How to Replace a Wall Furnace

If you have a wall furnace, then you may need to replace it every so often in order to ensure that your current one doesn't develop faults. You should keep in mind that a wall furnace is an expensive piece of equipment, and only replace it if you can really afford it. Ensuring that your wall furnace is regularly changed will ensure that you prevent gases from building up inside the old furnace, and will ensure that modern adaptations, such as improved burning times and better ecological benefits don't pass you by. Replacing a wall furnace is something that can be done by an amateur in a few hours.

Materials Needed
  • Wall Furnace
  • Screwdrivers
  • Bolts with nuts
  • Chisel
  • Utility Knife
  • Tape
  • Caulk
Step 1 - Removing the Old Furnace

Your first step in replacing the wall furnace is to remove your old model. It is a good idea to wait until your new one has been delivered before you remove the old one, as it can leave an unsightly gap in your wall while you are waiting for the new one. With most modern wall furnaces, you should be able to easily remove the old one using a screwdriver, but you may find that older ones have been built into the wall. The latter can be a big problem, and you should consider getting professional help. If you do have a newer version, however, you can simply unscrew it from the wall, and then use your chisel to prise it free of the surrounding brick or concrete.

Step 2 - Fitting the New Furnace

Once the old one is out of the way, you should then fit your new one. A new furnace will arrive with a metal plate, which must be fitted into the wall behind where you will be placing the furnace. Use some bolts to screw the metal plate firmly into the wall, and then push the furnace up close to this plate. You will have to ensure that the furnace is placed into the plate as tightly as possible, in order to prevent gases from escaping through gaps. Place your furnace, so that it is connected to the vent cap, or so that your new vent is in close proximity to the outside wall.

Step 3 - Connecting the Furnace

Using the owner's manual, plug your furnace into the gas pipes. This is a rather dangerous thing to do, so ensure that you follow the correct procedure, or call in a professional to help you. Tighten the connections using a wrench, and then wrap duct tape around these portions. You should then ensure that the furnace is snug into the wall, and the plate, and then add a layer of caulking around the edge of both the furnace and the plate. This will help to ensure that toxic gases do not find their way back into the home. Leave the caulk to dry thoroughly before using your wall furnace.