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If your existing storage heaters are outdated, difficult to control or no longer suit the way you use your property, high heat retention storage heaters can provide a more flexible modern alternative.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

RXE Dry Technology Electric Radiators

WR Eco Fluid WIFI Electric Radiators

BA Programmable Panel Heaters

BC Range of Electric Towel Rails

TE Sunamp Thermal Stores

MA Range of Electric Boilers
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.