Gas Furnace Flue Pipe Temperature

That is why the range scales on a stove pipe thermometer start saying overfire or too hot starting around 500f.

Gas furnace flue pipe temperature.

High efficiency furnaces use draft inducers. Gas fired forced air furnace main components. Even when designed correctly a natural draft flue system has certain. Try to keep the surface flue temps between 250 and 400 during the peak of the burn cycle.

This type of furnace is also known as a condensing furnace. This usually equates to a median pipe material temperature value of 86 to 100 degree f. So even though the furnace is much more efficient than old furnaces there is still a small amount 20 of the energy is sent into the exhaust is to keep the flue gas temperature from condensing which could otherwise cause the flue pipe to corrode. High efficiency furnace has afue of 87 97 and furnace consists of forced draft condensing low flue stack temperature up to 120 f or 49 c and at least two heat exchangers.

The surface readings will be about 30 50 cooler than the actual flue gas temps. Should be vented into a cat. If your home had a standard 80 efficient furnace the flue gas temperature the temperature of the air and flue gases exiting the home through the flue pipe could be as hot as 450 500 degrees. It is pretty important that this type of furnace is installed per manufactures instructions.

Obviously that s a waste of energy but it s only 20 of the energy contained in the natural gas that is burned in the read complete answer here. Simply put your new furnace may not be compatible with your existing flue pipe. When this temperature starts to exceed 130 degree f it is usually an indication that there is a problem. Iii non masonary chimney without any other gas appliances connected.

Weather tech heating and cooling installs high efficiency furnaces in winnipeg throughout the. The flue gas temperature can be determine in this case by an iterative process of inputting the flue gas mass flows and an assumed flue gas temperature to see if the total flue gas btu hr is equal to 21 194 31 btu hour if not you try another assumed 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.