Dehumidifier Sizing

16 pints for 500 sq ft crawl — Very damp

Modeled from DOE/ENERGY STAR guidance; see methodology.

Recommendation: 16 pints/day (35‑pint class)

  • Space type: Crawl
  • Size: 500 sq ft
  • Moisture condition: Very damp

When to size up

If the space often stays below ~68°F, connects to other damp rooms, or you see frequent condensation, consider sizing up from 35‑pint class to the next class.

Portable dehumidifiers are rated at 65°F under DOE 2019/2020. Cooler air reduces capacity; basements and crawls often benefit from moving up one class.