Topic
3 guides.
Which AprilAire humidifier to ask your contractor for: the 600, 700 and 800 compared on output, water use, wiring and AprilAire's own heating-equipment chart, plus the newer 620 and 720.
Six whole-house humidifiers, chosen on the maker's gallons-per-day rating against the AHRI sizing table, which heating systems each one suits, and what it needs for water, drain and power.
No single portable cleans a whole house. You either spread certified purifiers through the rooms you use, upgrade the furnace filter, or both. Here is how the options compare.
