Is It Usually Worth Replacing Storage Heaters With a Heat Pump?
Yes, replacing storage heaters with a heat pump is often worth it when you want lower running costs, better comfort control, and a more future-proof all-electric home. According to Ofgem’s 1 April 2026 price cap, electricity averages 24.5p/kWh, and Energy Saving Trust (2026) notes that air source heat pumps typically deliver a seasonal performance factor of roughly 2.8 to 3.5.
That difference in efficiency is the reason the economics often shift in favour of a heat pump, even before you factor in better controllability and the £7,500 BUS grant subject to eligibility. Storage heaters can still work, especially on off-peak tariffs, but many homeowners find the comfort and bill profile increasingly restrictive. For related context, compare our economy 7 with a heat pump guide, all-electric home running costs guide, and heat pump running costs article. If you want to see whether your home is suitable, start with our BUS grant survey page.
The right answer still depends on the building. A heat pump is not just a cheaper storage heater. It is a different heating model that works best when the home and emitters are surveyed properly.
Why Can a Heat Pump Be Cheaper Than Storage Heaters?
A heat pump can be cheaper than storage heaters because it moves heat instead of creating it directly from electricity. According to Energy Saving Trust (2026), this higher efficiency is what allows a heat pump to outperform most direct electric heating systems on annual running cost when the installation is well designed.
Storage heaters are still one-for-one electric resistance heaters in efficiency terms. Their economic advantage comes mainly from cheaper off-peak electricity, not from producing more heat from each unit bought. A heat pump, by contrast, can use electricity more efficiently across a broader range of hours if flow temperatures and controls are sensible.
That means the cost comparison should never be limited to tariff alone. The storage-heater argument starts with tariff timing, while the heat-pump argument starts with system efficiency.
How Big Can the Running-Cost Difference Be?
The running-cost difference can be meaningful because the same heat demand may require far less imported electricity from a heat pump than from storage heaters. According to Ofgem (April 2026), standard import electricity remains expensive enough that efficiency gains still matter even where the household uses some off-peak electricity.
| Heating option | Efficiency logic | Main cost driver | Typical bill risk |
|---|---|---|---|
| Storage heaters | 1 unit of electricity gives 1 unit of heat | Off-peak tariff quality | Medium to high |
| Panel heaters | 1 unit of electricity gives 1 unit of heat | Peak import cost | High |
| Air source heat pump | Several units of heat per unit of electricity | System design and tariff | Lower potential |
In many homes, the annual gain depends on how much heat the property needs, whether the current storage-heater setup is already optimised, and whether a heat pump can run at low temperatures without excessive remedial work.
When Do Storage Heaters Still Make Economic Sense?
Storage heaters can still make economic sense when the property is not heat-pump-ready, the occupants already use a strong off-peak tariff well, and the upgrade cost to a wet system would be disproportionate. According to Ofgem’s Economy 7 guidance (2026), off-peak structures still create a meaningful difference between night and day electricity use for some homes.
They can remain rational where:
- the existing system is relatively modern and reliable
- the property is small with modest heat demand
- the home cannot easily accommodate a heat-pump layout yet
- the owner wants a lower-capital short-term solution
The limitation is comfort and flexibility. Storage heaters can work economically in the right home, but they rarely give the same level of responsiveness or year-round efficiency as a properly designed heat pump.
What Upgrades Usually Matter Most Before Switching?
Before switching from storage heaters to a heat pump, the most important upgrades are usually heat-loss assessment, emitter strategy, and controls rather than blanket replacement of everything. According to Energy Saving Trust (2026), low-temperature systems work best when the home retains heat properly and the delivery system matches the design conditions.
In practice, the key checks are:
- whether the home needs radiator upgrades or fan emitters
- whether hot water should be added to the same system
- whether insulation work would materially improve efficiency
- whether the electrical setup supports the wider project
That is why a heat-pump survey matters. Many homeowners assume the answer is simply yes or no, but the real question is how much enabling work is needed to turn the economics into a good one.
