Are Heat Pumps Worth It?
We install heat pumps for a living. Here's the honest answer.
For most UK homes, yes, especially with the £7,500 government grant covering the bulk of the upfront cost. But not for everyone, and not if they're installed badly. We'll walk you through the real numbers, when they make sense, when they don't, and what to watch out for.
Worth it if...
- You're on oil, LPG, or electric heating
- Your home has decent insulation (EPC D or above)
- You're replacing an ageing boiler anyway
- You want to future-proof against gas price rises
Maybe not if...
- You have a brand new A-rated gas boiler
- Your home is extremely poorly insulated (EPC F/G) without plans to improve
- You're planning to move within 2 years
Never worth it if...
- The installer doesn't do a proper heat loss calculation
- The system isn't commissioned correctly
- Weather compensation isn't set up
What does a heat pump actually cost to run?
| Scenario | Gas Boiler | Heat Pump | Annual Saving |
|---|---|---|---|
| 3-bed semi, decent insulation | £850/year | £520/year | £330/year |
| 4-bed detached, good insulation | £1,200/year | £680/year | £520/year |
| 3-bed replacing oil Best value | £1,600/year | £550/year | £1,050/year |
| 3-bed replacing LPG Best value | £1,800/year | £560/year | £1,240/year |
The biggest variable isn't the technology. It's the installation. A heat pump installed with the right flow temperatures, proper weather compensation, and correctly sized radiators will hit COP 3-4. A badly installed one might only manage COP 1.5-2, which wipes out the savings. This is why installer choice matters more than brand choice.
The £7,500 grant changes the maths
At Abode, we handle the entire grant application. You don't need to apply separately. We do it as part of the process. The grant is paid directly to us, so you only ever pay the net amount.
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How long until a heat pump pays for itself?
| Replacing | Net Cost After Grant | Annual Saving | Payback |
|---|---|---|---|
| Gas boiler | ~£4,500 | ~£330 | ~14 years |
| Oil boiler Best value | ~£4,500 | ~£1,050 | ~4 years |
| LPG boiler Best value | ~£4,500 | ~£1,240 | ~3.5 years |
| Electric heating Best value | ~£4,500 | ~£1,500+ | ~3 years |
If you're replacing gas, the payback on running costs alone is long. But factor in: no annual gas safety certificate needed, a 20-25 year lifespan vs 10-15 for a boiler, and rising gas prices, and the economics look very different over the life of the system. If you're on oil or LPG, it's a no-brainer.
The three things people get wrong about heat pumps
"Heat pumps don't work in cold weather"
RealityThey work down to -20°C. The UK rarely drops below -5°C. In Scandinavia, where it regularly hits -25°C, heat pumps outsell gas boilers. The "they don't work in the cold" myth comes from poorly installed systems with flow temperatures set too high.
"You need to rip out all your radiators"
RealityMost existing radiators work fine. Some may need upsizing. We check every one during the survey and only recommend changes where necessary. If you've got underfloor heating, even better. It's the ideal pairing.
"Heat pumps are noisy"
RealityA modern air source heat pump runs at 40-45dB. About the same as a fridge. You can have a normal conversation standing next to one. The noise complaints come from older units or units installed too close to bedroom windows without proper planning.
The uncomfortable truth about heat pump installations
Most heat pump complaints aren't about the technology. They're about the installation. A heat pump is only as good as the engineer who designs and installs it. Get the flow temperatures wrong, skip the heat loss calculation, or fail to set up weather compensation, and you'll have an expensive, underperforming system.
At Abode, every installation starts with a full heat loss calculation. Every radiator is checked. Every system is commissioned with weather compensation from day one. We don't subcontract. Our own engineers do every install.
Common questions
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