On Oct 5, 1:18*pm, millinghill wrote:
An idea: what if I use a single "three-way switch" and have one hot
leg go to the thermostat, and the other hot leg bypass the thermostat?
The only downside is that it will never be "off" unless I kill the
circuit breaker.
Opinions?

That's fine. I don't have a switch at all on my attic fan. Lots of
them are installed without a switch.