Keep or remove whole house fan?
Our house in SE Michigan has both AC and a whole house fan that I know is resulting in a huge loss of heat during the winter (and likely similar loss of conditioned air in the summer).
Currently we just have a sheet of R5 rigid foam screwed to the ceiling to block off the hole (ugly, but it works for now).
Currently debating between two options:
1. Remove the fan, drywall over the hole, & cover with insulation (less time & money, better insulation, less flexibility for cooling)
2. Create an insulated box over the existing fan w/ a linear actuator set to open the lid when the fan runs (more time & money, likely lower R value, leaves flexibility for cooling but introduces additional system complexity for maintenance)
Thinking things through, I wouldn’t put the fan in if I were building a new home — am I just falling into a trap of sunk costs with option #2?
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