If your furnace is not heating your home properly as it used to do before, or if your electricity bills are exceeding your monthly energy budget, you should check your furnace and its flue. Your furnace’s flue helps in eliminating carbon monoxide safely from the interior of your home.

Over time, the metal of the furnace flue begins to rust. Moreover, if you do get corrosion, it could be a sign that your furnace flue has not been treated for a long time.

If you avoid taking care of your furnace flue even after noticing the rust formation, you may be at risk of emitting dangerous gases into your home.

Replacing a flue is a complex process and you need experienced hands to do it. D&T Heating and Cooling are highly trusted HVAC companies in Wilmington, DEOur trained and certified HVAC technicians can handle all your home improvement projects, including replacing your furnace flue.

How To Tell If Your Furnace Flue Needs To Be Replaced?

If you can see a leak, it’s a clear sign that you need to repair the flue, but it’s important to remember that not all rust is visible. Your furnace’s exhaust stack extends above the roof and it is hard for you to detect any damage. You can schedule several annual cleanups and inspections to monitor furnace flue. During the annual maintenance, our HVAC technicians alert you to the problems.

How To Replace the Flue Yourself? 

If you are confident in your skillset, you can replace your flue by yourself. First of all, you need to turn off your furnace.

Materials You Will Need: 

  • Tape measure and pencil
  • Gloves
  • Ladder
  • Cordless drill
  • Galvanized sheet elbows and sheet metal ductwork
  • Screws
  • Flue glue or high-temperature silicone
  • Device for pipe crimping
  • Pliers and snips

A Step By Step Guide To Replace Your Furnace Flue 

Remove The Old Flue:

To start the process, you need to unscrew the connections and remove the damaged piece. You need to use a clean cloth to wipe around the edges of the flue.

Cut A New Piece:

Measure the length of the old piece using tape and then use a snip to cut a matching length as the flue pipe. Use a pipe crimper to crimp one end of the pipe.

Push The Pipe Inside:

Next, take the cut pipe and replace it with the old flue and fix all the connections. You need to drill and secure the pipe using some metal screws.

Caulk The Connection:

You can use high-temperature silicone caulk to seal the joints completely. This will prevent the gases from escaping and will help your furnace to run better.

If you encounter any problems during the process or after your project, you can call a professional from D&T Heating and Cooling to check your flue and furnace. If you think and understand the need for help before starting your DIY project, you can call us anytime. With a team of experienced HVAC contractors, we are providing all heating/furnace replacement and installation services in Wilmington, DE. Call us today – 302-838-6905.

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