12 pints for 500 sq ft above-grade room — Very damp

Recommendation: 12 pints/day (22‑pint class)

• Space type: Above-grade Room
• 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 22‑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.

What 12 pints/day means for this above-grade room

• Old-label equivalent: about 15 pints on a pre-2019 (80°F AHAM) box. Ratings shrank when DOE moved testing to 65°F, so ignore old charts that list bigger numbers (why).
• Water removed at rated output: about 1.5 gallons a day. Most bucket units need emptying at least daily at that rate, so a drain hose or condensate pump is worth it here.
• Capacity density: 24.0 pints per 1,000 sq ft, versus 14 pints/day for a basement and 16 pints/day for a crawl of the same size and dampness.
• If the space is larger: 1,000 sq ft at the same dampness needs 17 pints/day (35‑pint class).
• If it gets wetter: wet conditions push this to 14 pints/day (22–35‑pint class).

Compare nearby sizes

• Same above-grade room, other sizes: 1,000 sq ft (17 pints/day) · 1,500 sq ft (22 pints/day) · 2,000 sq ft (27 pints/day)
• Same size, other dampness: Slightly–Moderately damp (10 pints/day) · Wet (14 pints/day)
• Same size and dampness, other spaces: Basement (14 pints/day) · Crawl (16 pints/day)
• Pick interactively: pint capacity picker

FAQ

What size dehumidifier for a 500 sq ft above-grade room that is very damp?

About 12 pints/day under current DOE (65°F) ratings, which puts you in the 22-pint class. On older pre-2019 labels that is roughly 15 pints.

How much water will it pull out each day?

At rated output about 1.5 gallons (12 pints) per day; real output is lower once humidity drops toward your setpoint.