Plasticair’s SKYPLUME G1-ELMV & ELLV – DMF series of FRP Lab Exhaust Fans have been specifically designed for exposure to gas streams containing corrosive fumes. The rugged mixed flow impeller and robust housing offer favourable features such as corrosion resistant FRP construction for all gas contact parts. These units operate at high efficiencies while maintaining a quiet operation. Industries such as Waste Water Treatment, Pulp and Paper, Research Laboratories and Chemical Manufacturing will benefit from utilizing this product as it provides industrial quality, and long life.


SKYPLUME G1-ELMV & ELLV (Extended Lobe) Fans incorporate a Mixed Flow unit, complete with Medium or Low velocity nozzle design in addition to integral wind-band to maximize dilution ratios. Plasticair has achieved certified induction ratios between 233%-267%. This patented and enhanced design maximizes both plume height and dilution versus horsepower. Arrangement # 4 – direct drive option is available and it AMCA certified. Our construction is comprised of a UV stable FRP, which provides maximum corrosion resistance and strength. All of Plasticair’s standard designs meet a 125 MPH (201 kmh) wind load. 150 MPH (241 kmh) wind load construction is available upon request.

Designed for industrial and institutional applications, the housing is solid FRP throughout. All FRP exposed to the corrosive gas stream is constructed with a resin rich corrosion barrier complete with C-veil. Airstream straightening sections are designed into the 6 ducts that extend from the exterior to the interior which are also designed for motor excess. The motor is completely protected from the toxic airstream and is only exposed to outside or ambient air.

Standard Features

• Motor Located out of air stream.
• FRP (Rust Proof) Mixed Flow wheel design.
• FRP (Rust Proof) SKYPLUME stack.
• All FRP 0-25 flame spread per ASTM-E84.
• Inlet: FRP roof curb cap.
• 316/304 ss hardware.
• FRP Shaft Sleeve.
• Design to 125 MPH wind-load.
• Direct Drive Arrangement # 4 – Direct couple

Inlet Plenum:
• FRP Rust Proof UV Stable – 25 year wall warranty against failure due to rust and UV attack.
• Single wall
• Double wall with 2” insulation
• Energy recovery run around coils
• Bypass ss Dampers – Constructed in FRP, 316 ss, 304 ss, Aluminum epoxy coated, Galvanized.
• Damper electric actuators.
• Other materials of construction available: 316 ss, 304 ss, Galvanized, Mild Steel Epoxy coated.

Spark Resistant Construction:
• NEMA 3R disconnect switch, mounted and wired.
• NEMA 3R, 7, 9 explosion proof disconnect switch, mounted and wired.
• Class 1 Division Motors.
• Fans are Graphite lined with grounding Kit – Spark Proof.

Factory Assemble Systems:
• Common rail system under Fans and Plenum – FRP coated – rust proof.
• Energy recovery run around coil.

Silencer Packages:
• Stainless Steel Silencer built into SKYPLUME G1 ELMV & ELLV stacks.
• Stainless Steel Silencer built into bypass dampers an intake plenum.
• Self-Supporting designs available up to 200 km (125 MPH) wind load.

Roof Curbs:
• Heavy Duty galvanized roof curbs – up to 7 gauge construction.

Vibration Isolation Packages:
• 1” spring – housed and restrained.
• 2” spring – housed and restrained.
• Isolation dampers – constructed FRP, 316 ss, 304 ss.
• Isolation dampers – Aluminum epoxy coated construction.

Available Motors: VFD Ready, Premium Efficiency Mill and Chemical Duty, Explosion Proof.
Flexible Inlet connections
Nexus lining for use with Hydrofluoric Acid
Gravity type back draft dampers
Weather Cover – OSHA standard

Fans and stacks shall be designed and constructed so that the gas stream only contacts solid FRP surfaces.

• All FRP will be 0-25 Flame spread as per ASTM-E84.
• The complete system shall be designed to a wind load rating of 125 MPH.
• All steel fasteners shall be 316 stainless steel.
• Motor shafts will be fully protected from exposure to the gas stream by FRP shaft sleeves.
• The fan shall be constructed per AMCA Standards 99.
• The fan arrangement will be based on AMCA 99 and will be Direct Drive AMCA arrangement #4.

