What is local exhaust ventilation?

Also to know is, how does local exhaust ventilation work?

Local exhaust ventilation (LEV) is one such engineering control measure. LEV is an engineering system designed to reduce employee exposure to airborne contaminants (dust, mist, fume, vapour, gas) in the workplace by capturing the emission at source and transporting it to a safe emission point or to a filter/scrubber.

Also Know, when should local exhaust ventilation be used? Local Exhaust Ventilation. Local exhaust ventilation should be installed to remove the process effluents from the work areas when PFSA membranes are heated above 150°C.

Keeping this in consideration, what is the difference between local exhaust ventilation and general ventilation?

General exhaust ventilation, also called dilution ventilation, is different from local exhaust ventilation because instead of capturing emissions at their source and removing them from the air, general exhaust ventilation allows the contaminant to be emitted into the workplace air and then dilutes the concentration of

How do you design an exhaust ventilation system?

The procedure below can be used to design ventilation systems:

1. Calculate heat or cooling load, including sensible and latent heat.
2. Calculate necessary air shifts according the number of occupants and their activity or any other special process in the rooms.
3. Calculate air supply temperature.
4. Calculate circulated mass of air.