Independent comparisons. We may earn from shop links. More info

Quiet portable air conditioner for a bedroom

Updated: 21 October 2026

The bedroom is the room you want cold at midnight, and it is the room a one-piece portable is worst at silencing. You are trying to sleep, or you are buying for a light sleeper, and the compressor will sit a metre from the pillow. A quiet portable air conditioner for a bedroom can make a heatwave night bearable. It will still be audible, because sleep mode does not move the compressor outside. This page uses the noise lines and the amazon.co.uk reviews behind our [mobile air conditioning units comparison](/hub/cooling/mobile-air-conditioning-units). Peter F. did not measure a bedroom. A qualifying purchase can earn a commission at no extra cost to you.

The bedroom is the room you want cold at midnight, and it is the room a one-piece portable is worst at silencing.

Our top picks

iCAN iCAN 9000 BTU 5-in-1

Best overall

iCAN iCAN 9000 BTU 5-in-1
7.0/10about £399.99
View offer
Air Pro Air Pro AP-E3 7000 BTU

Best value

Air Pro Air Pro AP-E3 7000 BTU
6.7/10about £324.99
View offer
Air Pro Air Pro AP-E4 12000 BTU

Rank 3

Air Pro Air Pro AP-E4 12000 BTU
5.4/10about £499.99
View offer
On this page
  1. 1.Why the bedroom is the hard room
  2. 2.What the listings and reviews say
  3. 3.Set the room up for sleep
  4. 4.If you need it quieter than this

Why the bedroom is the hard room

Every real portable in this set keeps the compressor in the room you are cooling. A fixed split and a porta-split put that compressor outdoors. Sleep mode here is a lower fan or a setback, not a second machine. The Air Pros list sleep and still print 65 dB. The iCAN lists sleep and prints 55 dB. Neither figure is a measurement we made beside a bed. On the 9,000 BTU Air Pro, people run the unit before bed because sleep mode is still loud. On the 7,000 BTU model, some buyers leave it on overnight, and others say the noise carries over the television. A printed night mode is not a promise you will drop off.

What the listings and reviews say

Read 55 dB and 65 dB as labels, not as a bedroom result. Currys treats under 55 dB as quiet and 55–65 dB as average. Reviewers call the iCAN quieter than they expected and not silent. The Air Pro 7,000 BTU, 20 kg and stated for 15 m², draws praise for a medium bedroom in a heatwave and criticism for noise. One buyer still saw 24°C after an hour. The 12,000 BTU reviews say extremely loud, including in sleep mode, and one describes a bang when the compressor switches off. That bang matters at 1am. On the stairs, 20 kg is awkward alone and 26 kg is a two-person lift. The iCAN’s weight is not printed, though reviewers needed two people to place it.
iCAN iCAN 9000 BTU 5-in-1

Testsieger

iCAN iCAN 9000 BTU 5-in-1
7.0/10about £399.99
View offer

Set the room up for sleep

Cool the closed room in the late afternoon, then decide whether it stays on. That matches Air Pro reviewers who will not run sleep mode all night. Shut the door, seal the hose, and close the other windows. A gap around the hose keeps the compressor working, and the noise in the room, for longer. The sash-versus-casement sequence is on the how to vent page. A rigid sash panel blocks more light than a hose in an open window. Fit the panel, then use blackout curtains on any remaining pane. For someone at higher risk in a heatwave, GOV.UK notes talk about a cool room ideally under 26°C. That is a care target, not a temperature a 7,000 BTU box is guaranteed to hit. A portable is not a medical device.

If you need it quieter than this

If 65 dB on the box will not do, leave this category. Aircon Adviser puts the Midea PortaSplit from about 39 dB(A), with the compressor outside, at roughly £950–£1,175. That is not one of the eight rows, and it is not silence. A fixed split is the quieter long-term bedroom if you can install it. Both need a permission conversation, which the portable versus split page covers. Stay with a one-piece unit for a short run of hot nights if you can pre-cool and then switch it off. The 7,000 BTU Air Pro is the reviewed small-bedroom cabinet here. The iCAN prints 55 dB, on only 20 reviews. Neither is silent.

Common questions

Will sleep mode make it quiet enough to sleep?
Not by itself. Sleep mode on these portables changes the fan or the set point. The compressor stays in the bedroom. Air Pro reviewers still call sleep mode loud, and some only run the unit before bed. A few 7,000 BTU buyers do leave it on overnight. Whether you can sleep beside it is personal, and the 65 dB line is not a measurement of your room.
What does 55 dB or 65 dB on the box mean?
It is the figure the listing prints, and these pages rarely say sound pressure or sound power. Currys treats under 55 dB as quiet and 55–65 dB as average. The iCAN prints 55 dB and the Air Pros print 65 dB. We did not measure either beside a bed. Reviewers of the iCAN say quieter than expected and not silent. Reviewers of the 12,000 BTU Air Pro say extremely loud.
Should I cool the room before bed and switch it off?
That is the pattern reviewers already use when sleep mode is too loud. Run it in the late afternoon with the door shut and the hose sealed, then turn it down or off at bedtime if the hum will keep you awake. The room will warm up again. Pre-cooling is a compromise, not a full night of refrigeration.
Is 7,000 BTU enough for a medium bedroom?
It can be, if the door stays closed and the window is sealed. The Air Pro 7,000 BTU states 15 m², and reviewers praise a medium bedroom in a heatwave. The same file says larger rooms and rooms with a gaming PC stay too warm, and one bedroom was still 24°C after an hour. Size up for sun or a loft. The stated area is the maker’s claim.
How heavy is the unit on the stairs?
The Air Pro 7,000 BTU is 20 kg, the 9,000 BTU is 23.5 kg, and the 12,000 BTU is 26 kg. Reviewers say they do not move the unit once the window is sealed, and the 12,000 BTU is described as heavy between floors. The iCAN’s weight is not printed. Reviewers needed two people to place it. Do not plan to carry 26 kg up a tight stair on your own.
Can I vent the hose and still keep the room dark?
Yes, if the seal covers the opening and the curtains cover whatever glass remains. A rigid sash panel blocks more of the window than a hose dropped into a gap. A fabric casement seal can leave a bright line at the zip. An open sash with the hose hanging in it will not be dark or well sealed. Fit the kit first, then the blackout.

Related pages

Best portable air conditioner

Mobile air conditioning units

Portable air conditioner buying guide for UK rooms

How to vent a portable air conditioner on UK windows

Portable air conditioner vs split system in the UK

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.

  1. GOV.UK: bans on F-gas in new products and equipment (retrieved 20 October 2026)
  2. legislation.gov.uk: Regulation 626/2011 Annex II (retrieved 20 October 2026)
  3. GOV.UK: Beat the heat, staying safe in hot weather (retrieved 20 October 2026)
  4. NHS: Heatwave, how to cope in hot weather (retrieved 20 October 2026)
  5. Which?: how to buy an air conditioner (retrieved 20 October 2026)
  6. Ideal Home: portable air conditioner window kits explained (retrieved 20 October 2026)
  7. electriQ: portable air conditioner manual (retrieved 20 October 2026)
  8. amazon.co.uk: Mobile Air Conditioners bestsellers, 19 October 2026 (retrieved 20 October 2026)