DSCN6801-@KeithA-(completed video) Improper (dangerous) installation -- furnace combustion air supply pulled from inside utilities room (w/ Furnace, 2 Water Heaters) causing negative pressure in room (and entire home) and potential drafting (backwards) the Water Heater exhausts to contaminate the room and whole house and with "reburn" of their own exhaust fume causing geometric increase of carbon monoxide in room and home