Short answer: Heat pumps are more efficient, more sustainable — and cheaper in the long run, especially with the £9,000 Boiler Upgrade Scheme (BUS).
While a new gas boiler may seem cheaper upfront, the total cost of ownership, energy use, maintenance, and emissions tell a different story.
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Heat Pump vs Gas Boiler Comparison Table
Feature |
Air Source Heat Pump |
Gas Boiler |
| Upfront Cost (after grant) | £3,000–£5,000 | £2,000–£3,000 Average Lifetime 15–20 years |
| 10–12 years Running Cost (per year) | £850–£1,100 | £1,400–£1,600 Grant Support Available |
| £9,000 (BUS) | None Efficiency | Up to 350% ~90% |
| Carbon Footprint | 0.8–1.2 tonnes/year | 2.5–3 tonnes/year |
| Grid Price Sensitivity | Low (mostly electric) | High |
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What Makes Heat Pumps Cheaper Over Time?
1. High Efficiency = Low Bills
Heat pumps generate up to 3.5 kWh of heat per 1 kWh of electricity used.
2. Grants Bring Down Cost
The BUS pays £9,000 toward air source heat pumps — covering a major chunk of install cost.
3. Longer Lifespan
A well-installed heat pump lasts 15–20 years with low maintenance.
4. Grid-Decarbonised Future
As the UK grid becomes greener, heat pumps will only get cheaper to run — gas won’t.
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Emissions Comparison
Appliance Tonnes of CO₂ / year
Gas Boiler ~2.6 tonnes
Heat Pump ~0.9 tonnes
Trees Needed to Offset 120+ vs 40
Convert CO₂ to Trees Saved
What About Compatibility?
Heat pumps work best in:
- Homes with decent insulation
- Homes with a hot water cylinder (or space for one)
- Radiators or underfloor heating designed for lower flow temps
Can I Keep My Radiators?
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What’s Included With a Heat Pump Installation?
- Outdoor unit
- Cylinder upgrade (if needed)
- System design
- Controls & thermostat
- Full MCS certification
- Grant application (we handle it)
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Are heat pumps noisy?
No. Most make less noise than a fridge. Outdoor unit only.
Do I need planning permission?
Not usually. Heat pumps are permitted development in most UK homes.
Is electricity more expensive than gas?
Per unit, yes — but heat pump efficiency offsets that completely.
Heat Pump vs Boiler? The Smart Choice Is Clear
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