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P.O. Box 410, Schofield, WI, 54476, USA

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Rectangular Bubble-Tight Dampers for lower pressure drops.

Aug 15, 2017

Square blade, model HBT-221, commercial grade rectangular bubble-tight damper. Features replaceable blades and flanged frame for mounting. Product tested to AMCA 500-D up to 10 in. wg (2.5 kPa). Available with manual, pneumatic or electric operation. Applications include isolation or decontamination in medical facilities, test laboratories and food processing plants.

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Thermal & Heating Equipment

High Turndown Furnace is equipped with microprocessor.

Jul 18, 2017

Offering up to 16:1 seamless turndown per furnace, High Turndown Furnace is suitable for variable volume applications. Available on IGX make-up air unit,ERCH dedicated outdoor air unit, RV and RVE rooftop ventilators, product is ideal for schools, hospitals, hotels, and commercial office buildings. Unit provides minimum firing rate and lower furnace cycling on part-load.

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Rooftop Ventilation Line comes with 45 tons of cooling capacity.

Jun 21, 2017

Featuring 2 in. R13 foam insulation, Rooftop Ventilation Line offers heating capacity of 800 Mbh and performance capacity up to 13,500 cfm. Available in RV and RVE models, unit is suitable for schools, offices and government buildings applications.

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Architectural and Civil Engineering Products

Thinline Louvers are made of heavy-gauge aluminum.

Jun 01, 2017

Available in ESU-153 and ESU-154 models with blades positioned at 30° and 48° angles respectively, Thinline Louvers come in 96 in. x 48 in. single section size in frameless configuration. Suitable for interior and exterior applications, units can be installed on packaged terminal air conditioning system as exterior grilles.

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Model SMD-401EF Smoke Damper features air foil blades.

Mar 25, 2017

Available in sizes up to 192 in. wide x 120 in. high with wide range of actuators in modulating or two-position operation, Model SMD-401EF Smoke Dampers are rated to 3000 fpm and pressures up to 6 in. wg. for horizontal and vertical installations. Featuring extruded aluminum frame, units meet UL 555S Class I leakage standards.

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Model APD Plenum Fan features galvanized steel frame.

Jan 25, 2017

Operated up to18000 cfm and 10 in.wg of external static pressure, Model APD Plenum Fan features compact size and coated 7-bladed backward-curved steel wheel. Used as single fan or in parallel fan array applications, unit eliminates cost required in maintaining belt drive plenum fans. Constructed from formed and bolted galvanized steel frame, Plenum fan can be combined with VFD to control air... Read More


Bathroom Exhaust Fan supports wall mounting.

Oct 19, 2016

With overall depth of 3.625 in., direct-drive Model SP-L is purpose-built for 2 x 4 wall installation and can eliminate need for ceiling radiation damper. Unit comes in 50 and 80 cfm models, offering quiet operation and effective moisture and air ventilation. Available with selection of electrical accessories and control options, slotted mounting brackets, backdraft damper, and steel... Read More

Chemicals & Chemical Processing, Food Processing & Preparation, HVAC

Self-Cleaning Hood System drastically reduces grease build-up.

Sep 21, 2016

By cleaning both sides of filters in place along with inside of exhaust plenum, Accurex GWAE Auto Scrubber Hood System eliminates need for daily removal and cleaning. Product features 2 in. gravity drain that captures grease from pitched grease trough, single control panel that controls multiple hood sections or duct sumps, and tool-less access panels that facilitate maintenance and inspection.... Read More

Architectural and Civil Engineering Products

Wind-Driven Rain Louver features dual module design.

Aug 30, 2016

Providing for high volume intake and exhaust ventilation, Model EVH-901 protects against water penetration, even under severe wind-driven rain conditions. Unit incorporates horizontal blade front module and vertical blade rear module. Manufactured of extruded aluminum, louver can be specified with variety of finishes. Product is AMCA 540 and 550 Listed for Wind Borne Debris and High Velocity Wind... Read More


Rooftop Ventilation Systems feature low-sound condenser fans.

Aug 10, 2016

With capacities up to 13,500 cfm, up to 45 tons of cooling, and 800 Mbh heating, pre-engineered Models RV and RVE are specifically designed for dedicated outdoor air and high-percentage outdoor air applications, making them suited for schools, offices, and government buildings. Low sound condenser fans offer sound power reduction of 5–8 dB when compared to standard condenser fans. Optional... Read More


Fume Exhaust Fan Packages are designed per ANSI Z9.2 standard.

