Smarter, More Efficient Storage Heating
Older storage heaters were designed to charge overnight and release heat slowly throughout the day, but they often lacked precision. Many lost heat too quickly, provided warmth when it wasn’t needed, and left rooms cold by the evening. They used to be bulky, dicult to control, and expensive to run by today’s standards.
Modern storage heaters solve these problems with advanced technology and smarter design. They use improved insulation to retain heat for longer, ensuring warmth is available when you need it. High Heat Retention storage heaters are also up to 30% more ecient than the old models. Built-in digital controls and accurate thermostats allow you to set accurate temperatures, manage heating times, and reduce wasted energy. All our smart storage heaters include adaptive learning features that predict daily heating needs based on usage patterns and weather conditions.
Lower Running Costs with Modern Storage Heaters
Upgrading to modern storage heaters can significantly reduce running costs, especially for properties on Economy 7 or similar o-peak electricity taris. By charging more efficiently overnight and releasing heat in a controlled way, modern units make better use of cheaper electricity while maintaining consistent comfort throughout the day. We also oer Solar Storage Heaters for increased energy savings to further future proof your home.
Maximum Heat Retention
High Heat Retention Storage Heaters are required to store 45% of unused heat over 24 hours. Our heaters achieve more than this, and store 51%, meaning they are one of the most effective storage heaters on the market.
There are also clear comfort and aesthetic benefits. Modern storage heaters are slimmer, quieter, and more visually appealing than older models. High Heat Retention storage heaters also include an integral heating element, providing instant top up heat when required without relying solely on stored energy.
Replacing outdated storage heaters is not just an upgrade—it’s an investment in energy eciency, lower bills, and improved day-to-day comfort. For homeowners and landlords alike, modern storage heaters oer a reliable, future-ready heating solution for electrically heated properties.
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Our Product Ranges

High Heat Retention Storage Heaters
If your existing storage heaters are outdated, difficult to control or no longer suit the way you use your property, high heat retention storage heaters can provide a more flexible modern alternative.
iCozi supplies and installs Elnur HHR plus high heat retention storage heaters for electrically heated properties across Mainland UK.
A complete service from survey to installation
We don't simply supply the heaters and leave you to arrange the rest. Our service includes:
- Free, no-obligation survey – we assess your existing heating, rooms and property requirements.
- Heat-loss calculation – we calculate the heating requirement to help determine the appropriate heater sizes.
- Electrical assessment – we check the existing electrical arrangements as part of the proposed installation.
- Solar PV assessment – if you have solar panels, we can add a solar control unit so the heaters can use surplus generation.
- Supply and installation – we supply the appropriate HHR plus heaters and install them using qualified electrical engineers approved by iCozi.
- iCozi is an Alcumus Approved Safe Contractor.
- Programming and setup – we programme the system and help you understand the controls and app.
- Post-installation telephone support – we're available by telephone if you need help after installation.
Better control of stored heat
High heat retention storage heaters are designed to retain stored heat for longer and give you greater control over when heat is released compared with older storage heaters.
High heat retention storage heaters are required to store 45% of unused heat over 24 hours. Elnur states that its heaters store 51%.
HHR plus heaters can work with Economy 7, Economy 10 and some smart or time-of-use tariffs.
Which storage heater do I need?
HHR plus heaters can be controlled by WIFI and can use surplus solar energy with separate control boxes.
Four models are available with heat outputs of: 270W · 550W · 820W · 1,100W
The right size depends on factors including the room and its heat-loss characteristics. Your electricity tariff, meter setup and how you use your heating can also affect the most suitable arrangement.
That's why we carry out a heat-loss calculation before recommending which heaters are suitable.
Is high heat retention heating suitable for my property?
Our HHR storage heaters are suitable for a range of electrically heated properties, including houses, flats, residential properties, social housing, commercial premises and retirement living properties.
Frequently asked questionsDo I need solar PV? No. HHR plus heaters can be installed with or without solar PV.
Can I replace my existing storage heaters? Yes. We can assess your existing heating and property as part of the free survey.
How much will installation cost? The cost depends on the heater sizes required, number of heaters, electrical installation and property requirements. We'll provide a quotation following the survey.
Where does iCozi install? We serve Mainland UK — England, Scotland and Wales.
Arrange your free survey
The best way to find out whether high heat retention storage heaters are suitable for your property is to use our Free Survey Service.
Call us on 0800 048 9301 or the Contact Us link below to Arrange a Free Survey.
SSH WIFI Smart Storage Heaters
- Turning heating on or off
- Raising or lowering the temperature
- Adjusting the temperature in a specific room
- Changing the heating operating mode
- Free, no-obligation site survey
- Heat-loss calculation to help determine the heating requirements
- Removal and disposal of your existing storage heaters
- Supply and installation of the new Elnur PROSSH heaters
- Programming and setup
- Post-installation telephone support at no additional charge
- Arrange your free survey
- We assess your heating requirements
- Receive your quotation
- Installation and setup
- Ongoing telephone support

