Gas Boilers vs Heat Pumps: The Full 2026 Comparison
Short answer
Heat pumps are the future-proof choice but gas boilers are cheaper now. Factor in the 2035 gas boiler ban before deciding.
Which suits you
Gas Boilers: Short-term budget installs
Heat Pumps: Long-term eco investment
Side by side
| Criteria | Gas Boilers | Heat Pumps |
|---|---|---|
| Upfront cost | £1,350–£6,134 | £6,181–£21,010 |
| Could save (est.) | up to £202/yr | up to £272/yr |
| Efficiency | 89% efficiency | 300%+ COP |
| Government grant | none | up to £7,500 |
| Carbon impact | Low carbon | Higher carbon |
| Installation time | 1–3 days | 1–2 days |
| Best for | Short-term budget installs | Long-term eco investment |
Which should you choose?
Heat pumps are the future-proof choice but gas boilers are cheaper now. Factor in the 2035 gas boiler ban before deciding.
If you’re primarily concerned with upfront cost, Heat Pumps (typically £7000–£15000) is generally the lower-cost option. If you want potentially lower running costs and a smaller carbon footprint long-term, Gas Boilers may offer better long-term value.
Gas Boilers: pros and cons
Where it wins
- 89% efficiency efficiency
- Could save up to £202 a year
- Lower carbon footprint
Where it struggles
- Higher upfront cost (£1500–£3500)
- Best suited to Short-term budget installs
- May need a property assessment first
Heat Pumps: pros and cons
Where it wins
- Lower upfront cost (£7000–£15000)
- Could save up to £272 a year
- Best suited to Long-term eco investment
Where it struggles
- 300%+ COP only
- Higher carbon emissions
- Less future-proof
Questions about gas boilers and heat pumps
Which is cheaper — gas boilers or heat pumps?
Which saves more money — gas boilers or heat pumps?
Which is more efficient — gas boilers or heat pumps?
Can I install both gas boilers and heat pumps?
Do both qualify for government grants?
Get quotes for either, or both
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