Acceptable Manufacturers: Plasticair Inc.

Air Performance

• The performance ratings are to be in accordance with AMCA 260. No other performance standard or test will be accepted.
• Fan Manufactures Catalog will be published and accessible from the AMCA web site certified ratings program.
• Sound levels, Horse Power Levels are not to exceed scheduled values.
• Plume Heights are to be calculated using the wind band volume by using the ASHREA Briggs Effective plume height calculation and are not to be less than scheduled values.
• Wind band volumes and velocities are not to be less than scheduled values and are derived from AMCA 260 testing.

Fan Outlet Nozzle and Wind band

• The fan discharge will be fitted with a UV stabilized FRP exit nozzle and attached conical FRP wind-band.
• The nozzle assembly will be designed to dilute outside air with the primary exhaust gas stream.
• Dilution rates are to be achieved within the nozzle assembly and shall not be less than the scheduled rate.
• The nozzle assembly will be supported by the fan housing without the need for guy wires or additional supports and the manufacturer will warranty the stack against failure due to rust for 25 years.
• The outer surface of the nozzle and wind-band will be UV stabilized gel coat.
• Manufacturer will provide and honor a 25 year full replacement warranty against failure due to rust.

Housing Construction

• The fan housing is to be solid FRP throughout.
• The outlet and inlet flanges are to be of heavy industrial quality.
• All flanges are to have factory flat finishes.
• The materials of construction will be premium quality vinyl ester resin and reinforcing glass throughout.
• The entire surface exposed to the gas stream will be complete with a resin-rich corrosion barrier consisting of C-veil and a smooth finish.
• The outer surface of the housing will be of a heavy UV stabilized gel coat.
• The housing shall include a machined Teflon shaft seal to limit gas leakage.


• The impeller is to be of a high efficiency mixed flow design.
• The materials of construction will be premium quality vinyl ester resin and reinforcing glass throughout.
• The method of construction is to be hand lay-up only.
• The entire surface of the impeller exposed to the gas stream will be complete with a resin-rich corrosion barrier consisting of C-veil and a smooth finish.
• The shaft is to be attached to the back -plate of the impeller by way of a taper lock bushing and a one piece cast sprocket hub.
• The entire shaft attachment assembly shall be completely covered with a minimum 0.25″(6 mm) of FRP lay-up.


• Bearings are to be ball bearing or spherical roller type located inside the motor.
• The bearings are to be rated and designed for a minimum L-10 life of 110,000 hours.
• The bearings are to be located out of the air stream.
• The method of lubrication will be grease per the motor manufacturer’s recommendations


• The materials of construction will be as per the fan housing.
• Dampers, controls and other options will be as detailed in the schedule.
• Plenums are to be rust proof single wall FRP construction.
• Plenum to be designed so that actuators are mounted out of the primary airstream.
• One piece construction with a leak test showing zero leakage up to 20” positive pressure.
• Refer to the schedule for plenum and damper details.


• Premium Efficiency Motor will be C-Flange mounted, totally enclosed fan cooled motor with a 1.15 service factor.
• The motor will be VFD ready.


• Motor shaft will be 1045 carbon steel complete with the correct keyways to accept V-belt drive selections.
• The impeller side of the shaft shall be complete with an FRP shaft sleeve, which is bonded to the back-plate of the impeller and protrudes through the housing.
• The outside diameter of the sleeve is machined to provide a minimum clearance gap with the Teflon shaft seal.

Belt Drive

• Belt Drive Fans are not permitted

Balancing and Testing

• All fans shall be completely assembled and test run as a unit at the specified operating speed prior to shipment.
• Balancing of the impeller shall be achieved only with the use of the identical material used to fabricate the impeller.
• Balancing shall be in accordance with ASTM D-4167.
• The fan shall be test run at operating speed and not shipped until vibration readings are within acceptable limits. Acceptable limits are as per G2.5.
• Records shall be maintained and a written copy shall be available upon request


• The supplier shall warrant that all system components shall be free from defects in materials and workmanship for a period of 15 months from date shipped or 12 months from equipment start up, whichever occurs first.

• Extended warranty on failure do to rust on induction stack shall be honored to 25 years from date of purchase.