Sounds like my preferred way of doing things, Ingrid. It wouldn't hurt my feelings if I didn't need to use the new fangled contraption again this year. I expect it will get hot enough that I will though. These apartments heat up like ovens, then kilns. If there were a window on the north end of the building it would help. Here in Western Washington lots of us don't do heat well, anything above 80F is hot.
I should never overestimate my basic arithmetic skills.