Ultra Air Cooler guide

Ultra Air Cooler: what a portable evaporative cooler can (and can't) do for a hot room

A plain-English look at how the Ultra Air Cooler works, who it suits, and what to know before buying.

Illustrative image. Actual product appearance and cooling performance may differ.

How does a portable air cooler work?

Most small "air coolers" are evaporative coolers. They pull air across a damp filter pad, and as the water evaporates it takes some heat with it, so the air coming out feels cooler and slightly more humid. There is no refrigerant and no compressor, which is why these units are small, light and cheap to run.

That's also the key difference from an air conditioner: an air conditioner removes heat and moisture from a room, while an evaporative cooler gives a cooling breeze to the area right around it.

Set your expectations: how much cooling you feel depends on the air temperature, the humidity and the settings you choose. Evaporative cooling works best in warm, dry air and is less effective in very humid conditions. A personal cooler won't replace an air conditioner for a whole house.

Who is a portable cooler a good fit for?

A desk, bedside table or reading corner where you want a cooler stream of air nearby
Small rooms, home offices, caravans, sheds or workshops
Anyone who wants a low-power option for warm days and doesn't need to cool an entire home
People who like the idea of a rechargeable unit they can carry from room to room

Ultra Air Cooler: features listed by the seller

Here is what the seller states about the Ultra Air Cooler. Specifications can change, so check the order page for the latest details.

USB rechargeable

Charges with the included USB cable, so it can move around the home with you.

550 ml water tank

Stated to run up to 8–12 hours per fill when plugged in, depending on settings and conditions.

Battery run time

Around 3.5 hours on a full charge, depending on speed, room temperature and humidity.

Multiple speeds

Several fan speeds including a Turbo mode, plus room in the tank for ice cubes.

LED night light

Choose from several colours, or switch the light off completely.

Replaceable cartridge

A sponge cooling cartridge that the seller recommends replacing every 1–3 months.

Artistic illustration only. It does not represent real-world cooling performance.

Tips for getting the most from any evaporative cooler

Place it close to you and let air flow freely around it
Use fresh, cool water, and add ice cubes on the hottest days
Keep a window slightly open in small rooms so humidity doesn't build up
Clean the tank regularly and replace the cartridge when it's due

Choose your country

Offers, prices, delivery and returns differ by country and are set by the seller. Pick your location to go to the right order page.

🇺🇸 🇨🇦Buy in the US & Canada See the Ultra Air Cooler offer for North America 🇬🇧Buy in the United Kingdom See the Ultra Air Cooler offer for the UK 🇩🇪Buy in Germany See the Ultra Air Cooler offer for Germany 🇫🇷Buy in France See the Ultra Air Cooler offer for France

Frequently asked questions

Is the Ultra Air Cooler the same as an air conditioner?

No. It's an evaporative cooler: it cools the air around it using water, rather than cooling a whole room with refrigerant.

Does it work in humid weather?

It can still give a cooling breeze, but the effect is usually weaker when the air is very humid.

How is it powered?

The seller states it is rechargeable via USB and can also run while plugged in.

What about delivery and returns?

These depend on your country and are set by the seller. Read the terms on the order page before you buy.

This page is independent, informational content and is not the official website of the Ultra Air Cooler or its manufacturer. Product details are based on information published by the seller and may change. Individual results will vary.