Domestic and light commercial dehumidifiers. Essential to fight dust mite and mold allergies. Mold spores flourish in a damp environment. Dust mites take off and multiply by the millions daily in humid places. A must if you do not have central air conditioning. Wants to protect stored valuables in the basement from water damage such as furniture, computer, electronics, papers, etc. and get rid of a damp, musty odour.