Free Articles, Free Web Content, Reprint Articles
Sunday, July 15, 2018
 
Free Articles, Free Web Content, Reprint ArticlesRegisterAll CategoriesTop AuthorsSubmit Article (Article Submission)ContactSubscribe Free Articles, Free Web Content, Reprint Articles
 

Air Make-Up Ventilation Unit

Direct Gas-Fired Make-up Air Units supply tempered and filtered air to the indoor environment. In summer, a direct-fired unit may be used as an air handler, with the heater disabled. By adding a DX or evaporative cooling section to the unit, it may be used to supply conditioned air year round.

While there are no facts and figures to show how many buildings in the United States provide the correct amount of makeup air, it can be surmised that there are probably a great many that do not have sufficient makeup air. And there's no one solution that is available for every building. Each building must be analyzed with a careful air balance calculation and evaluated based on the diversity of sources of exhaust air and infiltration.

Make-Up Air Volume Requirements:

The recommended method for calculating Make-up Air Volume is to determine the total CFM capacity of exhaust fans, blowers, stacks, etc. in the building and add 10%. This will create a positive pressure in the building.

When information is not available, the following estimates may be used to determine approximate requirements:

- Paint / Spray Booth: 100 to 200 CFM per sq. ft. of face opening.

- Oven Exhaust: One air change per minute.

- Fume Exhaust: Area of Pipe (in square feet) x velocity (3,000 feet/min average) = CFM.

- Roof Ventilator: same as Fume Exhaust.

- Canopy Hoods: 100 to 300 CFM per square foot of hood open area.
 
- Furnace Combustion Air: Minimum CFM = BTU/hr rating / 6,000.

- Drying, BakingFeature Articles, Curing Ovens: 100 CFM per square foot of booth cross section.

- Pickling or Cleaning Tanks: 150 CFM per square foot of door opening or 200 CFM per square foot of hood face opening.

Additional information can be found at the Fan and Blower company web site http://www.fanblower.com

Susann Terlitski
Air Handling Units (AHU) Engineer
Fan and Blower Co.
abbblower@abbblower.com
http://www.fanblower.com/product.htm
http://www.fanblower.com/manufacturers_centrifugal_blower.htm

Source: Free Articles from ArticlesFactory.com

ABOUT THE AUTHOR




Health
Business
Finance
Travel
Technology
Home Repair
Computers
Marketing
Autos
Family
Entertainment
Law
Education
Communication
Other
Sports
ECommerce
Home Business
Self Help
Internet
Partners


Page loaded in 2.500 seconds