The slow-opening characteristic allows for a gradual increase in gas pressure during the first several seconds of the cycle

It is not interchangeable with standard "Q" series cartridges

As a secondary heat exchanger interface

This mechanical unit facilitates proportional feed action

Does this kit include the delay oil valve

Nordyne 620868 Humidistat 319852-301 The slow-opening characteristic allows forThe Nordyne 620868 Humidistat is a critical component for maintaining precise indoor air quality in residential forced air systems. As the direct replacement for 620868R, this mechanical humidistat utilizes a sensing element to monitor relative humidity levels and cycle the humidifier accordingly. This specific HVAC whole house humidistat is designed for 24V control circuits and features a robust dial interface for manual adjustments. It is engineered