Animated diagram for Exhaust Fans & Controls

Exhaust Fans & Controls

Fans for air make up and exhaust are quite often a difficult product to find when designing a simple ducted local exhaust system. Here we offer a variety of "LEV" (Local Exhaust & Ventilation) fans specifically designed to meet the demands of such systems. These Fans are able to handle specific applications such as: - Corrosive Fumes - Abrasive Dusts - Proper Flow and Static Pressure for a particular application.

Please feel free to contact one of our System Design Technicians for help in selecting the right fan for your application.
13-001
LD Direct Drive - Self Cleaning Wheels - Inverter Duty - (1,000 - 21,000 CFM)
ld-bi-backward-incline-direct-drive-exhaust-fan-medium-pressure - Main Image
Direct Drive Fans, Arr. #4 c/w punched flanged outlet, slip fit inlet, motor, motor mounting support and drain. Motors are TEFC E-Pact 230-460V/575-600V/3/60/-3500 RPM. Wheels are heavy gauge, single thickness, backward inclined, dynamically balanced to ANSI S2.19-1989 specifications for smooth operation.
NB: All Lev-Co LD fans come in a standard configuration of Clockwise rotation / Up-blast discharge. For alternate rotations and discharges, please indicate on your purchase order and approved submittal drawings
Attachments
001 - Equipment Specification and Dimension Drawings:
003 - Client Installations - Case Studies with Photos:
006 - Local Exhaust and Ventilation Duct 3D Layouts:
017 - LEV CAD Blocks (Auto CAD, RVT, SLDPRT):
13-002
BI Belt Driven Fans (1000 – 21,000 CFM)
bi-belt-driven-fans - Main Image
Belt Driven Fans c/w punched flanged outlet, slip fit inlet, OSHA belt guard, v-drive, motor, motor mounting support. Motors are TEFC E-Pact 230-460V/575-600V/3/60/-3500 RPM. Wheels are heavy gauge, single thickness, backward inclined, dynamically balanced to ANSI S2.19-1989 specifications for smooth operation.
13-003
P-Max - Direct Mount to Arms, Hose Reels... (200 - 2,300 CFM)
p-max-exhaust-fan - Main Image
P-Max© "Local Exhaust" fans are recommended for applications involving fume, smoke and light dust. Suitable for direct mounting to a mounting bracket, most extraction arms, filter units, hose reels and simple hose drops.
NB: All Lev-Co P-max fans come in a standard configuration of clockwise rotation/top horizontal discharge. For alternate discharges, please indicate on your purchase order and approved submittal drawings. Alternate rotation is not available.
Attachments
001 - Equipment Specification and Dimension Drawings:
001a - How to Install (How to install local exhaust system, Isometric and Exploded Views):
002 - Brochures:
006 - Local Exhaust and Ventilation Duct 3D Layouts:
007 - Written Specifications:
017 - LEV CAD Blocks (Auto CAD, RVT, SLDPRT):
13-005
Wall Fan - General Ventilation - Horizontal Discharge: 1,400 - 5,500 CFM
ax1v-axial-fan - Main Image
Model LAX1V fans are sturdily constructed, direct drive, horizontal discharge for industrial, commercial and farm applications. Suitable for general ventilation of factories, garages, warehouses, and other commercial and industrial buildings.
STANDARD FEATURES:
  • Built-in shutters that automatically open when the fan starts and gravity closes when the fan stops
  • heavy duty aluminum housing
  • Plated steel OSHA motor mount/guard
  • Single or variable speed operation
  • Aluminum fan blades on steel hub
  • Totally enclosed motors
Attachments
001 - Equipment Specification and Dimension Drawings:
003 - Client Installations - Case Studies with Photos:
006 - Local Exhaust and Ventilation Duct 3D Layouts:
017 - LEV CAD Blocks (Auto CAD, RVT, SLDPRT):
13-007
Non Tempered (Neither heated or cooled) Make-Up Air - Low Cost Make Up Air - (5,000 - 30,000 CFM)
non-tempered-air-makeup-systems - Main Image
LEV-CO’s Non-Tempered Air Make-Up Systems replaces exhausted air more efficiently and with more comfort than conventional Air Make-Up air systems. Ideal for production facilities that generate heat, for example welding shops where welding processes generate up to 450,000 BTU per hour per welder.
Non-Tempered units are grouped into 2 different types:
  • 100% Outdoor Air: These units draw outside air and consist of a simple Axial fan, motorized inlet damper, Insulated cabinet and flow straightener.
  • Modulating units – 0-100% Outdoor air: these units draw a variable amount of outside air from outside and when the internal temperature drops below the customer’s set point (EG: 70 degrees F) the THERMOSTAT controlled modulating air-mixing system allows air to be drawn from OUTSIDE or INSIDE in order to maintain desired indoor temperature. This solution is most often selected when the production level cannot be guaranteed or additional heat sources are not available.
Both solutions are aided by custom engineered flame retardant fabric distribution ducting, where we able to take advantage of the STRATIFIED heat in ceiling, creating the equivalent of lowering a conventional thermostat by ½ degree F per foot of ceiling height or provide MAKE-UP without additional heat.
This is accomplished by discharging the air in HIGH velocity air jets as close to the ceiling as possible. The result of the mixing is that the fresh air is heated to room temperature very quickly before it reaches the lower occupied area. This is extremely effective in welding shops where each welder can generate as much as 450,000 BTU per hour in heat.
This “De-Stratifying” air distribution method has the added benefit of diluting and cooling any “Fugitive emissions/smoke” in the ceiling space and allows this air to be drawn down to floor level where it can be filtered and or exhausted by local exhaust ventilation systems.
When no fresh air is needed, the system can be shut down and the outside air dampers will close automatically or the system can be run on one hundred percent (100%) re-circulated air.
Conversely, if cooling air is required, “Bi-Flex” ducting can be selected (Optional). Bi-Flex ducting allows the air to continue to be exhausted into the ceiling space in the winter months AND then be re-directed downwards to the workers in summer months. This method leaves the bulk of the hot air in the ceiling space and places high velocity cooling air towards the worker. (The velocity shall not be high enough to disturb welding gases/processes).
Attachments
001 - Equipment Specification and Dimension Drawings:
003 - Client Installations - Case Studies with Photos:
006 - Local Exhaust and Ventilation Duct 3D Layouts:
017 - LEV CAD Blocks (Auto CAD, RVT, SLDPRT):
13-008
Roof Fan - General Ventilation - Vertical Discharge - (2,800 - 7,000 CFM)
rta-series-belt-drive-roof-exhauster - Main Image
Roof mounted, belt driven exhaust fan for ducted or non-ducted applications
Attachments
001 - Equipment Specification and Dimension Drawings:
006 - Local Exhaust and Ventilation Duct 3D Layouts:
017 - LEV CAD Blocks (Auto CAD, RVT, SLDPRT):
13-010
DFRC-ES Series Inline Duct Fans
dfrc-es-series-inline-duct-fan - Main Image
High efficient inline duct fans are ideal for residential and commercial ventilation applications such as range hoods, bath fans & dryers.
  • Available in 4”, 5”, 6”, 8”, 10” and 12” diameters.
  • Quiet and efficient backward curved impeller
  • Powerful, efficient external rotor motor
  • Speed controllable with Canarm MC series controls
  • High flow against high static pressure
  • Remove noise from main living area by mounting remotely
  • Quick and easy installation.
13-013
VFD System with Manual Dampers and Pressure Transmitter - Type 2
vfd-type-2-pressure-control - Main Image
Lev-co’s LEVEL 2 VFD system allows for “On-Demand” flow control of an exhaust fan for industrial ventilation applications.

