Laboratory Exhaust Systems

Transcription

1 Laboratory Exhaust Systems Vektor -H Performance High Plume April 07

2 Laboratory Exhaust Systems Model Vektor -H Table of Contents Vektor-H Specification Chart.... Plume Height Calculation... Quick Select Chart... Air Density Correction Factors...- Reading Fan Curves.... Air Data and Fan Curves....- Sound Instructions & Reading Sound Data... Sound Data Licenses and Certifications AMCA Greenheck Fan Corporation certifies that the Model Vektor -H lab exhaust fans shown herein are licensed to bear the AMCA seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication and Publication and comply with the requirements of the AMCA Certified Ratings Program. The AMCA Certified Ratings Seal applies to sound and air performance. UL/cUL 70 Power Ventilators Vektor-H models are available with the UL/cUL 70 Listing on a wide variety of 0 and 0 hertz motors. This listing ensures the use of UL approved electrical components. Motors are available in NEMA totally enclosed, fan cooled (TEFC), or explosion proof (EXP) designs. UL/cUL 7 Power Ventilators for Restaurant Exhaust Appliances UL/cUL 7 is concerned with fans designed for removal of smoke and grease laden vapors and is designed to withstand the demands of high temperature kitchen grease exhaust. The Vektor-H is an alternative for kitchen applications when the requirement for a high plume rise is deemed necessary. Model Vektor-H is available with the UL/cUL 70 Power Ventilators File #E0 Model Vektor-H is available with the UL/cUL 7 Power Ventilators for Restaurant Exhaust Appliances Maximum Operating Temperature ºF File #MH7 Standards ANSI/AIHA Z9. Laboratory Ventilation American National Standards Institute, Inc. NFPA Standard on Fire Protection for Laboratories using Chemicals NFPA 90A Installation of Air Conditioning and Ventilating Systems NFPA 9 Exhaust Systems for Air Conveying of Materials

3 Vektor-H Specifications Nozzle Diameter Nozzle Area (ft ) Nozzle Diameter Nozzle Area (ft ) Lifting Lugs Nozzle Size A* B C D Weight (lbs)** A Extension Tube Fan B Inside Square D. inches Lab Exhaust C * A dimension is for fan without bypass air plenum. ** Weight does not include motor or drive pulleys. All dimensions given on this page are in inches. Data shown on this page is for general information only and should not be used for exact installation dimensions. For detailed dimensional data please refer to the appropriate submittal drawing. Chemical Emission and Odor Dispersion Plume Height Calculations The effective plume height is an important factor in designing exhaust systems servicing laboratories. The effective plume height needs to be high enough to avoid exhaust re-entrainment into the same or adjacent buildings. Fan discharge type, concentration levels and airflow volumes all affect the needed effective plume height. The effective plume height (h e ) is the physical height of the fan system (h s ) plus the plume rise (h r ). h r hr he he ASHRAE 0 Applications Handbook (Chapter ) on laboratory design and the Greenheck CAPS program use a geometric formula called momentum flux equation to calculate plume rise (h r ). The formula takes into account downwind distance, height of the building, prevailing wind speed and the terrain factor surrounding the building. hs

4 Adjusting for Plume Height Adjusting the fan system to have additional throw or plume height is achieved by increasing the volume of air through the discharge nozzle. Simply changing the drive pulleys will increase fan speed and volume capacity, thus boosting flow momentum. The additional air through the fan comes from an increase in lab exhaust or an increase of air through a bypass air damper. Utilizing a bypass air damper to increase both dilution and mass of the exhaust air can optimize plume rise. Increased mass improves flow momentum and carries the diluted exhaust higher. Size Quick Select Chart CFM Above Roof (ft) 000 ft/min. 00 ft/min. 0 ft/min. Min 70 Max, Min 0 7 Max, Min 7 8 Max, Min Max,0 Min, Max 7, Min,0 9 0 Max 7,880 9 Min, Max 0, Min,70 Max,70 7 Min,90 8 Max 9,0 7 Min,0 9 Max,000 7 NOTE: All plume rise values are based on,000 ft/min. minimum discharge velocity per ANSI Z9. plume rise calculation at 0 mph crosswind per ASHRAE Applications Handbook. Bypass Air Damper Laboratory Exhaust Bypass Air Laboratory Exhaust Isolation Damper Bypass Air Plenum Bypass Air Plenums Variable volume lab exhaust systems and systems adding bypass air require a bypass air damper and plenum. When calculating necessary pressure, 0. in. wg must be added to the external system to account for the damper. Systems that include an isolation damper must also add 0. in. wg. This chart will narrow fan selection to suit application specifications. When manually selecting a fan it is important to remember that more than one fan is available to meet the desired performance (cfm and Ps). Selection criteria such as unit size, efficiency, speed, outlet velocity, horsepower, or construction material may also dictate which fan is chosen. Air Density Correction Factors Air Elevation (Feet Above Sea Level) Temp. ºF DCF = Density Correction Factor T = Temperature (degrees F) Density Correction Factor Equation DCF = ((T + 0)/0) x.07(e / ) E = Elevation above sea level (feet) Air Density (lb/ft ) = 0.07 / DCF

