Furnace Exhaust Pipe Temperature

This temperature is an indication that your furnace is not running at maximum efficiency and you are losing heat up the chimney.

Furnace exhaust pipe temperature.

To make it simple the typical combustion gas temperature for a 90 efficient furnace should be in the 100 to 130 degree f range. Sidewall venting when your new high efficiency condensing furnace is installed your contractor should take extra precautions to make sure all ventilation systems are properly placed and working correctly. Natural gas fired heating appliance with draft hood. I don 39 t know what temperature your furnace flue pipe should run but an 80 efficiency furnace is not very efficient so i would expect that the flue pipe would run quite hot.

Exhaust temperature o f o c chemical oxidation. With a conventional gas furnace you should be at about 140 f 170 f at the supply plenum. Heat will seal the tape to the metal pipe as the temperature climbs. It will draw in air for the combustion and then expel the fume outside.

Pvc has the lowest rating at 140 degrees fahrenheit cpvc has the highest at 194 degrees and abs falls in between at a maximum service temperature of 160 degrees. This is another affordable option for the heating solution. The low temperature residual flue gases vent outside through special plastic pipes. A high efficiency furnace will be lower around 110 f 140 f.

Good up to 600 degrees f. Some building inspectors discourage taping up furnace clothes dryer and water heater flue joints so check your local building codes before using this tape especially when selling your home. Also known as the induced draft fan this one has a fan that is located on the end of the pipe. The temperature in the flue pipe of your furnace can run as high as 400 degrees celsius which is about 750 degrees fahrenheit.

Since the exhaust pipe is running on a sidewall the fan works together with the furnace. When applied to a cooled down pipe. However the temperature at the outlet of the furnace is dependent on the temperature of the incoming air. When this temperature starts to exceed 130 degree f it is usually an indication that there is a problem.

These different plastics have different maximum heat service temperatures. This usually equates to a median pipe material temperature value of 86 to 100 degree f. Liquefied petroleum gas fired heating appliance with draft hood. Gas fired heating appliance no draft hood.