Industrial power roof fan ventilators, high temperature fans and high pressure ventilators, centrifugal and axial roof fans, power roof / wall exhaust and supply fans and inline ventilators and blowers. Quick delivery of industrial roof and wall fans / ventilators.
BLOWERS DEPOT

Roof Exhaust Fans

                                                  


Call us today: 1-888-763-1800    E-mail: nis@primus.ca


 























Supplier of regenerative blowers, positive displacement blowers, Acme fans, Delhi fans, fiberglass fans / FRP blowers, Plastec Propylene fan ventilators, American Coolair ILG ventilators & fans, Grainger ventilators, explosion proof blowers, power roof ventilators, replacement fan bldes / blower wheels.
Canadian Blower industrial blowers, commercial fans, high-temperature industrial blowers, Canadian Blower pressure blowers,  Canadian Blower OEM industrial fans, roof and wall exhausters.
When the required rate of air change ventilation 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, Baking, 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.
Negative Air Pressure in industrial manufacturing facilities can create problems such as:
- Exhaust fans losing performance, as the building pressure becomes negative.
- Pilot light outages and exhaust system failure on natural draft gas equipment.
- Cold air drafts and infiltration of dirt and contamination from outside.
- Difficulty opening or closing exterior doors.