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Q: What flue gas is measured to determine the efficiency of a gas furnace?
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How can you tell if its a high efficiency furnace?

pvc flue pipe and has a condensate drain


Can you run gas furnace and gas hot water heater into one flue?

Of course If the flue is sized properly


What the purpose of the vent on a gas furnace?

The purpose of the vent on the furnace is to ventilate flue gases out side of the house.


What is the purpose of the vent on a gas furnace?

The purpose of the vent on the furnace is to ventilate flue gases out side of the house.


What is the purpose of a vent on a gas furnace?

The purpose of the vent on the furnace is to ventilate flue gases out side of the house.


What is the typical flue gas temperature of a category 3 furnace?

120


What is the Heat loss in blast furnace?

In a furnace large amount of the heat supplied is wasted in the form of exhaust or flue gases.. that s called as heat loss in a furnace..


What is important about measuring the percentage of O2 in the flue gas from fired equipment?

The percent O2 in the flue gas is a measure of the combustion efficiency of the burner. The burner requires excess air to complete the combustion process. This amount of excess air is measured by measuring the O2 in the flue gas and plugging the results into the formula: [O2 / (20.9 - O2)] x 100 to determine the amount of excess air. 0% excess air is 100% combustion efficiency.


What is a furnace draft?

The air flow up your chimney that carries the products of combustion (flue gases) out of your house.


Can a gas fireplace and a furnace share a chimney?

If both fireplace and furnace are BOTH gas, if the flue has the correct size, AND if your building code permits, yes. If furnace and fireplace are different fuels, no. Check with your local building inspection department.


How do you light a pilot for a HVAC?

if it's a 90 % furnace you may have a flue or intake air problem or a bad pressure switch make sure you are venting the flue gases and the fresh air intake is clear


What is the difference between flue gas and stack gas?

There is no difference. They both refer to the product that leaves a furnace post combustion