Damp Maths is an independent website. It is meant to be paid through affiliate links: when you click a link to a store and buy, the store may pay us a commission, at no extra cost to you. Under the UK Code of Non-broadcast Advertising (CAP Code) enforced by the Advertising Standards Authority, and the Competition and Markets Authority's guidance on consumer protection law, that connection must be clear before you click. We say it in a short line at the top of every page that carries such links, and in full here.
Where we stand on November 14, 2026
No affiliate programme has accepted this site yet. Every link to Meaco, Pro Breeze, EcoAir, Ebac and B&Q is a plain link to the product page, without tracking, and earns us nothing today. We intend to apply to the programmes run by Meaco, Pro Breeze and Ebac (Awin network) and B&Q (Impact network). When a programme accepts us, links to that store will carry its tracking, and this page will say so with the date.
How we work
- We have not bought, used or tested any dehumidifier. We never describe noise, drying or reliability from experience; we compare what the makers publish, line by line, and say when a figure is not published.
- Every figure has its source and the date we read it (product pages and prices on November 14, 2026; the Ofgem price cap read the same day). Our own arithmetic is marked [calc].
- No brand or store pays to be listed or ranked. "Our picks" follow written rules: for each need, the cheapest model in stock that meets the condition, or the lowest published figure. Tables are sorted by the figure in the column, never by commission.
- We publish no customer reviews, no ratings, no stars and no "tested" claims.
- Health: we quote official sources (gov.uk) word for word and make no health claim of our own.
Prices
Prices are those shown by the stores on the day we checked, during Black Friday promotions. A struck-through price appears only when the store itself shows one; discount codes shown on a store page are not applied. Argos, Currys, AO and John Lewis refused our automated reads that day, so their prices are not shown. Prices change often: check the store before you buy. Criteria, sources and dates in detail: how we compare.