Electric multipoint water heaters
Electric Multipoint Water Heaters for Instant Hot Water
Electric multipoint water heaters are an excellent solution for supplying hot water to multiple points with an instantaneous water heater.Thus the term “multipoint instantaneous water heater”
Our multi-point electric water heaters have state-of-the-art heating technology, allowing for precise temperature regulation to provide personalised comfort. Typically, our units with a rating output of up to 27 kW come with digital displays and adjustable temperature settings for easy water temperature monitoring and adjustment.
This multipoint instantaneous water heater range is typically used in domestic and commercial applications such as shops, factories, student accommodation, etc., supplying hot water for one outlet or multiple outlets, depending on the flow rate of the shower or taps (sink taps for dishwashing, food preparation, etc. or toilet-type taps) being used.
What is an Instantaneous Electric Water Heater?
- An instantaneous electric water heater is a type of water heater that provides hot water on demand, without the need for a storage tank.
- It heats water instantly, using electricity, and supplies it to various points of use, such as sinks, showers, and basins depending on the flow rates required.
- Instantaneous electric water heaters are ideal for residential and commercial applications where water heating is required quickly and efficiently with energy savings compared to storage water heaters.
Benefits of Multipoint Water Heaters
- An electric multi point water heater,which is a tankless heater provides hot water on demand, eliminating the need for storage water heaters.
- Energy-efficient, as they only heat water when needed.This instantaneous water heater range all have a ErP “A” energy rating.
- Suitable for multiple points of use, such as sinks, showers, and basins or to provide instant hot water for an appliance such as a dishwasher or washing machine.
- Compact design, ideal for small spaces or remote areas for point of use such as a sink or shower that require instant hot water.
- These multipoint electric water heaters can be used in commercial water heating settings, such as offices, restaurants,student accommodation and hotels.
Key features to consider for instantaneous electric water heating
- Look for an instantaneous water heater with a suitable power rating (the kW rating) to meet your hot water needs.
- Safety features: Ensure the multipoint hot water heater has features such as a high temperature cut out, which is a safety cut out.
- Multiple points: Consider a water heater that can supply hot water to multiple hot water outlets / points of use.
- Check the flow rate of the water heater to ensure it meets your hot water needs.
Choosing the Right Size and Type
Consider the number of points of use and the flow rate required.
Choose a water heater with a suitable power rating (in kW) to meet your instant hot water needs.
Overview of the product, including its features and benefits.
Review of the product’s performance, including its flow rate at your required water temperature increases , the maximum water temperature it can produce, and energy efficiency.
Flow rates for hot water fixtures
Standard shower head: 7 to 8 litres per minute flow rate
Standard shower head 7 to 8 litres a minute of flow @ 40C
A standard shower head requires 7 or 8 litres of hot water per minute, whereas European Water Label “green band” water-saving shower heads require 6 litres per minute. Think of this standard as an “ErP” rating for bathroom products, taps, etc.
Kitchen sink taps: 4 to 6 litres per minute
The “spray taps” for basins and sinks range in capacity from 2 to 4 litres per minute.
Be careful to check the flow rates on your spray taps, as all our instantaneous water heater units require a minimum flow of 2.5 litres per minute to operate.
Modern bath mixer taps have an approximate demand rate of 12 litres per minute.
Please note:
Please be aware that drench showers can have massive flow requirements, ranging from 15 litres to pretty much any flow rate; 30 litres per minute for a drench type shower is not uncommon. For these water heating applications,a large instantaneous water heater will be required or even a direct storage unvented DHW cylinder due to the high volume of water required to feed this type of shower
Product range
These instant water heaters feature four power ratings or output ranges in a single unit. The 27kW and 36kW electric multipoint water heater, on the other hand, only offers a single power setting.
For instance, you can choose between the 17kW, 18kW, 21kW, or 24kW power outputs on our 17kW to 24kW instantaneous water heater.
This affects the draw-off point flow rate; therefore, at 17 kW, it will produce 8.1 litres; at 24 kW, it will produce 11.6 litres a minute, at the standard temperature rise of 30 °C, for daily use in the winter period, as that’s when you want hot water the most, as you can see in the following data table.
| Power output of the instantaneous water heater | 9kW to 15kW power rating | 17kW to 24kW power rating | 27kW | 36kW |
| Energy efficiency class | A | A | A | A |
| Heat capacity ( power setting options) | 9/11/12/15 kW | 17/18/21/24 kW | 27 kW | 36kW |
| Electrical supply – All require a 3 Phase power supply | 400V 3N~ | 400V 3N~ | 400V 3N~ | 400V 3N~ |
| Mains water supply pressure (Bar) min – maximum | 1 to 10 | 1 to 10 | 1 to 10 | 1 to 6 |
| Hot water flow rate at Δt=30 in litres per minute | 4.3/5.2/5.8/7.2 | 8.1/8.7/10.1/11.6 | 13 | 17.3 |
| Rated current (Amps) | 3×13/15.9/17.3/21.7 | 3×24.6/26/30.3/34.6 | 3 x 39 | 3 x 39.9 |
| Dimensions – W x D x H (in mm) | 245 x 126 x 440 | 245 x 126 x 440 | 245 x 126 x 440 | 315 x 140 x 492 |
Please note that our instantaneous water heater range requires a minimum flow rate of 2.5 l/min to start heating the water. They will not operate if the flow is lower than this point.
For a given kW output from the hot water heater – as the water temperature increases, the flow rate decreases is the basic rule of physics.
The 9kW to 27kW have a digital display
The digital display on our 9kW to 27kW instantaneous water heater range
Download the 9kW to 27kW multipoint instantaneous water heater range manual
and our 36kW unit has a tradtional temperature dial
36 kW Electric instant water heater – with a manual temperature control dial
Download the 36kW Electric multipoint instantaneous water heater manual
Installation and safety considerations
- Make sure a qualified electrician installs the water heater.
- Follow the manufacturer’s installation guides and instructions to ensure the warranty.
- Ensure the instantaneous water heater is located (wall mounted) in an area with adequate space to service or inspect the water heater and as close as possible to the water outlets being served.
- The water heater must not be installed in a site that is exposed to the danger of an explosion and where the temperature might drop below zero C, as the water in the heater will freeze and damage the water heater, which will invalidate the warranty.
- Check the water heater’s safety features, such as the high temperature cut out i.e., a safety cut out to prevent overheating.
- No pressure relief valve is generally required on an instantaneous water heater unless the water pressure can get above the 10 bar the 9kW to 27kW models are rated for.The 36kW water heater is rated to a maximum water pressure of 6 bar.
- No Expansion vessel is required for an instantaneous water heater, as they supply instant hot water there is no hot water storage to account for unlike tank-type water heaters.
Energy Efficiency and Running Costs
Instantaneous electric water heaters are energy-efficient, as they only heat water when needed.
Look for a water heater with a high energy efficiency rating- Our electric multipoint instantaneous water heaters have an “A” energy rating.
Consider the running costs of the water heater, including electricity consumption and maintenance costs.
Contact us
Should you require further assistance, check stock (we normally have the units on the shelf for the next working day delivery or express delivery times i.e. timed, weekend etc), or get prices on our energy-efficient and cost-effective electric multipoint water heaters with accurate factory fitted temperature control and , then please don’t hesitate to call our sales team on 01202 822221 or click here for our email contact form.
