As a note on the heating/ a.c., I grew up in a house built in the 80's so it had central air and heating, and really every place I've lived in up till now had central air and heating. But this house (built in 1925) came with a furnace that runs on gas and 6 fans on the first floor. No a/c at all unless you count the two old window units that came with the house. They still work, one we put in the kitchen window, the other's in the piratebabe's window.
We bought a few others, one for our bedroom, one for my middle son's room and one for the living room. The babe's room and middle son's room are both on the west side of the house and during the summer they're the hottest rooms, in the winter they're the coldest. And oddly the only heating vent in the babe's room is in one of the closets so we have to keep his closet open and dress him very warmly in the winter. Thankfully middle pirate doesn't have that problem.
Oh, we also have an exhaust fan but that thing's so blasted loud I hate turning it on.