For the storage room door. How to make a Barn DOOR. strips of flat bar, x 2 garage door pulleys 2 mending plates 2 door stops 1 pressure treated mending plates were bolted to the pulleys, and screwed onto the door.
Running an fan through the middle to blow air up the pipes would help it radiate out. Bend the pipes around a 55 gallon barrel and make a rocket style insulation around it with sand and plaster. Place some sort of central blower to control speed of air