What is the difference between supply fan and exhaust fan?

Differences Between These Fans The main difference between the two types of fans is their application. While a ventilation fan works to bring clean air into an enclosed space from an outside source, an exhaust fan removes pollutants from the indoor air in a home or commercial space.

Do I need an Lev?

The simple answer is as follows: If your work processes create harmful dusts, vapours and fumes that contaminate the air and are hazardous to the health of your employees, and other methods you have tried have previously failed, then you will need a LEV system installed in your workplace.

What is supply fan?

Supply air fans, intake fans, supply fan and make-up air blowers are used for specific situations where fresh and or clean make-up air needs to be replaced at a quicker rate than what would normally take place.

Can normal fan be used as exhaust fan?

Whether you’re dealing with a small kitchen mishap or your cigar-smoking uncle, an electric fan can be a savior. Use your pedestal or table fan to suck up the smoky air and blow it out an open window or door. Pointed in the right direction, it can act as an exhaust.

Why do we use Lev?

Effective LEV or dust/fume extraction can carry away airborne contaminants before they can be breathed in. It will help designers, installers and examiners work with their customers to control airborne contaminants effectively. …

What is the purpose of local exhaust ventilation?

Local exhaust ventilation when used as described in (a) shall be designed to prevent dispersion into the air of dusts, fumes, mists, vapors, and gases in concentrations causing harmful exposure. Such exhaust systems shall be so designed that dusts, fumes, mists, vapors, or gases are not drawn through the work area of employees.

How does an exhaust fan work in a home?

Exhaust fans pull odors, fumes, and moisture from an area of the home, venting them outdoors for removal. The fan uses a motor to turn its blades, which function to pull air out of the space. The stale, humid, or contaminated air is propelled through the exhaust vent, exiting the home.

When to install Local Exhaust Ventilation ( LEV ) controls?

In installing controls, the employer should start at the top of the hierarchy before rushing to install local exhaust ventilation (LEV), for example. The employer must first determine what is the most effective controls measure(s).

How can I monitor my Local exhaust system?

Monitor local exhaust ventilation using DegreeC probe style air velocity and temperature switches mounted in duct. Trip point, alarm delay, and recovery point are configurable, and choice of open drain or relay output signals to your PLC or controller.