Guides · Air Conditioning

What factors affect the price of air conditioning?

There's no single meaningful price for every air conditioning installation, and we don't publish generic rates that wouldn't reflect your actual project. Two properties of similar size can need very different systems because of the number of rooms, exposure, unit positions and available routes for pipework. Here are the 7 factors that genuinely affect a quote.

1. Number of indoor units

A single-split system has just one indoor unit and one outdoor unit, while a multi-split can supply several from a single outdoor unit. The more rooms that need treating, the more indoor units — and therefore work — are involved.

2. Required output

Floor area alone is not enough. Room volume, exposure and heat gains (glazing, equipment, occupancy) also matter. Getting the output wrong leads either to a system that struggles to hold the temperature, or an oversized, needlessly expensive installation.

3. Building configuration

An older building, a flat in a shared building, a business premises with several zones, or a single-storey house don't come with the same constraints. Facade access, distances between indoor and outdoor units, and fixing options all directly affect how complex the job is.

4. Pipework routes

The refrigerant pipework linking the indoor and outdoor units needs a sensible route, ideally protected and accessible for maintenance. The longer or more complex this route (through slabs, load-bearing walls, suspended ceilings, penetrations, trunking), the more installation time it takes.

5. Condensate drainage

Water produced during cooling needs a suitable drainage route. Depending on where the units are located, this can be simple or require a more elaborate solution, such as a condensate pump or a longer routing run.

6. New installation or replacement

Replacing an existing air conditioner may, depending on the case, reuse some of the pipework or require a full strip-out. Existing equipment cannot automatically be reused: compatibility and condition need to be checked. A new installation in a building with no air conditioning, on the other hand, means creating the entire technical route from scratch.

7. System type

The type of system naturally affects both the amount of equipment required and the design work involved. A single-split installation is not designed or installed in the same way as a larger network serving several business zones. See our guide on choosing between single-split and multi-split for the criteria involved.

Why a project-based quote is more useful than a price per square metre

A surface-only estimate ignores too many installation variables. A serious estimate should, at a minimum, specify the number of zones, how the space is used, installation constraints, and the type of system being considered (single-split, multi-split or VRV/VRF).

Prepare your enquiry

To get a useful answer from the first exchange, include:

• town;
• number of rooms to treat;
• how the rooms are used;
• approximate room sizes;
• where you might want the outdoor unit, if you already have an idea;
• photographs where useful.

This information does not replace an on-site check, but it helps us understand the project sooner. You can send it through our contact page.

Key point

The final quote depends on the system, the number of zones, the output required and, above all, the real installation conditions — not simply the floor area.