Once your combustion vents have been installed and the ceiling in the closet has been finished out you will want to close off any vents in the door.
Furnace closet door requirements.
Jim stewart oct 22 18 at 1 32.
How to build a furnace enclosure.
A furnace malfunction can cause a deadly carbon monoxide co buildup.
Furnaces in basements.
The heat that the furnace radiates may lead to a fire hazard.
Do not install your furnace in a storage closet.
Be sure to caulk around the seams to make a tight seal.
The door when shut sealed against the inlet to the air handler.
Mark the two sides of the door frame on the chalk line of the wall where the doors will be located.
Close off vents in door.
A furnace can be installed various places in a house in a basement an attic a garage a ground floor utility room or outside the walls.
Unscrew the hinges from the furnace room door with a screwdriver.
You can do this by attaching a piece of plywood on the back side of the door.
Measure the width of the framing of the pre hung double interior doors.
In my house the air enters under the door through vents into a plenum and then goes up through the filter the fan the furnace and the a c evaporator.
The heat can safely escape if there is space around the furnace.
If you have this arrangement the door must be vented.
Cut off the bottom few inches of the door with a circular saw to create a gap that allows air to vent into the furnace room.
Replace the door by reattaching the hinges.