Air conditioning installation in London is more straightforward than most people expect. The challenge is usually not the installation itself but choosing the right system, finding a qualified installer, and understanding what the process involves.
This guide covers everything you need to know before booking — from system types and installation timelines to costs and what distinguishes a professional installation from a poor one.
Which AC System Is Right for Your London Property?
The most common system installed in London homes and offices is a wall-mounted split unit. For a full overview of system options and services, visit our air conditioning installation page. One indoor unit on the wall, one outdoor condenser — typically on a rear wall, flat roof, or side return.
| System | Best for | Typical install time |
|---|---|---|
| Wall-mounted split | Single rooms, bedrooms, living rooms | Half day to 1 day |
| Multi-split | Multiple rooms from one outdoor unit | 1 to 2 days |
| Ceiling cassette | Open-plan spaces, offices | 1 day |
| Concealed ducted | Whole-house, high-spec residential | 2 to 4 days |
| Floor-standing console | Rooms where wall-mounting is not possible | Half day to 1 day |
For homes, see our domestic air conditioning installation service. For business premises, see commercial AC installation.
The Installation Process Step by Step
Free Site Survey
Every installation starts with a free survey. We visit your property, assess room size, wall construction, ceiling height, and the most practical position for both indoor and outdoor units. Pipework routes are agreed before any work begins.
Quotation
You receive a fixed-price quotation covering all labour, materials, refrigerant, and commissioning. For a breakdown of costs, see our AC installation cost guide for London.
Installation Day
The indoor unit is wall-mounted and connected to the outdoor condenser via a refrigerant line set. Pipework is clad in external trunking or concealed internally where possible.
Commissioning
The system is pressure-tested, charged with refrigerant, and run through full operational tests. All our engineers are F-Gas certified, as required by law.
How Long Does Installation Take?
A single-room wall-mounted split takes four to six hours. Multi-room systems take one to three days. We cover all of London — including Central London, North London, West London, and South West London.
What Makes a Good Installation?
The quality of an AC installation is mostly invisible. Good pipework routing, correct sizing, secure brackets, and a properly commissioned system determine long-term reliability. After installation, annual maintenance keeps the system running at peak efficiency.
Frequently Asked Questions
Do I need planning permission to install air conditioning in London?
In most cases, no. For period properties, see our guide to AC in Victorian and period properties.
Can air conditioning be installed in a flat?
Yes — see our complete guide to AC in London flats for details on freeholder consent and condenser placement.
Does AC require annual servicing?
Yes. An annual air conditioning service keeps the system efficient and maintains the manufacturer warranty.
Can you install in winter?
Yes. Installation is possible year-round.
Book a Free Survey
The first step is a free, no-obligation site survey. Call us on 020 7870 2333 or visit our installation page to book.
Simply Air Conditioning London — F-Gas certified installation, servicing and repair since 2009. 24hr emergency callout: 020 7870 2333.
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