  • The fan is first activated by an "Optional" switch attached to the damper, hose reel, hose drop, current sensor*, etc. When this switch closes the fan turns on.
  • Once the damper in the 1st drop opens, a digital pressure transmitter senses the pressure in the main duct downstream of the fan and allows the VFD to actively control motor speed as a function of duct (negative) pressure.
  • As more dampers are opened and closed the fan speed increases and decreases in order to provide the required flowrate at each drop. This permits constant, effective exhaust at a target duct pressure no matter how many dampers are open or closed. Flow "On Demand"
  • The fan turns off when the last operator has no more demand
The following components are included in this “Level 2” VFD solution:
  • VFD (Variable Frequency Drive)IP65
  • Control Panel IP65 c/w with the following components:
  • HOA Hand/Off/Auto selector switch
  • ”Fan on” Pilot Light
  • Pressure Transmitter 4-20 ma
  • Digital Pressure Gauge 1-10” WG
  • 100’ of pneumatic tubing
  • 1/8” MPT hose barb (for connection to duct)
13-014
VFD System with Powered Dampers and Pressure Transmitter: Type 3
vfd-type-3-pressure-and-damper-control - Main Image
Lev-co’s LEVEL 3 VFD system allows for “On-Demand” flow control of an exhaust fan for industrial ventilation applications.

