Heat pumps are a long-term investment, so the company you choose matters as much as the unit itself. Here's what actually separates a reliable installer from the rest.
Written by the March Technology Technical Team · Last Updated: July 2026 · 6 min read
A heat pump is only as good as its installation, so before comparing brands or prices, it's worth checking the company itself. Look for certified, insured technicians rather than informal contractors, manufacturer training on the brands they install (not just "we can fit anything"), and a written warranty of at least 2 years on the installation itself, separate from the manufacturer's own warranty on the unit.
Just as important: does the company run a genuine free site survey before quoting, or just give a phone estimate? Hot water demand, plumbing and electrical compatibility all affect the real price, and a company willing to visit before quoting is usually more trustworthy than one that isn't. Finally, ask what happens after installation — is there a maintenance plan, and how fast do they respond to a repair call? Our own answers to these questions are covered throughout this site, including our installation cost guide and maintenance plans.
Check for: Certification, insurance and manufacturer training
Reasonable warranty: 2 years minimum on installation work
Always insist on: A free, in-person site survey before quoting
Ask about: Ongoing maintenance and repair response times
Whichever company you choose, we'd recommend getting at least one free site survey before committing — happy to provide one, no obligation.
Request a Free Site SurveyTell us about your property and needs, and one of our certified technicians will call you back with a personalised quote.
Look for certified, insured technicians with manufacturer training on the specific brands they install, rather than general contractors working outside their specialism.
Yes, it's reasonable to compare quotes, but make sure each one follows an actual site survey rather than a phone estimate — otherwise you're not comparing like for like.
A 2-year installation warranty is a reasonable minimum, in addition to whatever manufacturer warranty applies to the unit itself.
Hot water demand, existing plumbing and electrical compatibility all affect the real price and system sizing — a phone estimate can't account for any of that accurately.