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The H12 300HB offers convenient whole house coverage in a single bottle design. Re-designed with analog controls and a digital readout that provide easy operation and worry-free monitoring of the unit's status. 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.