Furnace Make Up Air Requirements

Our duct furnaces can be ordered with several different options so they fit your specific requirements. Makeup air if you have a conventional furnace not high efficiency you can make a simple one by installing a dryer vent in the wall to outside about 2 1 2 ft above the floor pipe it to the area of the burners down into a 5 gallon bucket stopping about 5 inches above the bottom of the pail if your in a colder area insulate the pipe. If the furnace is in a small room then we need ventilation openings in the walls or door of that room to let in plenty of air to make up for the air that the furnace is using.

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Several options are also available for the outdoor and indirect indoor make up air unit.

Furnace make up air requirements.

We believe that it is about 12 years old non he and about 80 efficiency. A furnace must be supplied a specific amount of fresh air per cubic foot of gas burned. The furnace is situated in the center of the basement with the gas hot water heater in. Ten cubic feet of air contains 2 cubic feet of oxygen and 8 cubic feet of nitrogen and other gases combined with water vapor.

This fresh air will enter the air circulation system of the heating system which is separate from the combustion chamber on your furnace. The m series system can be installed in new construction projects as part of a plant expansion a renovation as part of an hvac heating. We hired an hvac guy to install a new aprilaire humdifier which is working well. If we provide plenty of air to the room then the air pressure in the room won t drop and the furnace will be able to send the flue gases out of the house.

We just bought a 1938 home in denver. Department of energy a defining feature of high efficiency furnaces is sealed combustion a process by which outdoor makeup air is piped directly into the burner. In addition our indoor outdoor direct fired make up air unit is an efficient way to supply tempered make up air to your space. Our furnace is a tempstar ntc6 gne upflow horizontal series located in a basement that is partially finished.

According to the u s. The m series make up air units are on the cutting edge of make up air technology and boast many unique features other systems on the market cannot duplicate. Cambridge air solutions is a leader in commercial and industrial make up air solutions. Unfortunately the fresh air intake you have described is the second type and does not provide direct combustion air to the furnace room as it is directly connected to the return air plenum for the furnace.

To burn 1 cubic foot of gas approximately 1 000 btu for natural gas requires 10 cubic feet of air for perfect combustion figure 2.

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