# Ceiling Cassette Air Conditioning | Cost and When It Fits

> Ceiling cassette air conditioning in London: what it costs over a wall unit, the ceiling void it needs, 1-way or 4-way, and where it is the better choice.

*Climate Shield London — https://climateshieldlondon.co.uk/ceiling-cassette-air-conditioning/. Verbatim from the page; this is the same content, not a summary.*

---

![Ceiling cassette air conditioning unit recessed flush into a ceiling, fitted by us in a London room](https://climateshieldlondon.co.uk/assets/img/jobs/job-09-1200.webp)

# Ceiling cassette air conditioning

A cassette sits flush in the ceiling and sends the air out across the room from above, so nothing goes on the wall. It suits open-plan rooms, kitchens and commercial spaces, and it needs one thing a wall unit does not: space above the ceiling.

- Free survey and a fixed written price
- We will tell you when the cheaper option is the right one
- No obligation and nothing to sign

Price it in 60 seconds [WhatsApp us](https://wa.me/447875564437?text=Hi%20Climate%20Shield%2C%20I%20would%20like%20a%20price%20for%20ceiling%20cassette%20air%20conditioning.)

[Rated 5.0 on Google](https://maps.google.com/?cid=13450400776658321728)

## Book a free survey

We come out, measure, and send a written price. No charge, no obligation, and no deposit before you have seen the number.

Prefer to talk? 020 3393 1331

## Accredited, and fitting the brands you know

![NICEIC approved contractor](https://climateshieldlondon.co.uk/assets/img/accreditations/niceic-mark.webp) ![Gas Safe Register](https://climateshieldlondon.co.uk/assets/img/accreditations/gas-safe-mark.webp) ![MCS certified](https://climateshieldlondon.co.uk/assets/img/accreditations/mcs-mark.webp) ![RECC, Renewable Energy Consumer Code](https://climateshieldlondon.co.uk/assets/img/accreditations/recc-mark.webp) ![TrustMark, Government Endorsed Quality](https://climateshieldlondon.co.uk/assets/img/accreditations/trustmark-mark.webp) ![Vaillant](https://climateshieldlondon.co.uk/assets/img/brands/vaillant.573f9864.webp) ![Clivet](https://climateshieldlondon.co.uk/assets/img/brands/clivet.15efbad2.webp) ![Samsung](https://climateshieldlondon.co.uk/assets/img/brands/samsung.3b6b3325.webp) ![Daikin](https://climateshieldlondon.co.uk/assets/img/brands/daikin.ce47c11f.webp) ![Mitsubishi Electric](https://climateshieldlondon.co.uk/assets/img/brands/mitsubishi-electric.2977d309.webp) ![Bosch](https://climateshieldlondon.co.uk/assets/img/brands/bosch.7d80a7ce.webp)

## Air conditioning we have fitted

Our own jobs, photographed on site. Real rooms, real outdoor positions, nothing from a catalogue.

[All projects](https://climateshieldlondon.co.uk/projects/)

