APRILAIRE® AUTOMATIC CONTROL HUMIDIFIER, 12 GALLONS PER DAY THIS WHOLE-HOUSE HUMIDIFIER FEATURES A BUILT-IN BYPASS DAMPER AND IS DESIGNED FOR USE IN SMALL TO MID-SIZE HOMES WITH AUTOMATIC DIGITAL CONTROL FOR PREMIUM PERFORMANCE AND CONVENIENCE. COMES EQUIPPED WITH A DRAIN TO FLUSH MINERALS FROM THE UNIT. HAS AN EVAPORATION CAPACITY OF 0.50 GALLONS PER HOUR, HUMIDIFIES TIGHTLY-CONSTRUCTED HOMES UP TO 3,000 SQUARE FEET IN SIZE. CUL LISTED IN US AND CANADA.