RXE Dry Fluid Free Electric Radiators
- Free, no-obligation technical survey
- Heat-loss calculation for your property
- Advice on the suitability and requirements of the heating system
- Supply of Elnur RXE PLUS radiators
- Installation by qualified electrical heating engineers
- Programming of the radiators
- Post-installation telephone support if required
- Comfort – for your normal required room temperature
- Economy – for reduced heating requirements
- Frost Protection – to help protect against very low temperatures

RDW Eco Fluid WIFI Electric Radiators
An alternative controllable electric heating system when looking to replace storage old heaters.
The Elnur RDW Eco Fluid Wi-Fi electric radiator combines a slim, modern design with precise electronic temperature control and programmable heating. iCozi supplies and installs these radiators throughout mainland UK, providing a complete service from your initial survey through to installation, programming and post-installation support.
Start with a free, no-obligation survey
Replacing storage heaters with electric radiators is not simply a case of choosing a radiator and installing it in the same position.
We start with a free, no-obligation site survey and heat-loss calculation to assess your property's heating requirements and help determine the appropriate radiator sizes and installation requirements.
This is particularly important when replacing storage heaters, as changing the heating system can affect a property's Energy Performance Certificate (EPC). Our survey allows us to consider the property and proposed heating requirements before providing a quotation.
We cover mainland UK.
Why choose Elnur RDW Eco Fluid Wi-Fi radiators?
The RDW Eco Fluid range is designed to provide controllable electric heating in a slim, discreet format.
Key features include:
- Wi-Fi capability for convenient control when used with the optional Elnur G Control Box
- Precise electronic thermostatic control
- A slim design of approximately 8cm deep
- An integral programmer for managing your heating
- Three temperature settings: Comfort, Economy and Frost
- The ability to adjust heating to suit your preferences and routine
- Control via the Elnur app, available for iOS and Android, when the optional G Control Box is installed
The combination of programmable controls and optional app-based control gives you greater flexibility over how you manage your electric heating.
A complete supply and installation service from iCozi
With iCozi, you don't need to arrange the survey, heating calculations, radiator installation and programming separately.
Our service includes:
1. Free, no-obligation survey We assess your property and discuss your heating requirements.
2. Heat-loss calculation We calculate the heating requirement to help determine the appropriate radiator sizes.
3. Quotation We provide a quotation based on the requirements identified during the survey. Any additional electrical work identified as necessary will be included in the quotation.
4. Supply and installation Your Elnur RDW Eco Fluid Wi-Fi radiators are supplied and installed by our qualified electrical heating engineers.
5. Programming We programme the radiators and controls as part of the installation.
6. Post-installation support If you need assistance after your installation, iCozi provides telephone support.
iCozi is also an Alcumus Safe Contractor approved contractor.
Replacing old storage heaters?
The Elnur RDW Eco Fluid Wi-Fi radiators can be used as a replacement for old storage heaters, but it is important to assess the property before making the change.
Storage heaters and other electric heating systems operate differently, and replacing storage heaters with radiators can potentially have an impact on a property's EPC.
That's why we recommend starting with our free survey and heat-loss calculation. We can assess the property and heating requirements before you decide how to proceed.
Can the radiators be controlled remotely?
Yes. The Elnur G Control Box is available as an optional extra and allows the compatible radiators to be controlled remotely through the Elnur app.
The app is available for iOS and Android, allowing you to manage your heating when you have an internet connection.
If remote control isn't something you need, the radiators can also be operated using their built-in controls and programmer.
Do I need additional electrical work?
Normally in most installations, no particular additional electrical work is required.
Any additional work needed will be identified during the site survey and included in our quotation before the installation goes ahead.
How much does installation cost?
Supply and installation prices shown on our website exclude VAT and are subject to the results of our technical site survey.
The final price can vary depending on the requirements of your property and the number of radiators being installed. Any applicable multi-heater installation discounts will be reflected in the quotation where appropriate.
For an accurate price for your property, the best place to start is with our free, no-obligation survey.
Frequently asked questions
Are Elnur RDW Eco Fluid radiators suitable for replacing storage heaters?They can be used to replace old storage heaters, but we recommend a property survey and heat-loss calculation before deciding on a replacement system. Changing from storage heaters to electric radiators can affect a property's EPC.
Do the radiators have Wi-Fi?The RDW Eco Fluid radiators can be used with the optional Elnur G Control Box for remote control through the free Elnur app.
Is the Elnur app available on iPhone and Android?Yes. The Elnur app is currently available for both iOS and Android.
Is the G Control Box included?No. The G Control Box is an optional extra.
Do you provide installation?Yes. iCozi provides a complete supply and installation service, including the survey, heat-loss calculation, installation, programming and post-installation telephone support.
Where do you install Elnur RDW Eco Fluid radiators?We provide our survey and installation service throughout mainland UK.
Do I need a dedicated circuit or consumer-unit upgrade?Normally, no particular additional electrical work is required. If any additional work is necessary, it will be identified during the survey and included in your quotation.
Do I have to commit to an installation after the survey?No. The survey is free and no-obligation, so you can consider the quotation before deciding whether to proceed.
Arrange your free surveyIf you're considering replacing old storage heaters with Elnur RDW Eco Fluid Wi-Fi electric radiators, let us assess your property and heating requirements first.
Call iCozi on 0800 048 9301 or use the Contact Us link below to arrange your free, no-obligation survey.
We can then carry out the heat-loss calculation, discuss your requirements and provide a quotation for your proposed installation.
BA Programmable Panel Heaters
- Bedrooms
- Kitchens
- Home offices
- Other rooms where heating is required intermittently

