Air Conditioning Cost Calculator UK

How this calculator works

This calculator combines your system type with realistic 2026 UK supply-and-fit pricing, then applies a regional labour multiplier. Low and high reflect a ±15% spread around the mid estimate; a real quote follows a site survey.

What changes an air conditioning quote

The unit and system type set the baseline, but the on-site work is where two quotes for the same rooms diverge. The biggest swing factors are the pipe-run length between each indoor head and the outdoor condenser, whether that condenser sits at ground level or needs a first-floor bracket or roof mount, brick versus stud-wall penetrations, and any consumer-unit or dedicated-circuit electrical work. A short, tidy run to a nearby ground-level condenser sits at the low end of each cost band; a long concealed run that needs scaffolding pushes you toward the high end.

Running cost matters as much as the fitted price. A modern A+++ split runs as an air-to-air heat pump with a seasonal efficiency far above a plug-in cooler, so sizing the unit correctly to the room avoids paying to run capacity you never use. Our kW / BTU sizing calculator gives you a starting size, and the running costs guide covers typical pence-per-hour figures. If you also want efficient winter heating from the same system, compare air conditioning against a heat pump.

Any install that adds, tops up or moves refrigerant must legally be carried out by an F-Gas certified engineer in the UK — it is a legal requirement, not a preference, and using an uncertified fitter can void your warranty. Every engineer we match you with is vetted and F-Gas certified (you can check any company on the REFCOM register). Check whether your external unit falls under permitted development or needs planning permission before work begins. R32 is now standard on new domestic splits; if you are replacing an ageing R410A system, expect a full unit swap rather than a top-up, because the older refrigerant is increasingly scarce and expensive.