Humidity
Whole-House Humidifiers
Furnace humidifiers compared on type, output and the replacement water panel each one uses.
A whole-house humidifier mounts on the furnace ductwork and humidifies every room the system serves. Bypass units use the furnace blower and a bypass duct; fan-powered units add their own fan for more output; steam units boil water and work even when the furnace isn't heating.
Each evaporative model uses a specific water panel, replaced at least once a heating season. Installation involves a water line, a drain and wiring, and is usually a job for a heating contractor.
Before you buy
- Type. Bypass, fan-powered or steam.
- Output. Gallons per day the maker rates it for.
- Water panel. The replacement pad number it uses.
Every whole-house humidifier we cover
22 products
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Figures are the makers' own, quoted with their conditions on each product page. Prices change; each product page links to the current price.