Local Exhaust Ventilation Fan

Local exhaust ventilation lev is an engineering system frequently used in the workplace to protect employees from hazardous substances.

Local exhaust ventilation fan.

Most kitchen range hoods have built in controls usually simple on off switch and speed settings. A local exhaust ventilation lev is an engineering control system used to catch the air contaminants at or near the source and immediately blown out of the room or the area before it reaches the workers breathing system. Exhaust fans force out stale indoor air so it can be replaced by fresh outdoor air. Mechanical ventilation systems may include supply fans which push outdoor air into a building exhaust fans which draw air out of building and thereby cause equal ventilation flow into a building or a combination of both.

Exhaust fans mount through a cutout in a roof or wall. The extract fan system is sized too small and the hood cannot contain or capture the contaminants. Local exhaust ventilation lev workplace fume and dust extraction effective lev or dust fume extraction can carry away airborne contaminants before they can be breathed in. This website provides practical advice for employers and employees on buying and using lev and what to do to comply with the law.

Mechanical ventilation is the intentional fan driven flow of outdoor air into a building. To have an effective system it is important that it is well. Local exhaust ventilation fans have a wide range of controls that will meet ashrae standard 62 2.