To our dismay, we discovered that the circular roof power vents are power-less. They are the same units you buy up north that come with a fan and thermostat and have electrical run to power them. Here, at least south of 44, the are just the shell.
The construction foreman told me that they are just vents added to the roof to exhaust heat. There is a formula for the size of roof to length of ridge-vent (the vent along the peak of the roof). If your house does not have enough linear length of ridge vent, they throw up the power-less round roof vents to aid in the necessary heat-exhaust formula.
I found this surprising. I bought a spec house, so I didn't get to do any planning.
|