Humidity Doctor is available at these HVAC suppliers

Johnstone (Denver)

Thermostat Cool/ AC Mode

Humidity Doctor cycles humidifier on when AC compressor is not operating to prevent icing of the coil.

Thermostat Heat/Cool OFF Mode

Humidity Doctor will operate in delayed setting with low fan speed. Reduce mold growth by drying crevices.

Thermostat Heat Mode

Humidity Doctor and humidifier operate as usual.

3 Options

Dry cycle, Low Fan speed, Alternate Humidifier with AC Compressor cycle.

Easy 15 Minute Install

Humidity Doctor is a quick install between the hunidistat, furnace and thermostat.

Fits Most Furnaces & Humidifiers

AC Compatible

A better humidification experience