Furnace Exhaust Pipe Temperature

Gas fired heating appliance no draft hood.

Furnace exhaust pipe temperature.

Liquefied petroleum gas fired heating appliance with draft hood. Heat will seal the tape to the metal pipe as the temperature climbs. This temperature is an indication that your furnace is not running at maximum efficiency and you are losing heat up the chimney. 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.

To make it simple the typical combustion gas temperature for a 90 efficient furnace should be in the 100 to 130 degree f range. This is another affordable option for the heating solution. When applied to a cooled down pipe. 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.

It will draw in air for the combustion and then expel the fume outside. Good up to 600 degrees f. With a conventional gas furnace you should be at about 140 f 170 f at the supply plenum. 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. These highly efficient furnaces have a heat exchanger and a condensing chamber that help maintain a considerably low temperature on the pipes. These different plastics have different maximum heat service temperatures. Also known as the induced draft fan this one has a fan that is located on the end of the pipe.

However the temperature at the outlet of the furnace is dependent on the temperature of the incoming air. 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. The low temperature residual flue gases vent outside through special plastic pipes. Exhaust temperature o f o c chemical oxidation.

You would have what is called a mid efficiency furnace basically a regular non efficient furnace that has a flue damper and sometimes a power exhaust added to reduce. This usually equates to a median pipe material temperature value of 86 to 100 degree 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. The temperature in the flue pipe of your furnace can run as high as 400 degrees celsius which is about 750 degrees fahrenheit.