The return air is usually removed by an external exhaust fan to balance the air pressure.
Exhaust fan roof top unit.
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This is usually a belt.
Gravity roof ventilation exhaust fans are used to exhaust relief or supply intake air from or to an enclosed area without the need for a power operated fan.
Our world class engineers and technicians work to design test and deliver the right fan and ventilation solution to meet your needs.
First we have the housing this needs to protect all the mechanical and electrical equipment inside the unit from the sun wind rain snow frost etc.
Go to grainger when you need roof ventilators roof vents roof exhaust fans and accessories for your ventilation systems.
Ul 762 standards cover roof or wall mounted ventilators for restaurant exhaust appliances.
Rooftop exhaust fans are designed to remove heat and odors from buildings to improve air quality and occupant comfort.
The roof or rooftop exhaust fan is the most efficient way to rid a building or facility of overheated air issues.
Areas such as cafeterias locker rooms office spaces restrooms and warehouses often have unique requirements specified by local codes and utilize a wide range of rooftop exhaust fans.
Since hot air rises to the ceiling or the highest point of a structure it makes sense that having exhaust fans mounted on the roof will work best.