The Green Miles lives in an apartment building in Ballston. A great deal of the apartment's efficiency comes from the building's design -- 10-story, densely-packed, concrete & brick, double-paned windows & doors, lots of natural light & bonus heat from the sun. That design gives it a great deal of temperature inertia -- it stays warm in the winter & cool in the summer.
But this afternoon it's 55 degrees & cloudy -- and with the heat off, my apartment is 73 degrees. Clearly, I'm getting a major boost from neighbors whose love of paying to keep their apartment extra toasty is spilling over into my unit. My apartment gets a similar boost of cool air in the summer from their ravenous air conditioning consumption.
I could complain about how much money they're wasting. And I could brag about how keeping an eye on the thermostat in this efficient apartment has kept my heating bill at a ridiculously low $20-30 per month this winter. But instead, I'll just say thanks for helping me save a few dollars that I can then spend on something I enjoy.