Furnace Exhaust Pipe Temperature

When applied to a cooled down pipe.

Furnace exhaust pipe temperature.

These different plastics have different maximum heat service temperatures. 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. 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. 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.

It will draw in air for the combustion and then expel the fume outside. Since the exhaust pipe is running on a sidewall the fan works together with the furnace. When this temperature starts to exceed 130 degree f it is usually an indication that there is a problem. The low temperature residual flue gases vent outside through special plastic pipes.

To make it simple the typical combustion gas temperature for a 90 efficient furnace should be in the 100 to 130 degree f range. Natural gas fired heating appliance with draft hood. A high efficiency furnace will be lower around 110 f 140 f. This is another affordable option for the heating solution.

Good up to 600 degrees f. This usually equates to a median pipe material temperature value of 86 to 100 degree f. The temperature in the flue pipe of your furnace can run as high as 400 degrees celsius which is about 750 degrees fahrenheit. Liquefied petroleum gas fired heating appliance with draft hood.

Heat will seal the tape to the metal pipe as the temperature climbs. With a conventional gas furnace you should be at about 140 f 170 f at the supply plenum. Exhaust temperature o f o c chemical oxidation. These highly efficient furnaces have a heat exchanger and a condensing chamber that help maintain a considerably low temperature on the pipes.

Gas fired heating appliance no draft hood. The only thing you may have to additionally invest in is a drain line to drain the acidic water that is a result from the condensation from the exhaust. This temperature is an indication that your furnace is not running at maximum efficiency and you are losing heat up the chimney. Also known as the induced draft fan this one has a fan that is located on the end of the pipe.