Hi, Can someone tell me, or guide me to regs regarding spume and windows.IF I change my boiler to a condenser, in same place, there may be a window problem? Boiler on garage wall, exhaust approx 3 feet to internal corner of house. kitchen window on adjacent wall aprox 6 feet from internal corner.same height as flue.so using triangle, hypotenuse, flue is approx 6.5 feet from flue. is this within regs?