About iCOZi
As a leading supplier and installer of modern electric heating, including solar charged storage heaters, solar panels, solar with battery storage and thermal store hot water solutions, we offer a full range of modern energy efficient options for your electric heating, solar or hot water upgrade?
Electric Heating, hot water solutions & solar is in our DNA, and we understand how to utilise all the renewable products & electric heating options available supported by professional specification software and qualified installation engineers.
The right advice is vital when selecting new options to meet your needs including replacing old storage heaters with the correct products to avoid lowering your homes Energy Performance Certificate (EPC) rating. Our free technical survey and honest advice takes the guesswork away.
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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If your existing storage heaters are outdated, difficult to control or no longer suit the way you use your property, high heat retention storage heaters can provide a more flexible modern alternative.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
Why Choose iCOZi?
Find out how we can help you start saving today
Energy savings of up to 30%
Sustainable smart energy
Remote wi-fi control options
Fully qualified installation engineers
Friendly UK Customer Service
Full Range of Heating Options
Finance Options Available
Free No Obligation Survey
About iCOZi
If you are looking to replace old storage heaters, we have a range of energy efficient High Heat Retention (HHR) storage heaters which includes HHR PLUS storage heaters able to use surplus solar or wind energy to charge.
Offering more than just a single type of heating as a replacement option, we provide you with the most efficient electric heating for your home. iCozi electric heating options provide you with up to 100% efficiency and a smaller carbon footprint. The lower your energy use, the more environmentally friendly your home is.
iCozi is a leading supplier and installer of modern energy saving electric heating systems so there’s no need to compromise on choice, our extensive product range allows us to perfectly tailor your heating system for you.
How we make your home
COSY and EFFICIENT
Step 1
Enter your house and room details on our online form, along with your contact details
Step 2
We’ll be in touch to arrange a time and date to suit you, so one of our qualified engineers can carry out a technical survey for you
Step 3
We will send you a quote and finance options for installing the most efficient home heating system that suits you and your home
Step 4
We’ll call to discuss the survey results and if you wish to proceed we’ll arrange an installation day with you
Step 5
We’ll install your new heating system and go through any controls and settings with you
Step 6
Enjoy the warm and cosy feeling that comes with efficient electric heating!
Typical Examples:
Every home is different, so our free no obligation survey establishes what heating system best matches the home and the owners preferences.
See some examples here as a cost guide subject to survey.
Quality Products
iCozi use only premium quality products in our expanding ranges covering all types of electric heating, thermal water heating, solar panels, solar battery storage, air source heat pumps and EV chargers.
When using our services you can be sure that all products are of a very high standard and specified to suit your individual property, lifestyle and budget.
As an independent company we can offer a full range of electric heating and renewable products to suit and a tailored solution after discussion with every homeowner on what product mix is best suited for them now and to future proof their home.