I followed the exchanges between Jay J and Roger Dilling with great interest. Even though this dates back to May of 2001, I have an almosat identical problem locating a whole house fan. Roger Dilling was looking for a Craftsman thermostatically controlled whole house fan. I have a Craftsman 30" "variable speed" whole house fan that must be 15 years old and still works perfectly. I want to buy one for my daughter and her husband but can't find a "variable speed" model. Craftsman has gone out of the business and I don't know who made this fan for Craftsman. Ive looked at Grainger but find only 2 speed models.
Any ideas? Thanks in advance!