An accessory to the whole house fan and has an automatic shut-off and a Low and High feature. Louvers open outside when the gable fan is running, and louvers close when the gable fan shuts off.
An accessory to the whole house fan and has an automatic shut-off and a Low and High feature. Louvers open outside when the gable fan is running, and louvers close when the gable fan shuts off.
USD