What Does This Mean for London, Surrey, and TW Homes?
In London, Surrey, and the TW area, replacing storage heaters with a heat pump is often strongest in homes with persistent electric-heating bills and decent retrofit potential. According to Ofgem (April 2026), imported electricity remains expensive enough that improving heating efficiency can still create a meaningful cost shift in all-electric homes.
Flats and compact terraces in Richmond, Twickenham, or Putney need closer scrutiny because plant location, emitter space, and permissions can limit the design. Semis and detached homes in Sunbury, Hampton, Kingston, or Weybridge often create a cleaner route because space, layout, and cylinder options are usually more flexible.
That local point matters because a heat pump should be assessed as a building-level system, not just as a direct replacement for each storage heater on the wall.
What Should You Compare Before Replacing Storage Heaters?
Before replacing storage heaters, compare annual bills, tariff structure, required capital works, and how much better comfort and control matter to you. According to Energy Saving Trust (2026), the strongest decisions come from looking at both running-cost improvement and suitability rather than chasing one headline number.
Check these points first:
- current annual heating and hot-water spend
- off-peak tariff quality and how well you already use it
- likely radiator or emitter upgrades
- eligibility for the BUS grant subject to eligibility
- how long you expect to stay in the property
That comparison usually tells you whether the project is a near-term economic win or a staged upgrade that should happen later.
How Electromatic Can Help
Electromatic M&E Ltd helps homeowners compare storage heaters, off-peak electric heating, and properly designed heat-pump systems using real property constraints rather than generic assumptions. According to Ofgem (2026), the BUS grant is £7,500 subject to eligibility, and we can assess whether that changes the capital comparison enough to make the switch rational.
We work under MCS certification via our accredited umbrella partner, and we survey London, Surrey, and TW homes for full ASHP, solar, and battery upgrade paths where they make sense.
Call us: 07718 059 284 | Email: admin@electromatic.uk
Frequently Asked Questions
These are the questions homeowners ask most often when they move away from electric resistance heating. According to Energy Saving Trust (2026), the answer depends on building suitability, tariff structure, and how well the new system is designed.
How much cheaper is a heat pump than storage heaters?
It depends on your current tariff and heat demand, but the difference can be significant because a heat pump uses electricity more efficiently. The clearest savings usually appear in homes with high annual heating demand.
Can I replace storage heaters with a heat pump in a flat?
Sometimes yes, but flats need more careful review around plant location, permissions, noise, and hot-water layout. Suitability should be judged case by case.
Do I need radiators if I replace storage heaters with a heat pump?
Usually yes, unless another low-temperature heat-delivery system is planned. A heat pump generally needs a wet heating circuit or another appropriate emitter strategy.
How long does it take for the switch to pay back?
That depends on current bills, capital cost, and what enabling works are needed. Homes with very high electric-heating costs often have the clearest payback case.
Is it worth replacing storage heaters before they fail?
Often yes, especially if the house is a good heat-pump candidate and the current bills are already painful. Planned replacement is usually better than rushing a decision after a breakdown.
The information in this article is for general guidance only and does not constitute financial, legal, or technical advice. Energy savings estimates are based on typical UK household data from the Energy Saving Trust and Ofgem (April 2026 price cap). Actual savings depend on your property type, insulation levels, energy usage patterns, and electricity tariff. The Boiler Upgrade Scheme (BUS) grant of £7,500 is subject to eligibility criteria set by Ofgem — not all properties qualify. Electromatic M&E Ltd operates under MCS certification via an accredited umbrella partner. All installations comply with Building Regulations Part L and MCS standards. E&OE.
Written by Electromatic M&E Ltd — ASHP & Solar installer, London & Surrey (electromatic.uk)
Last updated: April 2026 | Electromatic M&E Ltd, Company No. 13837345
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