Portable air conditioners are widely sold in London every summer — easy to set up, no installation needed. But for most homeowners, a fixed wall-mounted split installation delivers better cooling, lower running costs, and less noise. This guide helps you decide which is right for you.
Portable vs Fixed Split: A Comparison
| Factor | Portable unit | Fixed split system |
|---|---|---|
| Installation | None required | Half-day professional installation |
| Cost | £300-£800 to buy | £1,200-£2,200 installed — see cost guide |
| Cooling efficiency | Lower — loses cold air around exhaust hose | Higher — sealed refrigerant loop |
| Noise | Higher — compressor inside the room | Lower — compressor outdoors |
| Best for | Temporary use, rented flats | Permanent cooling, owned property |
For London flats specifically, see our complete guide to AC in London flats. For period properties, our Victorian properties guide covers installation constraints.
When a Fixed Installation Is the Better Choice
If you own your property and plan to stay more than one summer, a fixed domestic installation recovers its cost within two to three years. We cover all London zones — Central, North, West, and South West London.
Frequently Asked Questions
Can a portable AC cool a whole flat?
Not effectively — suited to single rooms up to 25m². See our London flats AC guide for whole-flat solutions.
Are portable AC units allowed in rented flats?
Yes — no permanent installation required. For permanent cooling, freeholder consent is typically needed for a fixed system.
Ready for a Permanent Solution?
Call us for a free survey: 020 7870 2333. A wall-mounted split can typically be installed within a week. Visit our installation page for full details.
Simply Air Conditioning London — F-Gas certified installation and servicing since 2009.
No comments yet.