Portable air conditioner vs split system
Updated: 21 October 2026
You have a quote for a fitted split in one hand and a £300–£600 portable in the other, and you need to know which problem you are actually solving. A portable air conditioner vs split system UK choice is about the building as much as the temperature. The hose unit is reversible and cools one room. The split is quieter and more efficient, and it is a job for the wall, the landlord, and sometimes the council. Peter F. compared hose portables for our [mobile air conditioning units comparison](/hub/cooling/mobile-air-conditioning-units), scraped on 19 October 2026. We did not lab-test running costs, and a qualifying purchase can earn a commission at no extra cost to you.
You have a quote for a fitted split in one hand and a £300–£600 portable in the other, and you need to know which problem you are actually solving.
You have a quote for a fitted split in one hand and a £300–£600 portable in the other, and you need to know which problem you are actually solving. A portable air conditioner vs split system UK choice is about the building as much as the temperature. The hose unit is reversible and cools one room. The split is quieter and more efficient, and it is a job for the wall, the landlord, and sometimes the council. Peter F. compared hose portables for our mobile air conditioning units comparison, scraped on 19 October 2026. We did not lab-test running costs, and a qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Form | Listed noise | Heat | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  iCAN iCAN 9000 BTU 5-in-1 | Hose portable | 55 dB | Yes | 7.0 | about £399.99 | View offer |
 Air Pro Air Pro AP-E6 9000 BTU | Hose portable | 65 dB | Not stated | 6.4 | about £449.99 | View offer | |
| Best value |  Air Pro Air Pro AP-E3 7000 BTU | Hose portable | 65 dB | Not stated | 6.7 | about £324.99 | View offer |
On this page
Two different machines
A portable here is a monobloc on castors. The compressor stays in the room, and a hose sends heat out of a window you seal for the weeks you need it. You unplug it in September. The cabinets we kept are mostly 7,000–12,000 BTU, about 19–26 kg, from £324.99 to £556.99, on a normal 13 A socket. A split puts the compressor outdoors. A wall-mounted split was removed from this table because it needed an outdoor unit. Selectra’s 2026 note puts a fan first for mild heat, a fitted split when a room is cooled often, and a portable only where a fixed unit will not be installed, such as a rented flat. Which? calls the fixed system the more efficient machine. BTU method is on the portable air conditioner buying guide.
Permission, landlord, and refrigerant
A hose-only portable does not itself need a planning application, because there is no fixed outdoor condenser. You still need the landlord’s consent before you drill a frame or fit a socket, and a listed building can restrict a window panel. A single split on a house in England is often permitted development. Consent is more likely for a flat, a listed building, or a conservation area. Often is not always. Article 4 directions can remove that right, and Northern Ireland can differ. A tenant should assume they cannot drill unless the landlord agrees in writing. Great Britain bans HFCs with a global warming potential above 150 in new movable units, which is why portables here that name a gas say R290 rather than R32. R290 is flammable. Do not read a split’s R32 label as permission to buy a new movable unit on the same gas. Plugging in is not F-gas work. Leave the circuit sealed.
Noise and what you pay to run it
On a portable the compressor is in the bedroom, at a listed 55 dB on the iCAN and 65 dB on the Air Pros. On a split it is outdoors. How that feels beside a bed is on the bedroom page. Aircon Adviser cites the Midea PortaSplit from about 39 dB(A) at roughly £950–£1,175. That model is not in our eight rows. Which? has cited about 22p an hour on the highest setting in tests of other portables. That is their test, not an Air Pro bill. On the single-duct scale, class A can be an EER of about 2.6, which is not class A on a split. A single hose also pulls warm air back in through gaps. A fortnight of use can still cost less than an install. Every hot spell for years is when the install starts to win. Do not turn 22p into a forecast for the iCAN.
