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Portable vs split air conditioner

Updated: 21 October 2026

You can cool one room, and the same 12,000 BTU label covers a hose monobloc, a portable split you roll to the window and a wall split that is not finished until an engineer leaves. Portable vs split air conditioner is that choice, not a contest of star ratings. A fixed outdoor unit in England can need planning if it only cools. The model table stays on the [12000 BTU air conditioner comparison](/hub/cooling/12000-btu-air-conditioner). Peter F. updated this on 20 October 2026 from these listings and public UK sources. There was no lab test. A qualifying purchase can earn a commission at no extra cost to you.

You can cool one room, and the same 12,000 BTU label covers a hose monobloc, a portable split you roll to the window and a wall split that is not finished until an engineer leaves.

Our top picks

Generic Generic 12000 BTU wall split

Best overall

Generic Generic 12000 BTU wall split
5.8/10about £659.99
View offer
Midea Midea PortaSplit 12000 BTU

Rank 2

Midea Midea PortaSplit 12000 BTU
8.4/10about £1,099.99
View offer
Air Pro Air Pro AP-E4 12000 BTU

Best value

Air Pro Air Pro AP-E4 12000 BTU
8.0/10about £499.99
View offer
On this page
  1. 1.What actually sits in the room
  2. 2.What you are allowed to do yourself
  3. 3.What the price leaves out
  4. 4.England, the outdoor unit and cooling-only

What actually sits in the room

A monobloc puts the compressor beside you. The Air Pro at £499.99 is the reviewed hose unit: R290, 26 kg, 1,025 W, class A and 3.8 from 20 reviews. Trusted Reviews describes the single-hose gap: heat goes outside and warm air comes back through the rest of the flat. Reviews say 65 dB is too loud for sleep. The Midea PortaSplit at £1,099.99 moves the plant outside without a permanent hole. Reviewers say the lounge cools better because the heat leaves the room. The specification line that says no outdoor unit is required does not match those reviews. The generic wall split at £659.99 needs an outdoor unit and claims 23 dB with no test method. Sleep stays on the bedroom page.

What you are allowed to do yourself

A monobloc hose and a window kit are a household job if the manual and the window match. You are not opening the refrigerant circuit. Midea's marketing says no technician is required for the PortaSplit's factory-sealed hose. The manual still limits work on the refrigerant circuit to a qualified person. You may site the sealed line. You may not open, regas or pierce it. A wall split you joint or charge needs an F-gas certificate. Doing that work in scope without one is a criminal offence in the public UK guidance.
Generic Generic 12000 BTU wall split

Testsieger

Generic Generic 12000 BTU wall split
5.8/10about £659.99
View offer

What the price leaves out

Shelf prices here run from the QINLIGAO at £319.99 and the Air Pro at £499.99 to the generic wall split at £659.99 and the Midea at £1,099.99. Aircon Adviser's July 2026 guide puts a portable at about £300–£650 and a supplied-and-fitted single split at about £1,500–£3,000. The £659.99 generic split is hardware, not a fitted system, and the 10 kg weight field is not credible for two units. Room-size checks stay on the buying guide.

England, the outdoor unit and cooling-only

Class G on legislation.gov.uk is England's permitted-development right for an air-source heat pump. It does not apply when the unit only cools. The Planning Portal says cooling-only air conditioning needs an application. Scotland, Wales and Northern Ireland are separate. The PortaSplit is not a fixed condenser, so Class G is the wrong form for it. Use the Air Pro when you can only vent a hose and you will not sleep beside it. Use the PortaSplit when you can site the outdoor section and £1,099.99 is acceptable. Use a wall split only with an F-gas engineer and, in England, a planning check if it is cooling-only. The best-of page names who skips each model.

Common questions

Is a portable as good as a split?
A single-hose portable is usually worse in the same room, because it dumps heat outside and pulls warm air back in, which is the gap Trusted Reviews describes. It is also louder beside you. The Midea PortaSplit behaves more like a split, and reviewers say the lounge cools better than their old hose unit. A fixed wall split can be quieter indoors, and the shelf price does not show the engineer or, in England, the planning check.
Can you fit a wall split yourself in the UK?
Not if the job includes jointing or charging refrigerant pipe. That work needs an F-gas qualification, and doing it in scope without one is a criminal offence under the public guidance. The generic listing at £659.99 is pre-gassed hardware, not the labour. A window-kit monobloc is the job you can do yourself when the manual and the lease allow it.
Does the PortaSplit need an F-gas engineer?
Midea's marketing and Appliances Direct say no technician is required for the factory-sealed connection. The user manual still limits work on the refrigerant circuit to a qualified person. Site the sealed outdoor section if the window allows it. Do not open, shorten or pierce the line. An outward-opening casement can still block the fit.
Do you need planning permission for an outdoor unit in England?
You do if the equipment is used only for cooling. Class G permitted development is for an air-source heat pump and does not cover cooling-only use. The Planning Portal states that a heating function is required for that right. Volume caps, listed buildings and conservation-area frontages can still block a heat pump that does heat. Scotland, Wales and Northern Ireland are separate. A portable hose does not use this right.
Does heating change the planning answer?
In England it can. Class G is written for a heat pump, and cooling-only use is excluded. A unit that heats and cools may be permitted development if the volume, the siting and the building type all comply. Heating on the title does not skip a listed-building check or the 0.6 m³ cap on a flat. The PortaSplit's heat pump does not turn it into a fixed condenser. Confirm the position before anyone drills.

Related pages

How to vent a portable air conditioner

12000 BTU air conditioner

Quiet 12000 BTU air conditioner for bedroom nights

Best 12000 BTU air conditioner: who each pick suits

12000 BTU air conditioner buying guide, UK checklist

Sources

Public UK sources from the research digest. amazon.co.uk prices, stars and review counts are the listing lines for these six products, captured on 19 October 2026. This is not a laboratory test.

  1. GOV.UK: bans on F-gas in new products and equipment (retrieved 20 October 2026)
  2. GOV.UK: qualifications required to work on equipment containing F gas (retrieved 20 October 2026)
  3. GOV.UK: selling F gas or equipment (retrieved 20 October 2026)
  4. legislation.gov.uk: England GPDO Class G (retrieved 20 October 2026)
  5. Planning Portal: planning permission to add air conditioning (retrieved 20 October 2026)
  6. Midea UK: PortaSplit air conditioner (retrieved 20 October 2026)
  7. Trusted Reviews: single versus dual hose air conditioners (retrieved 20 October 2026)
  8. AirConCompare: how to choose an air conditioner in the UK (retrieved 20 October 2026)