Exhaust fans running in your buildings remove smoke fumes and contaminated air. If you do not have a make up air system or a large enough make up air system you have a negative air pressure condition.

Negative air pressure means that air is sucked into the building to replace the air removed by the exhaust system.

Negative air pressure creates problems :

* Drafts at the floor level
* Back drafting down furnace stacks
* Cold spots and wind chills in working areas
* Exhaust fans start to operate inefficiently
* Strong air inrush when a door is opened

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How Powered Aire's Make Up Air Fans Work

Powered Aire Model  MAF fan is turned on, the damper opens and air is drawn through the shutters and forced into the tube. Tube inflated, air is discharged out the holes at high velocity. This high velocity causes turbulence, which in turn causes the cool outside air to mix with the stratified heat at the ceilings.
 

EXAMPLE:  0 degree F outside air will fill the tube, then the high velocity jets will throw and mix with the stratified heat. When the air has moved 4 ft. from the tube the air temperature will be 70 degrees.

Many manufacturing process generate heat as a by-product. Powered Aire's Make Up Aire Systems can make use of this heat, that is normally wasted, to temper incoming make - up air.
 

TYPICAL MODEL MAF INSTALLATIONS

SIDE WALL INSTALLATION

ROOF INSTALLATION