BC Range of Electric Towel Rails
- Free, no-obligation initial survey
- Heat-loss calculation as part of the installation survey
- Specification of the appropriate towel rail
- Supply of the Elnur towel rail
- Installation by qualified electrical heating engineers
- Programming of the towel rail
- Post-installation telephone support if required

TE Sunamp Thermal Stores
- 70L (70 ePlus)
- 150L (150 ePlus)
- 210L (210 ePlus)
- 300L (300 ePlus)
- Free, no-obligation survey
- Heat-loss calculation
- Thermino specification
- Professional installation
- Programming
- Post-installation telephone support

MA Range of Electric Boilers
- MAC15 electric combination boiler – provides central heating and domestic hot water.
- MAS15 electric system boiler – provides central heating only, with domestic hot water provided separately.
- Suitable for single-phase or three-phase supplies
- 3–15kW rated range on three-phase supplies
- Up to 12 litres per minute flow rate
- Integral 50-litre hot-water store
- User-adjustable hot-water temperature regulation
- Automatic power modulation to match heating demand
- Silent TRIAC power switches
- Integral expansion vessel, circulating pump and automatic air vent
- Stainless-steel-shielded INCOLOY 800 heating elements for high-temperature strength and resistance to corrosion
- Digital display with user-adjustable controls
- Key-lock facility
- Wall-mounted design
- Wall-mounted electric system boiler
- Designed for central heating only
- Insulated steel construction
- Stainless-steel-shielded INCOLOY 800 heating elements
- Smart Electronic Modulating System (SEM) for electronic modulation of the heater
- Digital display
- Circulating pump
- Silent TRIAC power switches
- Heating temperature limiter up to 100°C
- Integral 6-litre heating expansion vessel
- 0–4 bar hydrometer
- Automatic air vent
- Heating flow detector
- 7 bar heating pressure relief valve
- Steel wall bracket/template to help set up connections
- Compatible with underfloor heating
Electric boilers and hot water solutions.
Most UK homes have a gas boiler and are connected to the mains gas network, and this currently remains the most cost efficient way to heat your home and hot water. Gas boilers are reliable as well if maintained and serviced properly.
Other gas boilers powered by LPG or oil are not as cost effective and an electric boiler for heating or an electric combi boiler to give heating and hot water can then be a viable and clean fuel alternative. There are also new alternative electric hot water solutions such as the Sunamp thermal store which with its compact design and cutting edge technology is a superbly efficient electric hot water solution.
Greener Heating
Our survey engineers can go through all the options with you, so you have a full understanding of the merits of each product. We choose not to oer air source heat pumps due to their high installation and running costs. Going electric can be a much greener option as electric boilers are almost 100% ecient. Current gas and oil boilers are closer to 90-94%, while electric units are 99.9%.so not as many CO2 emissions are created, compared to a gas boiler which contributes directly to fossil fuels and your carbon footprint. With fuel and CO2 emissions now a huge topic for us all and for government, electric boilers and renewable energy sources such as solar storage heaters are increasing in popularity in an attempt for the UK to become carbon neutral.
Frequently Asked Questions
Is battery storage suitable for everyone?
Is battery storage worth it if I have an electric car?
Can I charge a battery from the electricity grid?