I've been contemplating methods of obtaining heat from
the attic for heating the house during appropriate times
of the year. One idea I have is to put a ducted fan in
the attic to blow the warm/hot air into the garage as an
initial experiment. I can heat the garage to determine
the feasibility of the concept.

I'm also thinking that a reversible ventilator would be
in order in that it could double as a way to vent hot
air from the garage into the attic and out through the
roof vents during hot weather. This would even cool the
attic somewhat and help the A/C load on the main part
of the house.

Anyone have any thougts?