5 Effects of Air Density When selecting a Vektor-H to operate at a non-standard air density using standard air density tables and curves, corrections must be made to static pressure and brake horsepower. At higher than standard elevations and temperatures, air density will be lower than standard. Therefore, one must determine the static pressure at standard density that will equate to the specified static pressure at the operating density. Since standard air density is greater than operating air density in this instance, one would expect the corrected static pressure to be greater than the operating static pressure. EXAMPLE: The following example shows how to select a Vektor-H Size 8 with a -inch nozzle for 000 cfm,. in. wg, 0 ft. elevation, and ºF temperature.. Since the volume exhausted by the system is not affected by density, cfm remains Select the correction factor from the chart for 0 ft. elevation and ºF. Correction factor is.8.. Multiply specified static pressure (. in. wg) by the correction factor (.8) to determine standard air density equivalent static pressure.. in. wg x.8 =. in. wg. Using the performance tables, enter with. in. wg and 000 cfm.. At the intersection of. in. wg and 000 cfm the fan rpm is 70 and Bhp is... Since the horsepower selected refers to standard air density, this must be corrected to reflect actual Bhp at the lighter operating air. Remember, horsepower is less at a lower air density. Divide the Bhp required (.) by the correction factor (.8) selected previously to determine the Bhp at the new operating conditions./.8 =.7 Bhp. This would require a minimum motor size of hp. Selecting a Vektor-H (Reading Fan Curves) Vektor-H Size 8 Step : -INCH NOZZLE Density 0.07 lb/ft Volume (m /hr x ) NOTE: All plots represent fan operation at standard air (70ºC at sea level) with 0 mph crosswind. Units in the shaded area of each plot do not meet ANSI Z9. criteria (,000 ft/min. minimum outlet velocity). Example A: %WOV = (CFM x 00) / ( x.) hp hp A 000 fpm =.0 ft CFM = fpm =.0 ft CFM = 0 0 fpm =.0 ft CFM = Volume (cfm x ) hp hp Step 7 Step Identify necessary airflow (cfm) and plume rise (ft). Enter the Vektor-H Quick Select Chart located on page and identify unit sizes that can accommodate application requirements. Step : Locate fan size that generally suits requirements. Calculate necessary system pressure including isolation damper, bypass air plenum, and system drop (refer to page ). Enter the Fan Curve with the desired performance specifications: Airflow (cfm), Pressure (in. wg), Outlet Velocity (ft/min.) or Plume Rise (ft). This yields Horsepower (hp) and at the Fan Operation Point. If the given point has a close proximity to a horsepower curve, the next larger horsepower should be selected. Plume rise is ranged by color-coded vertical lines on either side of the operation point and identified by a key in the upper right hand corner of each plot. Step : Calculate the exact % WOV using the equation provided with each fan curve. This value is useful when determining sound power. Lab System A requires a,000 cfm exhaust, ft. plume rise, and. inches of wg after combining lab effluent and bypass air. From the Quick Select Chart, located on page, applicable unit sizes range from Vektor-H- to Vektor-H-. In this example, a Vektor 8 with a -inch nozzle is selected to optimize unit size and required horsepower. Locating this point on the curve, a hp motor operating at 0 rpm is needed to provide a - ft. plume rise at,0 ft/min. Using the equation provided with the Vektor Size 8, -inch Nozzle Chart, the %WOV can be calculated: %WOV = (000 x 00) / (0 x ) = 7% WOV To determine Vektor-H unit sound performance, refer to page.

