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Model HHT-217 and HHT-219 for Medium-Large Rooms (10’ x 12’):
This unit is rated most effective for a room that is 120 square feet (approximately 10 foot by 12 foot). If your room is smaller, your air will be circulated and cleaned more frequently. If your room is larger than 120 square feet, it will still effectively clean the air in your room; it typically will just circulate fewer times per hour.
Models HFD-137 and HFD-139 for Medium-Large Rooms (10’x15’)
This unit is rated most effective for a room that is 150 square feet (approximately 10 foot by 15 foot). If your room is smaller, your air will be circulated and cleaned more frequently. If your room is larger than 150 square feet, it will still effectively clean the air in your room; it typically will just circulate fewer times per hour. Model HFD-112
This unit is rated most effective for a room that is 120 square feet (approximately 10 foot by 12 foot). Superior air cleaning power circulates air several times per hour. Comes complete with easy to use touch-button controls with three cleaning levels. Low maintenance filters remove easily and rinse clean.
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