Dehumidifier sizing, done right.

In 2019 they changed what a "pint" rating means, and half the internet never noticed. We did. Enter your square footage, get an honest capacity target in both standards, and see the units that actually cover your space.

Size my space →Why two standards?

The tool

Sizing calculator

Square footage + dampness → pints per day in both standards, plus units that cover your space. The AHAM math, shown openly.

The trust page

Pint ratings explained

Why 70 pints became 50, the three numbers on every spec sheet, and how listings quietly use whichever is biggest.

The money question

Encapsulation cost

$3–$10 per square foot, itemized honestly — what you can DIY, where labor hides, and when to skip it entirely.

Why this site exists

Crawl space and basement dehumidifiers are a spec-sheet minefield: three different pint ratings measured under three different test conditions, coverage claims with invisible asterisks, and advice articles written before the 2019 standard change that nobody went back to fix. Meanwhile the SERPs for "what size dehumidifier do I need" are topped by Reddit threads — helpful strangers, zero verification.

We do the unglamorous part: read the spec PDFs, label every number with its test standard, and put the actual sizing math in an interactive tool instead of a wall of prose. Deadpan specs, checked twice.

That's Pinty, our quality-control department. He cares about exactly two things: keeping your basement dry and keeping his throat wet. He is two-thirds full at all times and considers this optimal.