Black Friday dehumidifier deals are hard to resist when you're dealing with damp basements, musty bathrooms, or moisture problems anywhere in your home. The discounts look great, and it's tempting to just grab whatever's on sale and call it done. But choosing the wrong size will cost you more in the long run.

Buy one that's too small and it'll run constantly without making a dent in your humidity problem. Buy one that's too large and you're wasting money and energy on capacity you don't need. The difference between a 16-pint and 50-pint model isn't arbitrary.

Before you jump on a Black Friday deal, here's how to figure out exactly what size dehumidifier you actually need. Plus, f you need help choosing which model is best, we've compiled a guide of the best dehumidifiers in 2025.

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