Jun 22, 2016

Offering extended discharge, FumeJet Models FJC and FJI minimize and prevent exposure to harmful fumes and odors outdoors. Pre-engineered centrifugal units provide compact footprint with motors and drives located under common weatherhood, and configurable mounting options to suit building layout. Fan and stack assembly withstands wind speed of 92 mph without need for guy wires. With max... Read More

Controls & Controllers, Green & Clean, HVAC

Variable Speed Control increases ventilation system efficacy.

May 25, 2016

Mounted internally within fan housing to eliminate voltage spikes that can contribute to motor performance issues/failure, Vari-Green™ Drive (Model VGD-100) optimizes energy savings and efficiency of ventilation systems in diverse applications. This preprogrammed, factory mounted and wired variable speed control, intended for 3-phase motors up to 10 hp, uses R3 filtering technology to reduce... Read More


Direct Drive Plenum Supply Fans include make-up air models.

Mar 29, 2016

DGX-22-OpenGreenheck make-up air Models DGX and MSX can be configured with direct drive, backward-curved plenum supply fan. Both models offer operating range capable of 800–25,000 cfm and external static pressure up to 4 in. wg. DGX-P and MSX-P offer additional features for when applications require higher external static pressures. Along with factory-mounted VFD that provides... Read More


Mixed Flow Inline Fans come in 11 sizes from 9-33.

Mar 02, 2016

Supporting ratings up to 26,000 cfm and static pressure up to 3 in. wg, Model EQB bears AMCA Seal for Sound and Air Performance. Octagonal housing, manufactured of formed galvanized steel panels coupled with heavy-gauge steel drive frame, lends to strength and durability, while aluminum mixed flow wheel promotes efficiency and minimizes sound levels. Universal mounting supports,... Read More

HVAC, Safety & Security Equipment

Fire/Smoke Dampers protect non-concrete fire rated barriers.

Feb 04, 2016

Available in fire and combination fire/smoke models, DFD, FD, and FSD Series Dampers are approved for installation in horizontal, non-concrete, fire rated barriers. Units can be specified for use in UL floor/ceiling design I503, which consists of 2-hour fire rated floor/ceiling assembly made from steel studs and gypsum board. Installation method simplifies difficult task designers and... Read More

Architectural and Civil Engineering Products

Vertical Blade Louver is hurricane zone approved.

Jan 13, 2016

Made of extruded aluminum, Model EVH-501D incorporates drainable head member and 5 in. deep vertical rain-resistant blades. Stationary louver is Florida Building Code Approved for use in High Velocity Hurricane Zone and Miami-Dade Approved for use where room behind louver is not designed to drain water penetrating into room or room will house non-water resistant or waterproof equipment.... Read More


Dynamic Fire and Fire/Smoke Dampers come in large sizes.

Nov 19, 2015

Non-actuated, 1.5 hr dynamically rated fire damper, Model DFDAF-310, is available in widths up to 144 in. and heights to 100 in. Electronically actuated, 1.5 hr fire resistance-rated airfoil blade combination fire-smoke dampers include Models FSD-311 and FSD-312, which also come in widths up to 144 in. and heights up to 100 in. Read More


Industrial Blast Dampers protect against pressure changes.

Oct 09, 2015

Qualified to pressures as high as 15 psi, Models HBS-430 and HBS-431 protect against blasts and instantaneous pressure changes. These heavy-duty, double-flanged, channel frame-style dampers feature double thickness fabricated airfoil blades and cover applications in UFC and GSA codes and standards, including Charge Weight I at 82 ft. Areas of use include government buildings, mining, oil and... Read More

Fluid & Gas Flow Equipment, HVAC, Waste Management & Waste Handling Equipment

Pollution Control Unit meets UL-1978 standard.

Sep 18, 2015

Using 3-stage mechanical filter arrangement, Grease-Trapper PCU removes grease, smoke, and odors from kitchen exhaust air. Activated carbon panels remove odor molecules prior to discharging air, reducing impact of exhaust to surrounding areas. Built in accordance with NFPA 96, Grease Trapper offers capacities up to 12,000 cfm and uses MERV filters to ensure minimum overall particulate removal... Read More

Green & Clean, HVAC

Energy Recovery Ventilator is AHRI certified and ETL listed.

Aug 07, 2015

Utilizing total energy core, Model ECV provides 500–1,000 cfm of preconditioned fresh outdoor air for commercial/institutional applications. Energy core technology, applied to building's ventilation system, reduces heating and cooling loads to promote energy conservation. Hinged doors facilitate maintenance access to internal components and control center, while optional... Read More

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