume for every 1 kW of boiler output.

Solid fuel boilers: a minimum of 30 litres of tank volume for every 1 kW of boiler output.

Wood chip boilers: a minimum of 12 litres of tank volume for every 1 kW of boiler output

Gasification boilers / log fired boilers: a minimum of 50 litres of tank volume for every 1 kW of boiler output.

Thermal storage tank or vessel 500 Litres capacity

If you require more product information, availability, technical support , check stock levels, delivery times or get prices on our 500 Litre buffer tank or vessel for heating hot water, then please don’t hesitate to get in touch. Contact our sales service team on 01202 822221 or use our email contact form via the contact tab above to message us. Connect with us on Facebook or Twitter for our latest products updates and special product price deals.

Industrial water heaters Gas or Electric

An industrial water heater provides a domestic hot water system – also know as DHW – which delivers hot water to fixtures used by people at the sink, in the shower, or bath and any other location where warm water may come into contact with humans for bathing or washing up etc. Hot or warm water may also be required for food and beverage commercial and industrial applications, processing or wash down industrial applications in abattoirs etc.

Commercial and industrial applications

Hot water systems or water heaters for commercial or industrial applications can cover hot water requirements for-

Commercial applications – commercial water heaters

Locations such as hospitals, hotels, swimming pools, schools, camping facilities, or sports or leisure centres may be considered commercial hot water heating applications, and thus require commercial water heaters, but we would consider a hospital, due to the way they operate and the capacities of domestic hot water they require, which can run into thousands of litres of warm water per hour.

Hot water systems for hospitals or health care environments

But there is no hard and fast rule when it comes to commercial water heaters, and when a commercial water heater becomes an industrial water heater as such.

Indirect Water heaters – for a hospital or a food or beverage processing plant water heating requirements

Most people go with the gas safe qualifications, in that for any gas appliance over 70kW input, the heating installer must have an industrial gas certificate or qualification to do the installation, so this seems like a good defining point when it comes to the difference between commercial water heaters and industrial water heaters.

Industrial hot water heaters

Industrial hot water systems or hot water heaters tend to be installed, developed and designed for process hot water applications such as food production, preparation, or wash down services, which can require high levels of hot water supply with regard to litres and often at high water heating temperatures.

Solutions for warm water requirements for food and beverage production by Flexiheat UK

These factors make our gas water heaters our most popular product range when it comes to solutions for water heating systems. Because gas delivers a remarkable amount of energy through a relatively small pipe, and because of recent legislative changes, any industrial gas water heater must now be condensing to provide maximum efficiency and benefits in reducing greenhouse emissions.

A water heater for a process application is normally just a simple calculation of the volume of water required and the temperature rise required.

Heat pump hot water heating

Heat pumps aren’t suitable water heating solutions at present as they can’t achieve the required water temperatures that the customer often requires, as heat pump systems can only achieve a temperature in the 50 to 55C range. To get up to the required stored water temperature of at least 60 °C, they have to use electric immersion heaters to top up the heat supplies—in essence, they can be called hybrid water heaters.

Whether the technology for heat pumps develops so they can achieve the higher hot water temperatures and kW capacities is to be seen. Hopefully so, as they have high efficiency. If you have the power supply available, as these units normally require a 3 phase electrical connection and take up a lot of space as storage tanks are normally required as accessories.

At present, heat pumps products aren’t really suitable for domestic water heating systems for commercial and industrial applications.

Electric water heaters

We have a dedicated electric water heaters web page that goes into full detail on the capacities in litres of the tanks and kW ratings available here.- Electric industrial and commercial water heaters

Commercial & Industrial electric water heaters from Flexiheat UK

We also supply an instantaneous three phase heater range, detailed here – three phase water heater range

Industrial gas water heaters

As mentioned previously, our gas water heater range is the most popular hot water systems for industrialised requirements due to the high pressure, kW, and heat output the range can produce.

The cost-to-output makes this water heater range a favourite with many a trading customer of ours.

