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Aprilaire&#174; Automatic Humidistat Control Humidifier, 18 Gallons Per Day This humidifier features truly automatic humidistat control so there's never a need to manually control the humidifier, utilizes an outdoor temperature sensor for monitoring even the slightes changes in outdoor temperature, delivers up to 50% more moisture in comparison to competitive units, Has an evaporation capacity of 0.75 gallons per houramong the highest capacity humidifiers sold, Humidifies tightly-constructed homes up to 4,200 square feet in size. CUL Listed in US and Canada. 5 Year Limited Warranty.

Aprilaire® Manual Control Power Humidifier, 18 Gallons Per Day

Aprilaire Manual Control Power Humidifier

Aprilaire&#174; Programmable 1 Heat/1 Cool Dual Powered Thermostat (5/2 or 5/1/1 Day)

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Aprilaire® 700 Humidifier With Automatic Humidistat Control 18 Gallons Day