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Portable air conditioner rental flat: no drilling is not the whole question

Updated: 21 October 2026

You want a portable air conditioner for a rental flat with no drilling because the lease forbids holes and the room is too hot. That search is fair in England, Scotland, Wales, or Northern Ireland. A portable split still needs somewhere safe for the outdoor unit, and a bracket can be an alteration even when nobody calls it a fixture. The listings are on the [portable split air conditioner comparison](/hub/cooling/portable-split-air-conditioner). Peter F. updated this on 19 October 2026. It is not legal advice for your tenancy. A qualifying purchase can earn a commission at no extra cost to you.

You want a portable air conditioner for a rental flat with no drilling because the lease forbids holes and the room is too hot. That search is fair in England, Scotland, Wales, or Northern Ireland.

Our top picks

Midea Midea PortaSplit 12000 BTU

Best overall

Midea Midea PortaSplit 12000 BTU
8.2/10about £1,099.99
View offer
Generic Generic 5000 BTU 2 m tube

Rank 2

Generic Generic 5000 BTU 2 m tube
3.8/10about £403.99
View offer
Generic Generic 5000 BTU UK plug

Rank 3

Generic Generic 5000 BTU UK plug
2.3/10about £454.48
View offer
On this page
  1. 1.What “no drilling” covers
  2. 2.Balcony, ground floor, and upstairs
  3. 3.Lease and planning are different
  4. 4.Split, hose unit, or neither

What “no drilling” covers

No drilling, on these listings, means the seller says you need not bore a wall the way a fixed split is fitted. It does not say a metal bracket on the frame is allowed. A freestanding hose unit is closer to an appliance. A portable split adds a second box outside the glass. Standing it on a balcony you already use is one thing. Screwing a bracket to the frame is an alteration. Tell the landlord when the outdoor unit will be visible. The plug shape is not stated on the PortaSplit listing we used. Only B0HGM44ZW2, at £454.48, states a fitted UK three-pin plug, and it has no reviews. How a bracket goes on is on how to set up a portable split air conditioner.

Balcony, ground floor, and upstairs

A ground-floor renter who could put the PortaSplit outdoor unit outside was pleased. Upstairs without a balcony is called a struggle. The line is about 2 m and fixed. A sill works only if it is at least 30 cm deep. Do not hang the outdoor unit on the steel rope. Outdoor sound pressure on the Midea page is 56 dB(A), so a neighbour can still complain under the Environmental Protection Act 1990. One review on the 2 m generic is not a pattern: that listing is 3.0 from four, and the row still says 1 dB.
Midea Midea PortaSplit 12000 BTU

Testsieger

Midea Midea PortaSplit 12000 BTU
8.2/10about £1,099.99
View offer

Lease and planning are different

A lease can forbid an external box even when planning would not notice a portable. Your contract comes first. The Planning Portal’s note is about England. The permitted-development route they describe needs a heating function, and cooling-only needs an application. The PortaSplit is a heat pump, so it is not cooling-only. Scotland, Wales, and Northern Ireland are not England’s Class G. Grip the building, drill, or add a socket, and you need a yes first. Even with a yes, you do not open the refrigerant pipe.

Split, hose unit, or neither

Choose the PortaSplit if a ground-floor opening or a balcony can take a line of about 2 m, the support is not the rope, and the landlord accepts an outdoor unit that is not drilled in. In this scrape it is £1,099.99, at 4.3 from 23 reviews. Choose a hose monoblock if you are upstairs with no balcony. Choose neither if the lease bans both a vent hose and an outdoor box. Do not hide a unit.

Common questions

Can I cool a rented flat without drilling?
Yes, if the machine uses an existing socket and you do not bore the wall or the frame. A hose unit is the usual way. A portable split can too, when the outdoor unit stands on a balcony or a deep sill and the line passes a gap, which is what pleased ground-floor PortaSplit reviewers. No drilling does not remove the need for a place to stand the box, and it does not rewrite a lease that bans external equipment.
Do I have to tell the landlord?
Tell them if the outdoor unit will be visible, if a bracket grips the window, or if the alteration clause is unclear. Commentators treat a freestanding hose unit with a window kit as an appliance. A split’s second box is a further step. A new outdoor socket needs permission. A seller’s line about never needing a landlord is not the law.
Is a balcony enough, and what if I am upstairs?
A balcony is enough when the outdoor unit can stand within about 2 m, you may use that balcony, and the lead reaches a proper socket. It is not enough if the lease bans anything outside, or if the steel rope would be the only restraint. Outdoor noise at 56 dB(A) on the Midea page still matters next door. With no balcony and no safe opening, do not buy the split. A hose portable is the layout that can still work from an upper window.
Does a window bracket need planning permission?
Clipping a maker’s bracket without screws is closer to the no-drilling claim. Screws in the frame are an alteration unless the landlord agrees, and a listed building can need consent before that. In England the Planning Portal says the permitted-development route they describe needs heating, and cooling-only needs an application. A heat pump is not cooling-only. A temporary stand is not a bolted unit. Scotland, Wales, and Northern Ireland do not inherit that English answer. Read the tenancy first.
What must I not do even if the landlord agrees?
Do not pierce or extend the refrigerant pipe. On the PortaSplit it is sealed R32. A suspected leak means unplug, ventilate, keep flames away, leave, and call service. Opening the circuit or disposing of the unit needs an F-gas qualified person. Do not hang the outdoor unit on the steel rope, and do not feed a load near 10 A from a coiled reel. Consent to use the balcony is not consent to improvise the support.

Related pages

Portable split versus a monoblock

Portable split air conditioner

Best portable split air conditioner: the UK top pick

Portable split air conditioner UK: checks before you pay

How to set up a portable split air conditioner safely

Sources

Public UK sources, the Midea PortaSplit manual and the product fiche. amazon.co.uk prices and stars on these listings were read on 19 October 2026. Page updated 20 October 2026.

  1. Midea UK: PortaSplit (retrieved 19 October 2026)
  2. Midea UK: PortaSplit user manual (retrieved 19 October 2026)
  3. PortaSplit product fiche (retrieved 19 October 2026)
  4. legislation.gov.uk: F-gas Regulation Annex III (retrieved 19 October 2026)
  5. GOV.UK: bans on F-gas in new products and equipment (retrieved 19 October 2026)
  6. Planning Portal: air conditioning in the home (retrieved 19 October 2026)
  7. legislation.gov.uk: Environmental Protection Act 1990, section 79 (retrieved 19 October 2026)
  8. amazon.co.uk listings in this comparison, including B0GYPN1724 (retrieved 19 October 2026)