We do a range of gas instantaneous water heaters with an output up to 400 kW which can provide up to 174 litres / minute of domestic hot water, with a high modulation ratio of 1 to 60.

instantaneous gas water heaters- condensing in cascade complete with pipework rig from Flexiheat UK

Full details are listed on our dedicated gas water heaters webpage here – industrial gas hot water heating

Or if you require large gas fired instant hot water production then these are detailed on this webpage commercial instantaneous water heater options

Or we can use these units with a DHW storage tank to account for peak demands or loads which are often found in process applications – these are detailed here – Domestic hot water storage tanks 

Contact us

Should you require any more support, selection and design expertise or cost on our industrial water heating products for commercial and industrial applications with high capacities in terms of litres and kW output, then please fill out your details on the contact us form page on the website, or feel free to contact our UK sales team professionals on 01202 822221 who are on hand to support and assist you with any part of your hot water heater project. Follow us on Facebook or Twitter for an overview of our latest news and products.

Room sealed LPG water heater – Flexiheat UK

Room sealed water heater

 A room sealed LPG water heater is water heater that draws combustion air from outside, and any waste gases ( also know as combustion gases or flue gases ) are sent outside rather than into the room.

Thus, when you have a room sealed water heater, this means that you can work or sleep in the same area, such as shower rooms or bedrooms, where the room sealed LPG water heater is installed in total safety, without the risk of fatal carbon monoxide poisoning.

Today, most LPG water heaters are room sealed and use full electronic ignition for maximum energy savings, ensuring minimal gas consumption and maximum savings as compared to the older pilot light type of LPG water heater.

The pilot light, or pilot flame, remained on all the time in older LPG water heaters. This consumed and wasted gas, which was not good for the fuel bills and the environment due to the constant burning of the pilot flame.

“Which” consumer magazine did a costing a few years ago, which showed that a pilot light cost an astonishing average of £97 per year just to operate.

That’s why these days a full electronic ignition LPG water heater are favoured and are standard unit for virtually any location such as a static caravan, log cabins, shower rooms or any suitable place that requires efficient water heating for their domestic hot water requirements.

Propane or LPG gas

Propane gas or LPG gas water heaters are used predominately in areas where mains gas, which is natural gas, is unavailable, such as log cabins , static caravan parks or we have even supplied our room sealed LPG water heater range for shepherd huts, as the maximum power consumption is a very low 36 Watts for our most common room sealed water heater, which is our SF14 model.

The unit can be powered by either an LPG gas cylinder or a bulk propane gas storage tank. An LPG gas cylinder is often used to power a static caravan and we have a dedicated webpage when using this water heater in a caravan here – Caravan gas water heater

Domestic hot water heater

Our most common domestic water heater that is powered by propane gas is our 24 kW , which is designated our SF14 Low NOx evolution model.

This unit will operate with an extremely low water pressure water supply (only 0.5 Bar is required ) and low flow operation.

This room sealed water heater can be used on a 12 volt electric system with the use of a small inverter due to the maximum power consumption only being 36 watts. So they can be fitted in virtually any location, such as horseboxes, shepherd huts with no mains electricity, in remote locations or even narrowboats, as the unit can be powered by a small inverter on a 12 volt system.

SF14 Low NOx instantaneous water heaters have the following features:

Internal picture of the room sealed LPG hot water heater ,showing the de-oxygenated copper heat exchanger with large 16mm water ways

• Wet chamber de-oxygenated copper heat exchanger that prevents thermal inertia in low flow operation with large 16mm water ways

• Excellent thermal efficiency for maximum savings and great flow rates.

• LCD display shows the temperature of the water being generated, and displays any fault codes should they ever pop up. The fault codes will tell the user exactly what the problem is, such as low pressure etc. Problem finding and solving is easy.

• Electronic control board with self-diagnosis-ensure constant monitoring of the room sealed LPG water heater. Water flow and water temperature are continuously monitored by a microprocessor to provide safe and effective water heating with minimal gas usage.

• Electronic ignition: Automatic ignition ensures no liquefied petroleum gas is wasted on a pilot light and minimal gas consumption.

• Ionization flame control with full electronic ignition.

• Adjustable water temperature of 35 to 60 degrees Celsius on the LCD display.

