Questions, answered.
Everything renters ask us before joining the waitlist. Something missing? Write us at hej@frejair.com.
The sleeve adjusts to frames from 60 to 110 cm wide and works with inward-opening, outward-opening and sliding windows. During checkout we ask for two measurements and confirm fit before anything ships.
No. The sleeve clamps into the open window frame with adjustable pressure pads — no screws, no drilling, no permanent changes. When you move out, it leaves no trace.
38 dB(A) in night mode, measured at two metres. That's quieter than light rainfall. The compressor sits on rubber isolation mounts and the fan is oversized so it can spin slowly.
It's rated A++ with an inverter compressor. A typical Copenhagen summer evening of cooling costs about the same as running your dishwasher once. Smart schedules cool only the hours you're home.
The install takes about 15 minutes with the included hex key. The unit weighs 21 kg — one person can do it, but a second pair of hands makes lifting it into the sleeve easier.
Batch 01 ships to Denmark, Sweden, Norway and the Netherlands. Germany is next. Join the waitlist and we'll email you the moment your country opens.
First deliveries are planned for early summer 2027. Waitlist members get launch pricing and priority in the delivery queue — and nothing is charged until your unit ships.
You have 60 nights to try it. If it's not right, we collect it from your door and refund everything, including shipping.