ChillFlex Pro AXP26U338CW

The AEG ChillFlex Pro (AXP26U338CW) is a 9,000 BTU single-hose portable air conditioner built to cool a medium room of up to around 20 m², and it is one of the stronger performers in its class. It moves a lot of air for its size, cools a room quickly, runs on low-impact R290 refrigerant and, thanks to its A energy rating, is cheaper to run than many portables. The build is a clear step up from the budget crowd, and despite a 64 dB(A) headline it settles quieter than that in normal use and drops to around 52 dB(A) in sleep mode. For a living room, home office or spare room you want cool by the time you sit down, it earns its place.

The trade-offs are real. At about 31.5 kg it stretches the word portable, so it is a unit you wheel between rooms rather than carry upstairs. This model cools only, with no heating, and unusually for a premium portable there is no Wi-Fi or app, just a remote and a 24-hour timer, which feels dated next to app-controlled rivals. The exhaust hose is a short 1.5 m and the window seal is basic. It launched at a premium of around £429.99 and is now near the end of its life in the UK, so new stock is patchy and often sold as grade A1 or repackaged. Found at a sensible price it is a capable, well-made cooler; at full RRP, newer app-equipped portables give you more for the money.

The ChillFlex Pro is a single-hose portable air conditioner: a free-standing unit on castors that cools the room and vents the hot air out of a window through one flexible hose. There is nothing to install and nothing that needs an F-Gas engineer, the certified refrigerant handling a fixed split requires, so it is the sort of cooling you buy, wheel into place and switch on the same day. The 9,000 BTU (roughly 2.6 kW) output is sized for a medium room, comfortably a living room, bedroom or home office of up to around 20 m².

It suits anyone who wants effective, low-fuss cooling with a bit more polish than the budget portables. It pushes a lot of air, up to 390 m³/h, so it brings a warm room down quickly, and it runs on R290 refrigerant with an A energy rating, which keeps running costs sensible for a unit of this power. It is a genuine 3-in-1: cooling, a fan-only mode, and a dedicated dehumidifier that pulls up to around 29 litres a day, handy in a damp shoulder-season room. The finish, the integrated side handles and the smooth castors all feel a cut above, which is part of what you pay for.

Who should think twice? Anyone who needs heating as well as cooling, app control, or a unit light enough to carry. This model cools only, it is controlled by remote rather than a phone, and at about 31.5 kg it is heavy even by portable standards. Like every portable the compressor and fan sit in the room with you, so for a bedroom the honest pattern is to pre-cool on a higher speed, then drop to sleep mode, rather than run it flat out all night.

The ChillFlex Pro launched at around £429.99 and, when it was widely stocked, was one of the pricier 9,000 BTU portables you could buy. It is now near the end of its life in the UK, so new units are harder to find and are often sold as grade A1 or repackaged stock for less, roughly £250 to £330 depending on condition and seller. That end-of-line discounting is where the value now lies: at £250 to £320 it is a lot of cooler for the money, whereas paying close to the old RRP no longer makes sense against newer app-equipped rivals. Check both price and stock before you commit, as availability is patchy.

Running costs are reasonable for a unit this powerful. It draws around 1 kW at full cooling, so at the July 2026 Ofgem price cap of 26.11p per kWh it costs roughly 20p to 26p an hour, and less once the compressor cycles rather than running flat out. A typical UK summer of occasional evening and weekend use lands somewhere around £20 to £35. The A energy rating and R290 refrigerant are a real part of why it is cheaper to run than many portables of the same output. Prices and rates correct as of July 2026; the energy price cap changes quarterly, so check current rates before budgeting.