A basement dehumidifier should be set to maintain a relative humidity of 45% to 50%. A basement dehumidifier setting can be slightly increased to 50% to 55% while you're away to conserve energy.

Add Yahoo as a preferred source to see more of our stories on Google. EyeWolf / Getty Images Humid basements can start to feel muggy, damp, and uncomfortable, while basements with very low humidity ...