WhichOneToGet

What size dehumidifier do I need?

Three questions. You get the size and the one to buy.

Your home
The problem
Where it'll run

You need about 20 litres a day.

Meaco Arete One 20LGet the Meaco Arete One 20L£259

20 litres a day is the right size for a typical heated home, and laundry mode dries washing indoors.

These picks and prices are for the UK.

Sizes are litres of water removed a day, as manufacturers rate them. In a cold room any compressor model removes far less than its rating — that's why the answer changes to a desiccant.

How we reached this verdict

We compared independent expert reviews with the manufacturer's specifications and the problems owners keep reporting, then checked it's sold at a major retailer where you live. We don't test products ourselves.

Sources: Which?, Expert Reviews, manufacturer specifications.

Updated 6 Oct 2026How we decide

Our verdict is an opinion based on published reviews and owner reports, not our own testing. Specs, prices and availability change — check the manufacturer's and retailer's details before you buy. Terms & disclaimer