Home Humidifiers
Humidifiers can be added to most furnaces. This will replenish the humidity from the gas furnace drying air out the indoor air during heating season. We sell Aprilaire humidifiers and they really work! Humidifiers come in 4 sizes based on the size of your home. TDH Mechanical, Inc. sells and supports Aprilaire humidifiers made by research products. 6 decades in air quality business.

Evaporative Power Humidifier - 700 Series
Model 700A > Automatic > 18gpd > good up to 2200 sq. ft.
Model 700M > Manual > 18gpd > good up to 2200 sq. ft.

Evaporative Bypass Humidifiers - 500/600 series
Model 600A > Automatic > 17gpd > good up to 2200 sq. ft.
Model 600M > Manual > 17gpd > good up to 2200 sq. ft.
Model 500A > Automatic > 12gpd > good up to 1800 sq. ft.
Model 500M > Manual > 17gpd > good up to 1800 sq. ft.
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