Great list Geo, many thanks. I am finding that having the diesel furnace on keeps my ER at 73 degrees, even though there isn't a blower there.
But that is after I closed the ER vents. Before that, with that 35 degree air entering the space, it was quite cool. All you have to do is push the piston back a little and the door drops. There is also a plastic latch that engages if you push on the door.
I then put a post it on my engine key area to remind me to open the vents before next startup.