A whole-home dehumidifier is a dedicated appliance installed in the HVAC ductwork or in a utility space that removes moisture from the air independent of the AC. Common brands include Ultra-Aire, Aprilaire, and Santa Fe.
The use case: in Charleston's shoulder seasons (April-May, September-October) outdoor temperatures are mild but humidity is still 70-80%. The AC barely runs because the house doesn't need cooling — but indoor humidity climbs to 60-65% and the house feels gross. A whole-home dehumidifier runs whenever needed, removing moisture even when cooling demand is zero.
Capacity is rated in pints-per-day at standard conditions. Typical residential units are 70-130 pints/day. Sizing matches house volume, infiltration rate, and outdoor humidity baseline — we'll do the load calc.
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