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.
Furnace closet door requirements.
Do not install your furnace in a storage closet.
Furnaces in basements.
So the florida building code fbc g2406 and international residential code irc do not allow furnace installation in a bedroom bathroom or an any adjoining closet unless it meets these specifications that essentially isolate the furnace from the room.
Mark the two sides of the door frame on the chalk line of the wall where the doors will be located.
How to build a furnace enclosure.
Jim stewart oct 22 18 at 1 32.
If you have this arrangement the door must be vented.
Measure the width of the framing of the pre hung double interior doors.
Close off vents in door.
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.
A furnace malfunction can cause a deadly carbon monoxide co buildup.
Place the door across two sawhorses.
The heat that the furnace radiates may lead to a fire hazard.
The door when shut sealed against the inlet to the air handler.
The heat can safely escape if there is space around the furnace.
You can do this by attaching a piece of plywood on the back side of the door.
Replace the door by reattaching the hinges.
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.
Be sure to caulk around the seams to make a tight seal.