Gas Furnace Flue Pipe Temperature

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

Gas furnace flue pipe temperature.

The temperature in the flue pipe of your furnace can run as high as 400 degrees celsius which is about 750 degrees fahrenheit. Will likely be above 275 degrees f. When applied to a cooled down pipe. Example 1 determination of the flue gas temperature from a natural gas furnace in this specific example the combustion device is an older lower efficiency natural gas home furnace.

Ft3 the fuel consumption is 100 000 btu hr hhv basis and the heat delivered to the home is. Gas fired heating appliance no draft. It is pretty important that this type of furnace is installed per manufactures instructions. Heat will seal the tape to the metal pipe as the temperature climbs.

The different types of venting. Either case will result in. 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. Flue gases temperature in older low efficiency furnaces 78 and less efficient was sufficient to elevate chimney flue temperature to the point which guaranteed proper draft.

On the other hand the higher the efficiency of a furnace the lower the flue gas temperature. Natural gas fired heating appliance with draft hood. The fuel is considered to be standard natural gas 1040 btu std. Two cases which can cause poor venting are the oversizing of the vent or reducing the btuh input to an existing vent system.

Iii non masonary chimney without any other gas appliances connected. Exhaust temperature o f o c chemical oxidation. 80 furnace flue temperature. When this temperature starts to exceed 130 degree f it is usually an indication that there is a problem.

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. Good up to 600 degrees f. Higher btuh furnaces produce higher flue gas temperatures.

When connecting a new regular type known as category 1 type gas appliances furnace water heater with efficiency slightly below 83 old chimney flue size might. Affecting the temperature of the flue gases. An 80 condensing furnace flue temp. Well making sure that you choose the right venting style will protect them.