I'm also curious about this. I've noticed that when I get up to above 8500 ft even in the summer that I have to put on some cabin heat due to a "draft" within the cockpit. I can't tell where it's coming from, but appears to be from those two openings behind the seat that have cloth covers to the back of the fuselage. (I may be wrong) Someone posted in another thread about plexiglass or clear plastic covers for all of the inspection holes up at the wing-fuselage junction and I think that would be a great idea. Is there any air coming from behind the seat from those two large cloth-covered openings? It does seem that the plane is very "drafty" inside and could be tightened up a lot for winter time flying. The heater is fine and warms up the cabin very well, just don't think I should be using it in the summer! I'm dreading this winter...
John
John and Julie Johnson
Lubbock, TX
N227CT (CTLS)
Wave #5