[![Outdoor unit on wall brackets, a job we fitted in London](https://climateshieldlondon.co.uk/assets/img/jobs/job-04-800.webp) Air conditioning **Outdoor unit on wall brackets** Above brick, isolator and cabling run tidy](https://climateshieldlondon.co.uk/projects/)[![Condenser going up on straps, a job we fitted in London](https://climateshieldlondon.co.uk/assets/img/jobs/job-06-800.webp) Air conditioning **Condenser going up on straps** Lifted into a wall position, no scaffold](https://climateshieldlondon.co.uk/projects/)[![Wall unit, commissioned, a job we fitted in London](https://climateshieldlondon.co.uk/assets/img/jobs/job-07-800.webp) Air conditioning **Wall unit, commissioned** Set to 24 degrees and handed over](https://climateshieldlondon.co.uk/projects/)[![Black wall unit in a sitting room, a job we fitted in London](https://climateshieldlondon.co.uk/assets/img/jobs/job-08-800.webp) Air conditioning **Black wall unit in a sitting room** Chosen to sit with the room, not against it](https://climateshieldlondon.co.uk/projects/)[![Ceiling cassette, a job we fitted in London](https://climateshieldlondon.co.uk/assets/img/jobs/job-09-800.webp) Air conditioning **Ceiling cassette** Recessed flush into the ceiling](https://climateshieldlondon.co.uk/projects/)[![Samsung Wind-Free, a job we fitted in London](https://climateshieldlondon.co.uk/assets/img/jobs/job-11-800.webp) Air conditioning **Samsung Wind-Free** Cooling without a draught on the room](https://climateshieldlondon.co.uk/projects/)[![Rooftop commissioning, a job we fitted in London](https://climateshieldlondon.co.uk/assets/img/jobs/job-12-800.webp) Air conditioning **Rooftop commissioning** Pressure tested and charged on gauges](https://climateshieldlondon.co.uk/projects/)[![Outdoor unit at ground level, a job we fitted in London](https://climateshieldlondon.co.uk/assets/img/jobs/job-14-800.webp) Air conditioning **Outdoor unit at ground level** On paving beside the house, easy to service](https://climateshieldlondon.co.uk/projects/)[![Black wall unit, running, a job we fitted in London](https://climateshieldlondon.co.uk/assets/img/jobs/job-15-800.webp) Air conditioning **Black wall unit, running** Quiet enough for a bedroom](https://climateshieldlondon.co.uk/projects/)[![One-way ceiling cassette, a job we fitted in London](https://climateshieldlondon.co.uk/assets/img/jobs/job-16-800.webp) Air conditioning **One-way ceiling cassette** Only the grille shows](https://climateshieldlondon.co.uk/projects/)[![Outdoor unit on paving, a job we fitted in London](https://climateshieldlondon.co.uk/assets/img/jobs/job-17-800.webp) Air conditioning **Outdoor unit on paving** Against render, clear of the boundary](https://climateshieldlondon.co.uk/projects/)[![Condenser high on a wall, a job we fitted in London](https://climateshieldlondon.co.uk/assets/img/jobs/job-18-800.webp) Air conditioning **Condenser high on a wall** On brackets where the ground was not an option](https://climateshieldlondon.co.uk/projects/)

A ceiling cassette adds 500 to 900 pounds per indoor unit to the price of the same system with wall units. The difference pays for the work in the ceiling void, the condensate pump and making good the ceiling afterwards. One room with a wall unit is 2,400 to 3,200 pounds fitted.

It is the better choice when the wall is the problem, and the more expensive choice when the wall is fine.

![An outdoor air conditioning unit we fitted on brackets on a London rear wall](https://climateshieldlondon.co.uk/assets/img/svc/ac-install-700.webp)

Your estimate

£2,400*to*£3,200

Supplied, fitted, commissioned and certificated. Includes VAT.

Send this on WhatsApp

## Price the fitted option

A fitted split system, priced. It is the option this page is comparing against, and this is what it actually costs.

How many rooms?

How big is the room?

Last step: what number should we call with your fixed price?

Every figure on this site is an estimate built from the quotations we issued in 2026 and our own installation experience. It is not a quotation. The price you are given after the free survey is the price you pay.

## From first call to cool rooms in three steps

1. Free survey We measure the rooms, find the outdoor position and check permission for your address.
2. A fixed written price Units, pipework and electrics itemised. The number does not move unless the job does.
3. Fitted in a day One room a day, tested in every mode, and shown to you before we leave.

Book the free survey or call 020 3393 1331

### Read the full guide: 5 sections, about 3 minutes

## Side by side

|  | Ceiling cassette | Wall-mounted unit |
| --- | --- | --- |
| Where it goes | Flush in the ceiling; only the grille shows | High on a wall |
| What it needs | A void above the ceiling deep enough for the unit | A clear wall, ideally an outside one |
| Air distribution | From the middle of the room, in 1, 2 or 4 directions | From one wall across the room |
| Condensate | Pumped up and away to a drain | Usually runs away by gravity |
| Price per indoor unit | +£500 to £900 over a wall unit | The baseline: £2,400 to £3,200 for one room |
| Typical rooms | Open-plan kitchens, extensions, offices, shops, classrooms | Bedrooms, living rooms, home offices |
| Grid ceilings | 600mm square cassettes drop into a standard ceiling tile grid | Not relevant |
| Disruption | The ceiling is opened and made good | One hole through the wall |

Every figure on this site is an estimate built from the quotations we issued in 2026 and our own installation experience. It is not a quotation. The price you are given after the free survey is the price you pay.

## When a cassette is the right answer

When there is no good wall. Kitchens with wall cupboards, rooms with glazing on two sides and extensions with a roof light often have nowhere sensible for a wall unit, and a cassette in the ceiling solves it.

When the room is big or open-plan. A 4-way cassette in the middle of the ceiling spreads the air evenly in every direction, where a wall unit at one end leaves the far side of a long room warmer.

