Bedrooms, living rooms, loft rooms and home offices. Compare quotes for standard or pre-charged systems from local installers.
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Standard or pre-charged systems
Home air conditioning in the UK is almost always a split system: a slim indoor unit high on the wall of each room and an outdoor unit outside, joined by pipework through the wall. It cools in summer, heats in winter and dehumidifies. A single room is usually fitted in a day by an F-Gas engineer, or by an electrician if you choose a pre-charged system.
Most homes start with one or two rooms that overheat. These are the most common.
The most requested room. A quiet unit with a sleep mode keeps the room cool through warm nights without the noise of a fan.
Larger, often sunny rooms. Usually 3.5 kW to 5 kW, sometimes two units in a long open-plan space.
Small rooms full of screens heat up fast. A small unit makes them usable all year.
Rooms under the roof get the hottest. Pipework is planned around eaves and dormers.
Cooking and glazing add heat, so these rooms often need a size up.
A multi-split serves several bedrooms from one outdoor unit, keeping the outside tidy.
Almost every home system is a split: an indoor unit for the room and an outdoor unit that moves the heat outside.
Wall-mounted splitThe most common choice. A slim unit high on the wall, joined to an outdoor unit. Available as standard or pre-charged.
Floor consoleSits low on the wall like a radiator. Useful under windows, in loft rooms with sloping ceilings or where wall space is short. Standard systems.
Multi-splitTwo to five indoor units on one outdoor unit. Standard systems only, fitted by an F-Gas engineer.
DuctedHidden in a ceiling void with grilles in each room. Best planned during a renovation. Standard systems.
Both types cool and heat. The right choice depends on how many rooms you want, where the outdoor unit can go and who will fit it.
| Standard installed | Pre-charged | |
|---|---|---|
| F-Gas engineer needed | Yes | No, for a typical install |
| Electrician needed | Yes | Yes |
| Rooms per outdoor unit | One or several | One |
| Pipe run | Longer runs possible | Limited to the supplied kit unless a technician extends it |
| Indoor unit styles | Wall, floor, cassette, ducted | Mostly wall-mounted |
| Cooling and heating | Yes | Yes |
| Best for | Whole homes, larger rooms, businesses | One room where the outdoor unit can sit close by |
Good siting makes the system quieter, more efficient and longer lasting:
ElectricsMost split systems need a dedicated circuit from the consumer unit. In England and Wales a new circuit is notifiable building work, so it must be done by a registered electrician or signed off by building control.
PlanningMany homes can fit an outdoor unit without a planning application, but size, position and noise matter, and listed buildings, conservation areas and flats often need consent. Rules differ between England and Wales.
Flats and leaseholdDrilling an outside wall or fixing a unit to it usually needs the freeholder's or managing agent's written permission first.
Neighbours and noiseChoose a quiet outdoor unit and site it thoughtfully. A good installer will advise on positions that keep noise away from neighbours.
Prices vary with the number of rooms, the system and the house. Comparing like-for-like quotes is the best guide.
System typeStandard or pre-charged, and wall-mounted, floor console, cassette or ducted indoor units.
Number of roomsOne room, or several rooms from a multi-split outdoor unit.
Unit sizeThe cooling and heating output each room needs, from about 2.5 kW to 7 kW and above.
Pipe run and wallsHow far apart the indoor and outdoor units are, and what the pipework passes through.
ElectricsWhether a new dedicated circuit is needed from your consumer unit, and how far it runs.
Access and positionUpstairs rooms, wall brackets or a ground stand for the outdoor unit, and access equipment.
Having these ready makes quotes accurate and easy to compare:
Home or business, how many rooms and the system type you would like.
Only installers who cover your postcode and fit your system type.
Weigh up prices, equipment and warranties, then choose, if you want to.
We don’t sell air conditioning and we don’t install it. We work for you, matching you only with vetted local installers who cover your area.
Vetted local installers contact you directly with free quotes for your rooms, so you can compare like for like.
There’s no obligation. Compare the quotes in your own time and go ahead only if one is right for you.
We don’t pass your enquiry to just anyone. Before an installer receives enquiries through us, we check three things.
We confirm public liability insurance is in place before any enquiry is passed on.
Standard systems must be fitted by an F-Gas certified engineer, as UK law requires, and the electrical work done by a qualified electrician.
Installations must be backed by a written warranty on the work, alongside the manufacturer’s warranty on the equipment, so you’re covered after the fitter leaves.
A single wall-mounted unit is usually fitted in a day. A multi-split serving several rooms can take two days or more, depending on pipe runs and access.
Modern indoor units are quiet, especially on low fan or sleep mode. The outdoor unit makes some noise, so site it away from bedrooms and neighbours' windows and ask installers for the stated sound levels.
Yes, with a standard multi-split system fitted by an F-Gas engineer. Pre-charged systems serve one room per outdoor unit.
Yes. Cooling removes moisture, and most units have a dry or dehumidify mode, which helps in muggy weather.
Split systems are normally hardwired on a dedicated circuit by a qualified electrician rather than plugged into a socket.
Clean the indoor filters every few weeks in heavy use, and have the system serviced as the manufacturer recommends, often once a year, to keep the warranty valid.
Yes, but you usually need the freeholder's or managing agent's permission to fix the outdoor unit or drill an outside wall. Where an outdoor unit cannot go, installers can advise on alternatives.
Enter your postcode, tell us about your rooms and choose a system type. Local installers who cover your area then send their quotes.
General information only, not technical, legal or planning advice. Installers confirm system size, siting and any permissions for your property. Updated October 2026.
Sources: The Fluorinated Greenhouse Gases Regulations (GB) and GOV.UK guidance on F-gas; Approved Document P (electrical safety) and the Building Regulations for England and Wales; the Energy Performance of Buildings Regulations (air conditioning inspections); manufacturer installation guidance for split systems.