Fan Controls

Install controls that are either internal to the fan or external

For intermittent ventilation strategies: Install a controller that can operate the fan intermittently to produce the intended flow

For continuous ventilation strategies: Install an automatic controller that can operate the fan continuously to meet the intended flow rate

Only use continuous operation controls on fans containing ECM motors rated for continuous operation

Install a manual override control to activate the fan as necessary

Occupancy sensors/humidistat:

Install an occupancy sensor and/or humidistat designed to function with the chosen fan and in accordance with manufacturer specifications

Carbon dioxide sensors (demand control):

Only use CO2 sensors with VFD or multispeed fans

Install a clearly labeled manual service disconnect for all ventilation fan controls

Clearly label all whole-house ventilation system controls "Whole-House Ventilation Control"