Where to start
If you have not had a survey yet, start with the stages: they explain what each visit and document is for, so the rest makes sense. If you already have a quote in your hand, the checklist is the quickest way to see what is missing from it, and the cost planner puts its price next to the official median for the same size. If your boiler has just failed, read the breakdown guide first, because the choice it describes affects whether the grant is at risk. And if your home has storage heaters rather than radiators, the storage heater guide explains why your installation is a larger job than most.
Guides
- Replacing a gas boiler with a heat pumpWhat comes out, what goes in, hot water without a combi, and the gas supply.
- Installation prices, quarter by quarterThe official median price since late 2025, and how much weight a small change deserves.
- Where the outdoor unit can goThe Class G location rules, the sound check and the practical points that decide the spot.
- Electrics and the network operatorConnect and notify, or apply first: the two routes, and when the supply needs work.
- After a boiler breakdownThe normal route done quickly, or the retrospective route and its risk.
- Replacing storage heatersWhy electric homes need a whole wet system, and how the grant applies.
- Installation checklistEverything to gather, check and diary, stage by stage. Printable.
The installation, stage by stage
The main pages follow the order an installation happens in, from the survey through design and fitting to the handover.
- How a heat pump is installedThe four stages and the grant deadlines.
- The heat-loss surveyWhat it measures and how it sets the size.
- Installation cost and plannerOfficial medians by size; £12,826 for air source.
- Radiators and the cylinderWhat changes inside the house.
- Planning permissionThe Class G conditions in England.
- Ground source installationTrenches, boreholes and the six-month voucher.
- Commissioning and handoverThe switch-on and the papers to keep.
Reference
For quick definitions, see the glossary; for the common questions in one place, the installation questions page; and for how every price on this site is sourced, where the figures come from.