Cogeneration, also known as combined heat and power (CHP), is a natural-gas-fueled method of generating electricity for your co-op or condo building — and it’s down-to-earth, not pie-in-the-sky, as one Queens co-op found after getting got financing to install a cogeneration plant that’s reduced it Con Edison bills by 85 percent. Eight-five. Not a typo. Here’s how that co-op board did it.  Read More……