Best portable air conditioner for a bedroom

A portable AC that cools brilliantly but roars like a jet engine is useless in a bedroom. For sleep, you're balancing three things: enough cooling power for the room, low enough noise, and a night mode. Here's what to actually look for.

1. Noise — the make-or-break for bedrooms

Check the decibel (dB) rating before anything else. For sleeping:

• Under 50 dB — quiet enough for light sleepers
• 50–54 dB — fine for most people, like a soft hum
• 55 dB+ — noticeable; okay if you sleep through noise

Look for a "sleep" or "night" mode, which dims the display and lowers fan speed automatically.

2. BTU — enough for the room, not more

Most bedrooms are 10–20 m², which means 7,000–10,000 BTU is the sweet spot. Going bigger just adds noise and cost you don't need. For the full room-size chart, see our BTU room size guide.

3. Window kit & hose

You'll vent the hot-air hose out a window. If you have tilt-and-turn windows (standard in Germany and Austria), make sure it'll seal — see portable AC with tilt-and-turn windows before you buy.

4. Nice-to-haves

• Timer — run it as you fall asleep, auto-off later to save power
• Remote — adjust without getting up
• Washable filter — easier upkeep
• Heat function — a 2-in-1 unit doubles as winter heating

On a tighter budget or can't vent a window? A quiet tower fan or air cooler is a cheaper bedroom option — see portable AC vs air cooler.