New boiler?
Or a heat pump?
Before you replace that boiler, see the real numbers against an Octopus heat pump — their price after the £7,500 grant, on the Cosy tariff, with 0% finance over 10 years.
- Octopus heat-pump pricing
- On the Cosy tariff
- 0% finance over 10 years
- Free first check
Octopus heat pump
from £3,000
net of the £7,500 grant
Finance
0% APR
over 10 years
Owners rate their heat pumps highly
In a 2023 Nesta survey, heat-pump owners reported being highly satisfied — most wouldn’t go back to gas.
3.6 SCOP
Typical efficiency
3–4 units of heat per unit of electricity
£219
Avg saved last year*
Cosy heat-pump customers on the Cosy Octopus tariff
~85%
Less carbon than gas
Lower emissions than a gas boiler
15–20 yrs
Typical lifespan
UK government research; ~20 years on average
Figures from Octopus Energy, Nesta (May 2023), BRE independent testing and the MCS database. *Average saving for Octopus Cosy heat-pump customers on the Cosy Octopus tariff last year. Your own figures depend on your home, tariff and usage.
What we compare
Boiler vs Octopus heat pump — the honest numbers.
We pull your EPC to size both for your actual property, then put the upfront cost, the monthly cost and the total over time side by side — using Octopus’s pricing and tariff.
Octopus heat-pump pricing
Their installed price after the £7,500 Boiler Upgrade Scheme grant — typically well below the market average.
Running costs on the Cosy tariff
We model the heat pump on Octopus Cosy, where cheap off-peak windows bring the running cost below a gas boiler.
0% finance over 10 years
See the real monthly cost spread interest-free, next to a new boiler's, so you can compare like for like.
Total cost over time
Fit + running costs added up over 5, 10 or 15 years — with gas projected to rise faster than electricity.
How it works
Five minutes, no site visit.
Just your address
No floorplan needed. We pull your EPC to read your property type, size and current heating.
We price both options
A new boiler sized for your home, and an Octopus heat pump net of the grant — each with a monthly cost on 0% finance.
The difference, in black and white
Upfront, monthly and total over time, side by side. Take it or leave it — no pressure.
Boiler or Octopus heat pump? See the numbers.
Free first check. Five minutes. A clear cost comparison using Octopus pricing, the Cosy tariff and 0% finance.
Compare the costPre-survey indication only — not a quote. £7,500 Boiler Upgrade Scheme grant, England & Wales, subject to eligibility. Finance subject to status.