Broad guide
The air-to-air guide explains the system before price comparisons.
Cost guide
Air to air heat pumps cost UK
Energy Saving Trust says a typical air to air heat pump can cost about £1,900 for one room and around £3,700 for a three-bed semi-detached home. The real installed price still moves with indoor units, electrical work, route length, and access.
For eligible residential jobs, GOV.UK now lists a £2,500 Boiler Upgrade Scheme grant for air-to-air heat pumps. That changes the net price, not the survey work needed to quote it cleanly. · 4 min read
Related guides
Air-to-air cost, system choice, and running-cost guides
System comparison
Air source heat pump vs air-to-air compares which route fits the property better.
Running-cost context
Use cost of electricity in UK and ASHP running costs UK when the cost discussion needs tariff context as well as install price.
Current benchmarks
Typical air to air heat pumps cost in the UK
Single room
Energy Saving Trust says a system to heat one room typically costs about £1,900. That is a useful benchmark for a simpler split-system job, not a universal quote.
Three-bed semi
The same guide gives around £3,700 for a three-bedroom semi-detached home. That reflects a broader domestic system with more than one indoor unit and a bigger install scope.
What is included
These are public market benchmarks, not a fixed national tariff. Redecoration, awkward access, added electrical work, or hot-water changes can all move the real number.
Source checked on 27 May 2026: Energy Saving Trust air-to-air heat pumps. The cost figures above are taken from that guide.
Price drivers
What usually changes the final installed price
Indoor units
The number of rooms being covered matters fast. More indoor units, longer refrigerant runs, and more wall penetrations usually move the quote more than the headline outdoor unit does.
Electrical work
Consumer-unit context, isolators, cable routes, and practical installation constraints can add real cost. This is one of the biggest reasons a quick verbal price often ends up wrong.
Access and making-good
Awkward unit positions, condensate routes, scaffold needs, and redecoration can all change the final installed price. That is why a usable site record matters before anyone treats the benchmark as a firm quote.
Grant effect
What the £2,500 grant actually changes
Current position
GOV.UK now lists £2,500 towards an air-to-air heat pump. The approved grant categories and values are effective from 28 April 2026.
What it does
The grant changes the net installed price for eligible jobs. It does not change the need to confirm indoor unit locations, noise-sensitive siting, route lengths, and electrical reality before the quote goes out.
Best practical use
Treat the grant as a real current benchmark, then price the actual job from the site conditions. That is the difference between a marketing number and a quote that survives the survey.
Sources checked on 27 May 2026: GOV.UK Boiler Upgrade Scheme, GOV.UK approved grant categories, and Energy Saving Trust air-to-air heat pumps. The pricing interpretation above is an inference from those public benchmarks plus normal installation variables.
FAQ
Air to air heat pumps cost UK FAQ
Typical price
What is the quick cost answer?
A sensible public benchmark is about £1,900 for one room and around £3,700 for a three-bed semi, but real installs move with scope and site constraints.
Main price driver
What this means the quote most?
The number of indoor units, electrical work, route length, access, and making-good usually change the quote more than the headline outdoor unit does.
Grant effect
What does the grant actually change?
For eligible routes it changes the net price, not the need to confirm layout, electrical context, and practical installation detail before treating a benchmark as a real quote.