Roof Exhaust Fan - General Ventilation - Vertical Discharge: 5,000 - 56,000 CFM

Function:

Rooftop exhaust fans are a simple and efficient way to rid a building or facility of overheated & toxic or nuisance air issues. Since most process air rises to the ceiling or the highest point of a structure due to the airs low density, it makes sense that having exhaust fans mounted on the roof will work best. Not all facilities can utilize a roof exhauster due to weight issues, pitch of roof, access to the roof and so on. In applications where the air has a higher when compared to clean air at STP (Standard Temperature and Pressure), wall exhaust fans are often preferred.
Tubeaxial upblast propeller direct drive Roof Exhauster for Heat and Smoke Removal Fans has been designed and tested for heat, and smoke removal with horsepower's up to 15 HP and CFM up to 56,000 cfm.

Construction:

- Sturdily constructed belt drive roof exhausters for industrial and commercial applications.

- Galvanized steel wind-band and rain-proof butterfly dampers.

- Cast iron pillow block bearings (out of air stream), complete with external grease fittings.
- Galvanized steel wind-band & rain-proof butterfly dampers that rotate easily on brass bushings.
- Cast aluminum blades.

- Heavy duty sheaves and belts out of air stream.

- Totally enclosed ball bearing motors (clean dry air, maximum 200° F).

- Available accessories include roof curbs, disconnect switches and explosion proof motors.
- Direct Drive fans require little maintenance and are best controlled with VFD speed contollers

Shipping Dimensions and Weight:

Main System Part #	Height x Width x Depth	Weight
LF-RTA-60	"H x "W x "D	0 lbs
LF-RTA-54	"H x "W x "D	0 lbs
LF-RTA-48	"H x "W x "D	0 lbs
LF-RTA-42	"H x "W x "D	0 lbs
LF-RTA-36	"H x "W x "D	0 lbs
LF-RTA-30	"H x "W x "D	0 lbs
LF-RTA-24	"H x "W x "D	0 lbs
LF-RTA-18	"H x "W x "D	0 lbs

Key Buying Criteria:

The upblast rooftop fan ejects the air from the building straight up into the atmosphere. The upblast roof mount fan use a butterfly type damper and rain gutter design so that when the fan is off no rain can enter the building. CFM's for these rooftop fans range from 5,000 to 30,000. These roof ventilators come in direct drive configurations. The belt drive units are typically quieter, and can usually move air at a higher CFM then the direct drive unit. Rooftop fans with axial blades move more air, but do not work as well with high static pressures. Whereas the centrifugal wheeled fan is typically quieter and works more efficiently where static pressures are moderate to high.

Suitable For:

Top 5 contaminants/processes/applications:

• Suitable for General Ventilation and Local Exhaust Ventilation applications where little to no external Static Pressure is required. Heavy duty commercial applications and light duty industrial applications. Low levels of dust, fumes and gases can be processed with these fans with the understanding that all codes are follows (EG: NFPA explosive gases & Dust, OSHA, etc.

Don't see your contaminants? Give us a call at 1-888-862-5356 or email us at sales@lev-co.com!

IMPORTANT: For your Health and Safety, make sure to talk to an application engineer before purchasing.