Furnace Make Up Air Requirements

Ten cubic feet of air contains 2 cubic feet of oxygen and 8 cubic feet of nitrogen and other gases combined with water vapor.

Furnace make up air requirements.

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. 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. Several options are also available for the outdoor and indirect indoor make up air unit. We just bought a 1938 home in denver.

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. Cambridge air solutions is a leader in commercial and industrial make up air solutions. 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.

We believe that it is about 12 years old non he and about 80 efficiency. We hired an hvac guy to install a new aprilaire humdifier which is working well. 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. Our duct furnaces can be ordered with several different options so they fit your specific requirements.

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. 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. 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. According to the u s.

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.