Just inspected a condo with a room off of the hallway that houses a high efficiency furnace and hot water heater. The doors to the room I am calling a Mechanical room are solid, no louvres. There are 2 registers/grills in the room on the wall one at floor level and one close to ceiling. I am assuming this is for combustion air but I can’t verify as they are behind the unit and I don’t have access. I am concerned about adequate air make up with solid doors. BTW, the unit discharge vent pipe looks like it goes straight up to the roof. The air intake is a short piece of PVC off of the unit (not to outside).
It’s a water heater. Who cares about the solid doors - that’s just one way, not the only way. The grills are very likely to be the sources. The high and low is the best way.
rcloyd
(Russell Cloyd, KY LIC #166164, IN LIC#HI02300068)
3
From your description, it sounds as though there is a provision for combustion air. One high, one low.