Which to buy, and the in-between
Choose a portable when the install must stay reversible, one room is enough, and you can seal a window for the weeks you need it. The best value here is the Air Pro 7,000 BTU at £324.99, with 70 reviews and no heat mode. The top pick on the review rule is the iCAN at £399.99 if you want heat as well, on 20 reviews and a window-size clash you must measure. Both are still one-room, in-room compressors. Choose a split when you own the decision, or the landlord has agreed, the council is content, and you expect to cool that room through hot spells for years. You are paying for an outdoor unit, a quieter night, and an installer who can handle the refrigerant. A flat, a listed house, or a conservation area is where that path often stops. A porta-split sits between them. The compressor is outside, so the bedroom is quieter than a monobloc, and the Midea price Aircon Adviser discusses, about £950–£1,175, is closer to an install than to a £325 hose unit. It is not one of these eight rows. If the portable still fits, pick a cabinet whose kilograms and watts agree with the BTU.
Common questions
Do I need planning permission for a portable?
A hose-only portable does not itself need a planning application, because you are not fixing an outdoor condenser to the building. You may still need the landlord’s permission, and a listed building can limit what you do to a window. A split is different. On a house in England it is often permitted development, and flats, listed buildings, and conservation areas are more likely to need consent. Check the council. Often is not a guarantee.
Do I need an engineer to install a portable?
You need a 13 A socket and a window you can seal, not an F-gas engineer, to plug in a hose portable. Stand it upright for about 24 hours if it travelled on its side, which the DUXMM bullets state and other manuals repeat. A split install is refrigerant work and needs a qualified person. Scrapping an F-gas charge later is also qualified work. Do not cut a pipe because the portable was easy to unplug.
When is a split the better buy?
When you will cool the same room often, you can fit an outdoor unit, and you want the compressor out of the bedroom. Which? treats the split as the more efficient option and the portable as the no-install option. Selectra points the same way: a fan for mild heat, a split for regular cooling, a portable for occasional use where a fixed unit will not be installed. We have not measured a running-cost gap for the eight listings in this set.
What about a flat, a listed house, or a conservation area?
These are the buildings where a split most often needs consent, even if a house elsewhere would be permitted development. Ask the council, and ask the freeholder or landlord before anyone drills. A portable avoids the outdoor unit and still needs permission if you want to alter a listed window or add a socket. Northern Ireland can differ on the product rules as well as the planning ones.
Can a tenant drill for a split?
Only with the landlord’s agreement. A split needs holes and an outdoor unit, which are not yours to leave behind at the end of the tenancy. A portable that uses a window kit and a plug is the usual renter’s limit, and even that kit should come off without damage. Drilling just for the summer is how deposits get argued over in September.
Is a porta-split a portable or a split?
It is a third type. The indoor part is movable in a way a wall unit is not, and the compressor sits outside, which is why it can be quieter than the hose cabinets here. Aircon Adviser discusses the Midea PortaSplit from about 39 dB(A) at roughly £950–£1,175. It is not one of the eight ASINs, and it is not the wall-mounted split we removed for needing a fixed outdoor unit.
Related pages
Sources
Public UK sources used for this page on 20 October 2026. Prices, stars and review counts are the amazon.co.uk figures in this comparison. Stated room sizes and decibel lines were not treated as a lab test.
- GOV.UK: bans on F-gas in new products and equipment (retrieved 20 October 2026)
- legislation.gov.uk: Regulation 626/2011 Annex II (retrieved 20 October 2026)
- GOV.UK: Beat the heat, staying safe in hot weather (retrieved 20 October 2026)
- NHS: Heatwave, how to cope in hot weather (retrieved 20 October 2026)
- Which?: how to buy an air conditioner (retrieved 20 October 2026)
- Ideal Home: portable air conditioner window kits explained (retrieved 20 October 2026)
- electriQ: portable air conditioner manual (retrieved 20 October 2026)
- amazon.co.uk: Mobile Air Conditioners bestsellers, 19 October 2026 (retrieved 20 October 2026)