  • The fan is first activated by an "Optional" switch attached to the hose reel or hose drop. When this switch closes the fan turns on and opens the first motorized damper.
  • Once the damper in the 1st drop opens, a digital pressure transmitter senses the pressure in the main duct downstream of the fan and allows the VFD to actively control motor speed as a function of duct (negative) pressure.
  • As more dampers are opened and closed the fan speed increases and decreases in order to provide the required flowrate at each drop. This permits constant, effective exhaust at a target duct pressure no matter how many dampers are open or closed. Flow "On Demand"
  • As each hose reel or hose drop returns to its stored position, the damper on each drop closes.
  • The fan turns off when the last operator returns the hose to its stored/recoiled position
The following components are included in this “Level 3” VFD solution:
  • VFD (Variable Frequency Drive) IP55
  • Control Panel IP55 c/w with the following components
  • HOA Manual/Off/Auto selector switch
  • Step-Down transformer used to supply 24 volt dampers
  • ”Fan on” Pilot Light
  • Pressure Transmitter 4-20 ma
  • Pressure Gauge 1-10” WG
  • 100’ of pneumatic tubing
  • 1/8” MPT hose barb (for connection to duct)
13-015
BI Direct Drive - Self Cleaning Wheels - Inverter Duty - (1,000 - 21,000 CFM)
bi-direct-drive-fans - Main Image
Direct Drive Fans, Arr. #4 c/w punched flanged outlet and motor. Motors are TEFC E-Pact 230-460V/575-600V/3/60/-3500 RPM. Wheels are heavy gauge, single thickness, self-cleaning wheels, dynamically balanced to ANSI S2.19-1989 specifications for smooth operation. Inlet and supporting bracket accessories are also available.
NB: All Lev-Co BI fans come in a standard configuration of Clockwise rotation/Up-blast discharge. Alternate discharges can be adjusted by the installing contractor.
Attachments
001 - Equipment Specification and Dimension Drawings:
13-019
C Series BI Direct Drive - Self Cleaning Wheels - Inverter Duty: (1,000 - 21,000 CFM)
c-series-bi-direct-drive-high-pressure-fan - Main Image
LEV-CO C Series Direct Drive Fans: Arrangement #4 c/w punched flanged outlet and motor. Motors are TEFC E-Pact 230-460V/575-600V/3/60/-3500 RPM. Wheels are heavy gauge, single thickness, backward inclined, dynamically balanced to ANSI S2.19-1989 specifications for smooth operation. Inlet and supporting bracket accessories are also available.
NB: All Lev-Co BI fans come in a standard configuration of Clockwise rotation / Up-blast discharge. Alternate discharges can be adjusted by the installing contractor.
13-021
Nema 4X VFD 1HP-20HP
nema-4x-vfd-single-phase-input - Main Image
Dust Tights and water tight VFD's for indoor or outdoor use.
13-025
AFS Direct Drive Fans
afs-direct-drive-spark-proof-medium-pressure-backward-curved-fans - Main Image
Direct drive fans from 1 HP to 10 HP
Attachments
001 - Equipment Specification and Dimension Drawings:
13-035
Direct Drive Pressure Blowers
direct-drive-pressure-blowers - Main Image
Direct drive pressure blowers with PREMIUM EFFICIENCY TEFC motors from 1/3 HP up to 75HP. Ideal for High and ultra high pressure installations up to 100" TSP.
Attachments
001 - Equipment Specification and Dimension Drawings:
13-041
Portable P-Max - Optional Hose, Nozzles... - (600 -1,500 CFM)
portable-p-max-vehicle-exhaust-fan - Main Image
P-Max© "Portable Local Exhaust" fans. Recommended for applications involving vehicle exhaust gases, welding fumes, smoke and light dust. An excellent portable solution where a fixed mounted system is not possible. These fans are designed specifically for "Medium Pressure" applications where the fan must be able to overcome the air resistance created when drawing contaminants through hoses.
Attachments
001 - Equipment Specification and Dimension Drawings:
017 - LEV CAD Blocks (Auto CAD, RVT, SLDPRT):
13-075
Dust Collector Control Panel - Type 2 VFD System with shaker
vfd-type-2-with-pressure-and-control-for-dust-collector-shaker-motor- - Main Image
Type 2 VFD exhaust system with shaker motor filter cleaning. Provides standard type 2 system performance (see 13-13) plus timed off-line filter cleaning with manual override. Indicators provided for fan running and filter cleaning in operation. Many standard and custom options available. Available with Invertek or ABB VFDs.
13-101
MOVEX-F-FANS
movex-f-exhaust-fans-with-aluminum-wheel - Main Image
The Movex FB represents a range of radial fans for the extraction of gases, smoke and small particles. For airflows ranging from from 200 to 8000 cfm.

Movex new fan FB is adapted to the specific requirements of local exhaust ventilation systems and evacuation of gases, smoke and small particles. For example in:

-Welding
-Vehicle exhaust gases.

Developed with a strong focus on performance and design:

-For airflows from 200 to 8000 cfm
-High energy efficiency, sustainability and carbon reduction

There are a number of accessories available for the FB range to make installation and use easier and more efficient.
Attachments
001 - Equipment Specification and Dimension Drawings:
13-121
VFD System with Manual Dampers and Speed Potentiometer: Type 1
vfd-type-1-speed-control - Main Image
Lev-co’s LEVEL 1 VFD system allows for simple VFD speed control, acceleration and deceleration and sound level management for all of Lev-co's exhaust and filtration solutions.

  • The fan is activated by a small local control panel.
  • Acceleration and deceleration settings can be programmed into the VFD in order to eliminated "Peak" demand charges and feedback from the motor.
  • As required, the flow rate can be increased and decreased according to the demand required by the application.
  • Additionally, great reductions in sound level can be achieved by adjust the flow
  • The following components are included in this “Level 1” VFD solution: VFD (Variable Frequency Drive)IP55, Simple potentiometer speed control plus on/off switch and fan running indicator
13-911
Accessories for Variable flow control system
vfcs-accessories-for-variable-flow-control - Main Image
Accessories for Variable controls systems can be complex. You will find all of the items you will need on this list to put one of these systems together yourself. For help putting together one of these systems please give us a call.