Whole-house air conditioning
By Airva Editorial Team · Checked against published UK guidance · Updated
Yes — a whole house can be air conditioned, bringing comfortable temperatures and, with a reversible system, efficient heating to every room rather than one space at a time. The key difference from single-room work is that a whole-home system is a designed installation: it needs a room-by-room look at cooling loads, outdoor-unit positions and pipe routes, so it rewards planning far more than a one-off split does.
Two common approaches
There is no single "whole-house" product — it is usually one of two architectures, and which suits you depends mostly on whether you are retrofitting or renovating.
| Multi-split — several indoor units, one or two outdoor units | Good fit | Flexible, widely used, and installable in an occupied home room by room. |
| Ducted — concealed ductwork, discreet grilles | Consider | Keeps walls clear, but is best planned into a renovation or larger project. |
| Space for outdoor units and pipe routes | Consider | More rooms means more capacity and more routing to plan and site. |
| Occupied home, no building work planned | Consider | Achievable with multi-split; a survey confirms the least disruptive layout. |
Multi-split vs ducted
A multi-split system runs several indoor units from one or two outdoor units, each room controlled independently — the usual retrofit route for a whole home. A ducted system hides the equipment above ceilings and delivers air through discreet grilles, keeping walls clear, but it needs the ceiling voids and access that a renovation provides.
At a glance
- Multi-split for occupied homes: wall-mounted indoor units, small pipe runs, minimal disruption, so it suits retrofit work in a house you're still living in.
- Ducted for renovations: hidden grilles and ductwork above ceilings, which needs ceiling access, making it a renovation or new-build choice.
- How many outdoor units: one outdoor unit can often serve several multi-split indoor heads; larger properties may need a second unit, or a single ducted condenser feeding one floor's grilles.
- Whole-house capacity follows the room-by-room heat load, not the floor area alone.
Planning a whole-home system
Expect a higher investment than single-room work, and a survey that treats the house as a whole rather than a sum of separate rooms. That means agreeing outdoor-unit positions, pipe routes and how the work is staged if you are living there throughout. Our system finder gives a preliminary steer before an installer designs the detail on site.
Typical installation timeline
Most multi-room jobs run from a few days to around two weeks, depending on room count, pipe routes and whether ductwork is involved. Installers normally stage the work floor by floor or room by room, commissioning each area before moving on, so living in the house during work is straightforward. The same staging applies to a commercial air conditioning installation, where trading hours matter.
Likely costs
Whole-house cost is driven by the number of rooms and indoor units, the system type (multi-split or ducted), the number of outdoor units and the routing throughout the property.
Indicative price ranges
Whole house air conditioning cost tracks room count and heat load more closely than floor area. A multi-split with four or five indoor units sits well above the band for a single room, and a ducted system usually costs more again once ductwork, builder's work and making good the ceilings are priced in. Those are installation figures only. Electricity use, hours of operation and the efficiency rating of the kit sit separately as ongoing running costs, where an inverter-driven compressor that modulates its output uses less energy than fixed-speed equipment holding the same temperature — compare SEER and SCOP on the energy label rather than any headline percentage. Feed your own room list into the estimator above for a closer figure.
Planning and installation
For most homes the outdoor units can be fitted under permitted development in England, subject to conditions on size, siting and noise — and with several units the combined arrangement is worth checking, along with the tighter rules for listed buildings, conservation areas and units facing a road. Confirm your situation with the Planning Portal [1] or your local planning authority, and use an F-gas certified installer for the refrigerant work.
To get a whole home designed and sized properly, request an installer match.
Common questions
How much does whole house air conditioning cost in the UK?
Home air conditioning UK cost depends on how many rooms you treat and which system you choose: multi-split sits lower, ducted higher once concealment work is added. Running costs are billed separately. Quotes also vary by area, as our Reading installation page shows.
How long does whole-house air conditioning take to install?
A few days up to roughly two weeks for most whole house air conditioning UK projects. Work is staged area by area, so you stay in the property throughout.
Can I air condition a whole house without ductwork?
Yes. Multi room air conditioning using one or more outdoor units feeding wall-mounted indoor heads covers a house room by room, with no ceiling voids needed.
What size system does a whole house need?
Sizing comes from a room-by-room heat-load calculation rather than one whole-house figure. That calculation sets how many indoor heads you need, and how many outdoor units serve them.
Sources
Cost bands on this page are our own planning estimates, not quotations. Whole-home capacity should come from a room-by-room heat gain calculation rather than any figure here.