Do not draw return air from a room or space containing a fuel-burning appliance if the room or space is the sole source of return air for the system. Common fuel-burning appliances include furnaces, fireplaces, and water heaters.
There are exceptions of course… it’s the AND part of and return air inlets are located at least (≥) 10 feet from the appliance firebox or draft hood.
Ever notice stuff like that will go in “waves”? The same day that I saw that install… I saw a “flipped” home, that had a new FAU, with the sole return in the bedroom :shock:
Is the doorway a renovation for Santa Clause?
Hard time with chimney chase flue liners and cap.
He greases himself up to slide down those tight confining spaces.
Mrs. Clauses gives him hell when he gets home. Greased up your suite again Mr.C.
The doorway is a great Reno idea.