• Reduction of initial high water temperatures with low flow rates

• It will function on an extremely low water pressure of only 0.5 bar and with low flow rates.

• Industry standard horizontal flue kit or vertical flue options allow you to choose the suitable place to install the efficient water heating device in total safety.

• Fitting kit: our standard fitting kit includes all of the copper pipework tails as well as an isolating gas valve, cold water flow valve, and hot water outlet valve, reducing installation time.

• It can be fuelled by either LPG gas cylinders or propane gas cylinders. We recommend 47 KG propane gas storage cylinders as these can supply 33.8 kW of continuous domestic hot water heating per hour, which is more than the gas input of the SF14 water heaters, which is 24 kW.

• Because they can use portable gas cylinders, they are the best option for instantaneous water heaters for log cabins or static caravans in remote locations without a mains gas supply.

• A direct replacement for replacing older Morco or Forcali water heaters.

• Maximum power consumption is only 36 watts.
• Install in virtually any location in total safety – shower rooms, shepherd huts or a static caravan etc.

Dimensions for the SF14 tankless heaters

For warranty purposes and safety all of our lpg water heaters should be installed by a LPG qualified gas safe engineer.

Download the SF14 Low NOx gas fired water heater manual Flexiheat UK

Flue kit

The industry standard horizontal 60/100mm balanced flue kit.

or vertical flue kit option

Water heating with combustion sealed LPG water heaters

Should you require any more support, selection advice, or cost/quote on our room sealed LPG water heater range with flow rates, then please use the contact us form page on the website, or feel free to give us a call on 01202 822221.

Dual Fuel Boilers – Gas and Oil Fired

Dual Fuel Boilers – Natural gas or propane gas (LPG) and oil fired

Dual fuel boilers can keep a critical heating system operating, such as a hospital, for example, even if the primary fuel supply fails or is unavailable. They are often referred to as “dual fuel heating system”.

When it comes to hospitals and industrial operations or processes, where boilers provide heating hot water and/or domestic hot water, any loss of these vital processes can have a big effect on the health of patients and the bottom line of a company.

The other benefit is that a dual fuel boiler heating system allows you to swap your fuel depending on what’s the cheapest option. You have the choice to reduce your energy bills by using whatever is the cheapest option when using these heating systems, either as a short or long term solution.

Also, fuel security benefits: should there be an issue with supply problems of either gas or oil, you can simply swap over to what is available without having to buy a new boiler or new burner, which cuts down installation costs with a combined gas and oil boiler. You could even call dual fuel boilers a hybrid system or hybrid heating as such.

Why use a dual fuel boiler?

While most boiler installations have some form of backup system, normally in the form of additional boilers for the heating systems , in the event of a fuel loss rather than a boiler breakdown that interrupts vital heating system operations, a second boiler that utilises the same fuel will not offer any degree of redundancy to the boiler system.

Therefore, the requirement for a dual fuel system to eliminate this potential failure of a single fuel heating system or boiler system.

The dual fuel or dual energy boiler is better: if one fuel supply fails, the second quickly takes over, and your facility’s heating and hot water output are unlikely to be interrupted.

Changing from one energy source to another based on which is more economical for your dual fuel boiler is a great choice for property owners.

Where essential processes exist, a dual or multi fuel boiler that can use a consistent supply of natural gas in normal operation and convert to a secondary source of fuel (such as oil or LPG) if the natural gas supply fails provides a high level of redundancy.

Dual fuel heating system

The most popular dual fuel boilers are a combination of gas and oil. The gas side of the dual fuel burner can be natural gas, which is your mains traditional gas, or propane liquid gas, also known as LPG gas. With the oil for the dual energy boiler being gas oil (also known as red diesel and 35-second oil) or the new “HVO” oil replacement.

For any old or new boiler, annual servicing by a heating engineer is recommended to ensure that the central heating systems are operating effectively, efficiently, and ready for the colder months.

