High heat retention storage heaters: what they are and who they suit
By Dale @ ukaircontracker · facts checked
Quick answer
A high heat retention storage heater is a modern, heavily insulated storage heater that keeps most of its overnight charge until you need it, with a thermostat and automatic charge control. The definition used for UK energy schemes is a heater that still holds at least 45% of its stored heat 24 hours after charging ends. It suits homes with no gas supply on an off-peak tariff.
| Feature | Older storage heater | High heat retention |
|---|---|---|
| Controls | Manual input and output dials | Room thermostat, timer, automatic charge |
| Heat leakage | Leaks heat overnight and in the morning | Holds heat until it is called for |
| Running out by evening | Common | Less likely |
| Typical installed cost | Energy Saving Trust: £900 – £1,400 per room for storage heaters (all types) | Ask installers to quote the exact model |
Why retention matters
An old storage heater leaks heat from the moment charging stops, so rooms are warm while you sleep and cold by evening. Better insulation keeps the heat in the core, and the thermostat lets it out only when the room needs it. You buy the same night-rate electricity but use more of it while you are at home.
Grants
High heat retention storage heaters have been one of the measures funded under the Energy Company Obligation (ECO) for eligible households, usually those on certain benefits or in homes with poor energy ratings. Check with your energy supplier or local council what is available where you live.
Alternatives
If your home can take one, an air-to-air or air-to-water heat pump gives several units of heat for each unit of electricity. Storage heaters convert one unit of electricity into one unit of heat, so they rely on cheap off-peak rates to keep costs down.
Common questions
- What is a high heat retention storage heater?
- A modern storage heater that keeps at least 45% of its stored heat 24 hours after charging ends, with a thermostat and automatic charge control.
- Are high heat retention storage heaters cheaper to run?
- They waste less of the heat you pay for overnight, so you need less day-rate top-up heating. The electricity cost per kWh is the same.
- Can I get high heat retention storage heaters free?
- Some households qualify for funded upgrades under the Energy Company Obligation. Eligibility depends on income, benefits and the home's energy rating.