Homeowner guide
Choosing a heat pump installer is one of the most important decisions in the whole process.
Modern heat pumps from reputable manufacturers can all work well. What usually makes the bigger difference is the system design, the survey, the setup, and the installer’s ability to explain the choices clearly.
This guide explains what I would look for before accepting a quote.
Want a shortcut?
If you do not want to start from scratch, browse my recommended installer shortlist. Every installer there is included because I believe they are worth speaking to. The guide below explains the standards I would still encourage you to check before accepting any quote.
Why it matters
The installer and system design often matter more than the heat pump brand. Comfort, efficiency and running costs are shaped by design decisions made before the unit is fitted.
Poor surveys, poor commissioning or poor control setup can undermine good equipment. The goal is not to become a heating engineer. It is to know what good answers sound like.
Good practice
Training is not everything, but it is a good sign. Good installers keep learning beyond short minimum courses and understand hydronic design and low-temperature heating.
Monitoring data is useful. Flow temperatures, run hours, cycling, COP or SCOP can reveal how systems actually perform. Real outcomes matter more than marketing claims.
A good survey covers room requirements, radiator sizes, building fabric, pipework constraints, hot water use, electrical supply, outdoor unit location and noise.
Room-by-room heat loss matters. Defaults should be challenged, especially for extensions, awkward rooms, glazing, draughts and suspended floors.
The system needs enough flow around the heating circuit. Pipe sizing, pressure drop and the index circuit matter, and the installer should be able to explain their approach clearly.
Look for low flow temperatures where practical, weather compensation, sensible controls, avoided unnecessary zoning and clear trade-offs between cost, disruption and running cost.
Hot water is part of the design. Existing cylinder compatibility, coil sizing, recovery expectations and household habits all need to match real life.
Dirty systems can hurt performance and reliability. Ask about flushing, filters and water treatment because heat pumps need good flow rates and clean pipework.
Commissioning should include balancing, weather curve or control setup, heating and hot water settings, and explaining the controls to the homeowner.
Ask for recent customers and similar homes. Look at monitoring where available. Reviews are useful, but they should be one input, not the whole decision.
MCS is often required for grants such as the Boiler Upgrade Scheme. Consumer protection schemes such as RECC or HEIS may matter, but accreditation is a baseline, not proof of design excellence.
Checklist
Two or three good quotes is usually sensible. One quote makes comparison hard, while ten quotes is usually too many.
Serious design work takes time. Paid surveys are not automatically a bad sign, and can show that an installer takes design seriously.
Local installers may know common local housing types and local support can be easier. Some excellent specialists travel further.
National companies can offer process, scale and sharper pricing. The final decision should come down to confidence in the design, proposal and people.
Headline price only tells part of the story. Good design, survey work, commissioning and aftercare cost money.
Very cheap quotes may miss design detail, support or optimisation. Focus on long-term value, not just upfront cost.
Using the directory
Start by browsing the installer list, or use the regional pages if you want to narrow things down by area.
Read Mick’s notes, watch the interviews where available, check any customer offers and referral disclosures, then use the quote or contact routes where they are available.
This directory gives you a recommended shortlist rather than a random directory, but you should still do your own checks before accepting a quote. The installer’s work is their own, and any quote, contract, survey, design, installation, workmanship, aftercare or warranty is between you and the installer.
Final thought
The biggest difference usually comes down to how well the system is designed, installed and commissioned. Choosing the right installer is therefore one of the most important decisions you will make.
For more context on how this site handles referrals, customer offers and enquiry routes, read the disclaimer and privacy policy.
Further reading
These external guides and podcasts go deeper into heat pumps, tariffs and real-world home energy data.