Shop for Heating, Venting & Cooling at The Home Depot. This multi-room humidifier makes maintaining proper humidity levels easier than eThis multi-room humidifier makes maintaining proper humidity levels easier than ever. The MA0800 is a workhorse that can handle up to 1700 sq. ft. with 8-gallon output per day. It adds invisible moisture to your home by moving dry air through a saturated wick. Proper humidity in your home is scientifically proven to help prevent flu and allergies. It reduces static electricity, relieves dry skin and scratchy throat, and protects fine furniture and wood floors. It allows you to lower your thermostat setting which will save money.