Contact & corrections

🔴 The two messages worth the most to us

1. A capacity figure we got wrong. If a unit’s tested pints-per-day rating is not what we say it is — or we have quoted a pre-2019 number as though it were a modern one, or the other way round — that is the most valuable thing you can send us. Every sizing figure on this site is compared against that rating, so a wrong capacity is not a typo on one page: it can put a reader into a unit a third too small.

2. An ASIN that now points at a different product. Amazon listings get re-used. A URL that showed a 120-pint crawl space unit in August can show a different model, a different capacity or a bundle later, with the reviews and the rating carried over. We re-verify before publishing, but between publications the drift is invisible to us and obvious to you, because you are the one looking at the page.

Tell us the page, the figure, and what you believe it should be. A link to the spec sheet or the listing detail table helps; the product title on its own often does not, because titles in this category disagree with the listing’s own specifications more than you would like.

What we actually do with it

We re-pull the listing data and check the claim against the detail table rather than the title. If it holds, we correct the page in place and change the review date at the top of it — currently 21 August 2026 across the site. We do not quietly edit and pretend nothing happened.

Because sizing runs through one shared set of formulae, a correction to the method fixes every page at once, which is deliberate. A correction to a product is narrower: if a capacity was wrong we update it and re-run the pick, and if a listing has drifted to a different model we pull the product from our recommendations until it is re-verified, rather than leaving a live buy link pointing at something we have never assessed. If a spec turns out to be self-contradictory on Amazon’s own page, we exclude that unit from sizing and say so instead of picking whichever number we prefer.

What we can help with

Questions about how a calculator arrives at a number, or which rating scale a figure is on, are genuinely welcome — the derivations are written into the source for exactly that reason. Suggestions for questions we have not covered are useful too.

What we cannot help with

We cannot diagnose your building over email. Not out of caution for its own sake: the honest answer is nearly always “measure it” — a hygrometer reading in the space, over a few days, at a known temperature — and that is what the tools here already do better than a reply could.

Anything structural, electrical or drainage-related, standing water, or mould beyond a small patch needs somebody who can see the space. So does the question of why it is wet, which a dehumidifier does not answer. And we have never run these units ourselves, so for long-term reliability, real-world noise or how a warranty claim actually goes, a trade forum will serve you better than we can — our editorial policy links the ones we use.

Brands and PR

We do not accept sponsored posts, paid placements, gifted units, link insertions or “collaborations”, and we do not send content to brands for review before publication. Those emails will not get a reply. If you are a manufacturer and we have stated one of your specifications wrongly, that will get a reply — see above.

Reach us

Email corrections@dampdown.com. We read everything and answer what we can.