Dual fuel commercial boiler

All heating boilers from 70kW to 400kW have to be condensing to comply with the UK Part L building regulations (Conservation of fuel and power-standards for the energy performance of new and existing buildings) for commercial buildings, which have strict energy efficiency requirements to help reduce carbon emissions , whether they are an oil boiler or a gas boiler or LPG fired boilers. The single fuel type doesn’t matter-they all must comply with the regulations.

A dual fuel boiler at this kW output range must also comply with the efficiency requirements just because its dual fuel makes no difference.

Even though both gas an oil are ultimately fossil fuels and produce greenhouse gas emissions, the use of a condensing boiler reduces these fossil fuels impact to the lowest possible level as the highly efficient boiler system extracts the most energy from the fuel source.

Heating boiler range

Condensing boilers are the only option for fixed or permanent duel fuel boiler installation with outputs ranging from 70kW to 400kW.

Our condensing dual fuel boiler range has some unique advantages or benefits in that you can have two different temperature heating circuits from the boiler: one can be a low temperature heating system such as a 50/30c flow and return temperatures , and the other can be a higher temperature heating system with an 80/60C flow and low and return temperatures, which is ideal for heating an indirect hot water cylinder for your domestic hot water requirements.

You need higher temperatures from your heating boiler to be able to heat the domestic hot water up to 60°C. If your boiler can only produce one temperature and is being used on a low temperature heating system of 50 °C, for example, that temperature would not be enough for the heat exchanger in the hot water cylinder. Electric heating in the form of an immersion heater would be required in combination to increase the temperatures further in the installation and achieve the 60 degrees C required for a stored hot water system.

And electricity is an expensive energy source to use for a heating system.

Condensing boiler option – from 66 kW all the way up to 1,550 kW of output dependant on temperatures run

Condensing Boiler Option

We would always recommend our condensing boiler option for a few reasons

1. They are more energy efficient – 102% at full load 104% at part load in condensation mode
2. There is no lower limit on the return water temperatures
3. The combustion chamber and heat exchanger pipers are manufactured in stainless steel AISI 316L – this ensures long product life

Internal picture of our condensing commercial boiler with stainless steel wetted parts

But technically, after 400kW of output, you don’t have to have condensing to comply with the building regulations – they must, however, comply with the following efficiency levels – but very few boilers do if they are not condensing.

Part L building regulations efficiency requirements

We also supply another range, which can be used in temporary on non permanent boiler applications  – as they not require to meet the efficiency levels of Part L  as far as we understand, but please do your own due diligence.  

These boilers must always operate in forced circulation hot water systems and with a minimum return temperature of 55 °C. So, you need to use a shunt pump, which also provides an anti-condensation function for the boiler combustion chamber, installed between the flow and return connections, upstream on the heating systems with a 3- or 4-way mixing valve.

Dual fuel burner

At the heart of every dual fuel heating system is the burner.

Dual fuel burners give you the option of using gas (natural gas or propane) or oil as your energy source, depending on your business or operational needs.

The most popular dual fuel systems are natural gas and 35-second oil, which is also known as gas oil or red diesel . As such, you get two technologies or two burners in one installed unit.

Dual fuel burner – Gas and Oil

There are various options for your dual fuel burner-

• single stage burner option up to 232kW output-with high efficiency

• For large efficient heating system demands, 2 stage Hi-Low burner, 2 stage sliding or fully modulating dual fuel burner options are available on our dual fuel condensing boilers.
• Manual changeover as standard or automatic fuel changeover as an option for your dual fuel boiler

Multi-fuel burner standards

All our dual fuel burners conform to all the relevant CE legislation and quality standards where applicable –

• EMC Directive 2014/30/UE

• LVD Directive 2014/35/UE

• Directive MD 2006/42/CE-2006/42/EG-2006/42/EC

• PED Directive (Article 4, Section 3)2014/68/EU

• EN676 (gas)-EN267 (liquid fuel)-EN746-2 (industrial thermo processing equipment technologies) are the reference rules.

If you require any products support, heating solutions advice, check stock, delivery times or require a price on our dual fuel boilers or dual fuel heating system from Flexiheat UK, then please use the contact us form page on the website, or alternatively feel free to give our customer service team experts a call phone number 01202 822221.All rights reserved Flexiheat UK.