What the pint number on a dehumidifier actually means

The change, in one table

That mapping is ENERGY STAR's, not ours. It is the official approximate correlation between the two procedures, and it is the single most useful thing to know before reading any dehumidifier advice written before about 2021.

Why the test changed

The old 80F condition described a warm, humid living room. Almost no dehumidifier lives in one. They live in basements, and a basement in July sits nearer 65F. Rating a machine at a temperature well above where it operates produced a number that flattered every product on the market equally, which made comparisons between them fine and made the absolute figure misleading.

ENERGY STAR's own wording is direct about it: the new procedure specifies that portable dehumidifiers are tested at 65F rather than 80F to more accurately reflect expected performance in a basement setting, and that the 15F reduction in test temperature means a dehumidifier tested to the new procedure will likely report a smaller capacity than when tested to the old one. The standards took effect in June 2019 and the relabeled products reached shelves in early 2020.

The third number, which is the one to distrust

There is a further figure in wide circulation that is not a DOE rating at all: capacity at saturation, usually quoted at 95F and 90% relative humidity. It is a legitimate measurement of a legitimate condition - the one a restoration contractor cares about after a flood - and it is legal to print on a consumer listing.

It is also a much bigger number, and it is where the real confusion in this category now lives. Examples from our own registry, all read off live listings on 2026-09-01:

Note what the hOmeLabs listings do, because it is the right behavior: they print both numbers and label the condition on the larger one. That is disclosure. The problem case is a listing that prints only the saturation figure, which is what most of the crawl space and commercial class does.

How to read any listing in five seconds

1. 1Find the pint number and look for a temperature next to it. If it says 95F or 90% RH, that is a saturation rating and it is not comparable to a DOE one.
2. 2Check for an ENERGY STAR badge. Certified units have a published DOE capacity and IEF in the government's own product list, which means the figure has been verified rather than asserted.
3. 3Ignore the square footage entirely. In our registry, 50-pint machines claim 4,000 to 7,500 sq ft - a 1.9x spread for identical certified capacity.
4. 4If the listing mentions a pre-2020 equivalent, take it seriously. Honeywell's TP70 listing says 50 pints, 70 pint under the 2012 DOE standard. A maker that volunteers that is telling you it expects to be read carefully.

What this means for what you buy

Practically, three things. If someone recommends a 70-pint dehumidifier, they mean today's 50-pint - buy that, not a modern 70-pint saturation-rated unit that is really a 50. If you are replacing an old machine, look up its old rating in the table above rather than matching the number. And if you are comparing a crawl space unit against a portable, convert to the DOE scale first or you are comparing nothing.

For the actual sizing decision - which pint rating your room needs - see what size dehumidifier do I need, and for the reference table by room type see the capacity chart.