Thinking about switching from gas? Here's the complete financial picture including installation costs, running costs, grants, and payback periods for Dorset homes.
Heat pumps cost more upfront but save money long-term. With up to £9,000 BUS grant, a heat pump costs just £500-£10,500 vs £2,500-£4,000 for a gas boiler. You'll save £400-£600/year on running costs, paying back the difference in 3-10 years. After that, it's pure savings for 15+ years.
Plus: You're future-proofed (gas boiler ban from 2035), reduce carbon emissions by 70%, and increase property value. For most Dorset homeowners, heat pumps are the smart long-term choice.
10-year total cost of ownership for a typical 4-bed Dorset home
Air Source (Most Common)
Combi Boiler (Most Common)
Heat pumps can cost the same or less over 10 years, while being more environmentally friendly and future-proof
Based on March 2026 energy prices (Electricity: 24.5p/kWh, Gas: 6.24p/kWh)
In this scenario, costs are nearly identical. However, heat pumps become significantly cheaper if:
If you have solar panels generating 40-60% of your electricity, heat pump running costs drop to £600-£950/year - making them significantly cheaper than gas boilers.
This is why we often recommend heat pumps + solar as the ultimate combination for energy independence.
| Factor | Heat Pump | Gas Boiler |
|---|---|---|
| Installation Cost (before grant) | £8,000-£18,000 | £2,500-£4,000 ⭐ |
| Installation Cost (after £7.5k grant) | £500-£10,500 | £2,500-£4,000 |
| Annual Running Cost | £800-£1,200 | £1,200-£1,800 |
| 10-Year Total Cost | £10k-£24.5k ⭐ | £15.7k-£23.5k |
| Carbon Emissions | 70% lower ⭐ | High |
| Installation Time | 2-3 days | 1 day ⭐ |
| Lifespan | 15-20 years ⭐ | 10-15 years |
| Future-Proof | Yes (gas ban 2035) ⭐ | No (banned 2035) |
| Grant Available | Up to £9,000 BUS grant ⭐ | None |
| Space Required | 1-2m² outdoor | Minimal ⭐ |
| Noise | 35-45dB (quiet) | Near silent ⭐ |
| Works with Solar | Excellent synergy ⭐ | No benefit |
| Property Value Impact | Increases (EPC) ⭐ | Neutral/Decreases |
⭐ = Advantage in this category
Equivalent to taking a car off the road for 12 months or planting 150 trees annually
With current energy prices (March 2026), heat pumps cost £800-£1,200/year vs gas boilers at £1,200-£1,800/year for a typical 4-bed Dorset home. Heat pumps save £400-£600 annually on running costs. However, if gas prices fall or electricity rises significantly, this advantage reduces. Heat pumps become increasingly cost-effective with solar panels.
New gas boiler: £2,500-£4,000 installed. Heat pump: £8,000-£18,000 installed, BUT £9,000 BUS grant available for off-grid properties makes the net cost £500-£10,500. With the grant, a heat pump costs £0-£7,000 more than a boiler. This premium pays back in 3-10 years through lower running costs.
Yes, absolutely. Heat pumps provide consistent heating and hot water year-round. They run at lower temperatures (35-55°C vs 65-75°C for boilers) but for longer periods, delivering the same comfort. Well-insulated Dorset homes with underfloor heating or correctly-sized radiators experience no difference in warmth.
Yes, but efficiency varies. Victorian homes with poor insulation may need system upgrades (better radiators/insulation) for optimal performance. However, high-temperature heat pumps (delivering 60-70°C) work with existing radiators. We assess your specific property during a free survey to determine the best approach.
From 2035, no new gas boilers will be installed in existing UK homes (new builds from 2025). If your boiler fails after 2035, heat pump will likely be your only option. Installing now means you avoid the 2035 rush, access current grants (may not exist later), and start saving immediately.
Get a free survey and personalized quote. We'll show you exactly how much you'll save with up to £9,000 grant (off-grid) and lower running costs.