Whenever it gets cold outside, my room’s heat just gets magically sucked out through my exterior wall and window. My Indian roommate has it even worse – she has two exterior walls and windows. These are times when we beg our American roommate, who has the interior room with the thermostat, to turn up the heat. Having lived through my first winter in Boston in a leaky apartment, I was very glad to find that someone was working on apartment heating efficiency: Dipul Patel of ecoVent.