When there is a suspended ceiling already, as in most offices and many shops. Our [new nursery in East Barnet EN4](https://climateshieldlondon.co.uk/projects/nursery-air-conditioning-east-barnet-en4/) has twelve ceiling cassettes on one Samsung system, photographed from bare pipework to the units in the ceiling grid.

## When it is the wrong answer

When there is no void. A flat with a concrete ceiling and nothing above it but the flat upstairs has nowhere for the unit to go, unless a lowered ceiling is built first, and that usually costs more than the cassette.

When the wall is perfectly good. In a bedroom with a clear outside wall, a quiet wall unit does the same job for 500 to 900 pounds less, and it is easier to reach for a filter clean.

When the room is small. A cassette is at its best spreading air across a large space; in a small room it is an expensive way to do what a wall unit does.

## What the extra cost buys

The work above the ceiling: the unit hung from the structure, the refrigerant pipework and cables run through the void, and a condensate pump to lift the water away to a drain, because a cassette sits too low for gravity.

Then the ceiling itself: the opening cut to the unit's size and made good around the grille, which is plastering and decorating that a wall unit never needs.

The same cassette can run alongside wall units on one multi-split outdoor unit, within one manufacturer's range. See [single split vs multi-split](https://climateshieldlondon.co.uk/single-split-vs-multi-split/).

## Other things people weigh up

[Split vs portable air conditioning A portable unit costs 300 pounds and a fitted split costs 2,400. Compare](https://climateshieldlondon.co.uk/split-vs-portable-air-conditioning/) [Single split vs multi-split If you want more than one room cooled, this is the decision that shapes the whole installation: several small outdoor units, or one bigger one serving all of them. Compare](https://climateshieldlondon.co.uk/single-split-vs-multi-split/) [Air conditioning vs air source heat pump These are the same technology wearing two names, and the confusion costs people real money. Compare](https://climateshieldlondon.co.uk/air-conditioning-vs-air-source-heat-pump/) [Daikin vs Mitsubishi Electric We fit both, so we have no reason to talk you into either. Compare](https://climateshieldlondon.co.uk/daikin-vs-mitsubishi-air-conditioning/) [Ducted air conditioning hidden from view With a ducted system the indoor unit sits out of sight in a ceiling void, a loft or a cupboard, and the air reaches the room through ducts and grilles. Compare](https://climateshieldlondon.co.uk/ducted-air-conditioning/) [What happens on a survey An hour, nothing to sign, and a written fixed price afterwards. The fastest way to settle any of this properly. Free survey](https://climateshieldlondon.co.uk/free-air-conditioning-survey/)

### Or just ask

This is the kind of question that takes three minutes on the phone.

Call 020 3393 1331

## Questions people ask

### How much does ceiling cassette air conditioning cost?

In a London home, one room with a wall unit is 2,400 to 3,200 pounds fitted, and a ceiling cassette adds 500 to 900 pounds to that for each indoor unit.

Commercial jobs are priced from a survey and a heat load calculation, because the ceiling, access and working hours vary so much. See [commercial air conditioning](https://climateshieldlondon.co.uk/commercial-air-conditioning-london/).

### Do I need a false ceiling for a cassette?

You need a void above the ceiling deep enough for the unit, its pipework and its condensate pump. A suspended ceiling gives you that, and 600mm square cassettes drop straight into a standard tile grid.

In a home, the void between a ground floor ceiling and the floor above often works. The survey checks the depth and the joist direction before anything is quoted.

### Is a 4-way cassette better than a 1-way?

For the middle of a large room, yes: it sends the air out on all four sides. A 1-way cassette is narrower and blows in one direction, which suits a ceiling near a wall or a long, narrow room.

The room's shape decides, and the survey is where that gets settled.

### Does a ceiling cassette heat as well as cool?

Yes. Every system we fit is reversible, so the cassette that cools in August heats in February, at roughly three to four units of heat for every unit of electricity.

## Not sure which way to go?

Tell us the rooms and what you are trying to achieve. We will say which of these we would fit in your property and why, before anybody quotes anything.

Call 020 3393 1331 [WhatsApp us](https://wa.me/447875564437?text=Hi%20Climate%20Shield%2C%20I%20would%20like%20a%20price%20for%20ceiling%20cassette%20air%20conditioning.)

Monday to Friday 9am to 7pm, Saturday 10am to 3pm, Sunday closed

Page updated 6 November 2026