Service manual

Version 1.0 01/05 Page 15
Multiple Heater installation – Terminate all exhaust vents at the same height and all
combustion air inlets at the same height, while maintaining the minimum 12 inches vertical
height clearance from between exhaust and combustion air inlet. Exhaust vent termination edge
shall be at least 12 inches laterally from the edge of the air inlet pipe of an adjacent heater. The
combustion air inlet is part of the direct vent system and not classified as a forced air inlet.