Do installers need to be MCS?

For the BUS grant, yes — and it is the easiest way to confirm competence.

How many quotes should I get?

At least three, and make sure each includes a heat-loss assessment.

What questions should I ask?

Ask about MCS status, heat-loss survey, radiator upgrades, warranty and annual servicing.

How to Choose a Heat Pump Installer

The installer matters as much as the unit. A poorly designed system will cost more to run and feel colder — so vet carefully.

Last reviewed: August 2026Sources: MCS Certification · Boiler Upgrade Scheme (GOV.UK)

Insist on MCS certification

Only an MCS-certified installer can claim the £7,500 Boiler Upgrade Scheme grant and meets the quality standard. Check the MCS public register before you sign.

Ask about design, not just price

A good installer sizes the heat pump to your heat loss, not just your old boiler. Expect a room-by-room heat-loss assessment and a clear plan for radiators or underfloor heating.

Check warranty and aftercare

Look for a minimum 2-year workmanship warranty and a manufacturer parts warranty of 5 to 7 years. Ask who services it annually.

Get three written quotes

Compare design approach, not just headline price. The cheapest quote with no heat-loss survey is a red flag.

FAQs

Do installers need to be MCS?: For the BUS grant, yes — and it is the easiest way to confirm competence.
How many quotes should I get?: At least three, and make sure each includes a heat-loss assessment.
What questions should I ask?: Ask about MCS status, heat-loss survey, radiator upgrades, warranty and annual servicing.