warm is good, but gas heat is bad

Today I learned boring stuff, like if we tape up the vent in the master bedroom and I stay there, then we can turn on the heat without making me sick, which is only interesting if your husband has to apply a bunch of caulk before we put down flooring, and the surfaces have to be above 60 F. It's been cold around here lately.

So have a picture of Montezuma Castle.