6 Vektor-H Size 9 -INCH NOZZLE %WOV = (CFM x 00) / ( x 0.8) 000 fpm =.0 ft CFM = fpm =.0 ft CFM = 0 fpm =.0 ft CFM = 0 -INCH NOZZLE %WOV = (CFM x 00) / ( x 0.) 000 fpm =.0 ft CFM = 0 00 fpm =.0 ft CFM = 90 0 fpm = 7.0 ft CFM = Density 0.07 lb/ft Volume (m /hr) 00 hp hp Density 0.07 lb/ft Volume (m /hr) hp hp -INCH NOZZLE %WOV = (CFM x 00) / ( x 0.) 000 fpm =.0 ft CFM = 00 fpm = 7.0 ft CFM = 0 fpm = 8.0 ft CFM = 7-INCH NOZZLE %WOV = (CFM x 00) / ( x 0.8) 000 fpm = 7.0 ft CFM = 00 fpm = 8.0 ft CFM = 9 0 fpm = 9.0 ft CFM = hp hp Density 0.07 lb/ft Volume (m /hr) Density 0.07 lb/ft Volume (m /hr) hp hp 8-INCH NOZZLE %WOV = (CFM x 00) / ( x 0.) 000 fpm = 8.0 ft CFM = fpm = 9.0 ft CFM = 0 fpm = 0.0 ft CFM = 9-INCH NOZZLE %WOV = (CFM x 00) / ( x 0.) 000 fpm = 9.0 ft CFM = 0 00 fpm = 0.0 ft CFM = 0 0 fpm =.0 ft CFM = hp hp Density 0.07 lb/ft Volume (m /hr) Density 0.07 lb/ft Volume (m /hr) hp hp transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Plume rise calculated assuming a 0 mph crosswind.,000 ft/min. is the minimum recommended outlet velocity per ANSI Z9..

7 Vektor-H Size 0 -INCH NOZZLE %WOV = (CFM x 00) / ( x 0.8) 000 fpm =.0 ft CFM = 0 00 fpm =.0 ft CFM = 90 0 fpm = 7.0 ft CFM = 0 -INCH NOZZLE %WOV = (CFM x 00) / ( x 0.) 000 fpm =.0 ft CFM = 00 fpm = 7.0 ft CFM = 0 fpm = 8.0 ft CFM = Density 0.07 lb/ft hp Volume (m /hr) hp Density 0.07 lb/ft Volume (m /hr) 7 00 hp hp 7-INCH NOZZLE %WOV = (CFM x 00) / ( x 0.) 000 fpm = 7.0 ft CFM = fpm = 8.0 ft CFM = 9 0 fpm = 9.0 ft CFM = INCH NOZZLE %WOV = (CFM x 00) / ( x 0.7) 000 fpm = 8.0 ft CFM = fpm = 9.0 ft CFM = 0 fpm = 0.0 ft CFM = hp hp Density 0.07 lb/ft Volume (m /hr) Density 0.07 lb/ft Volume (m /hr) hp hp 00 9-INCH NOZZLE %WOV = (CFM x 00) / ( x 0.9) fpm = 8.0 ft CFM = 0 00 fpm = 9.0 ft CFM = 0 0 fpm = 0.0 ft CFM = Density 0.07 lb/ft Volume (m /hr) 7 00 hp hp Fans are electrostatically powder coated with Labcoat, a polyester resin electrostatically applied coating. Standard color is RAL 70 Concrete Grey. Color match is available for non-standard colors. transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Plume rise calculated assuming a 0 mph crosswind.,000 ft/min. is the minimum recommended outlet velocity per ANSI Z9.. 7

8 Vektor-H Size -INCH NOZZLE %WOV = (CFM x 00) / ( x 0.) 000 fpm =.0 ft CFM = 00 fpm = 7.0 ft CFM = 0 fpm = 8.0 ft CFM = 7-INCH NOZZLE %WOV = (CFM x 00) / ( x 0.7) 000 fpm = 8.0 ft CFM = fpm = 9.0 ft CFM = 9 0 fpm = 0.0 ft CFM = hp hp hp Density 0.07 lb/ft Volume (m /hr) Density 0.07 lb/ft Volume (m /hr) hp hp hp 8-INCH NOZZLE %WOV = (CFM x 00) / ( x 0.8) 000 fpm = 8.0 ft CFM = fpm = 9.0 ft CFM = 0 fpm = 0.0 ft CFM = 9-INCH NOZZLE %WOV = (CFM x 00) / ( x 0.77) 000 fpm = 9.0 ft CFM = 0 00 fpm = 0.0 ft CFM = 0 0 fpm =.0 ft CFM = hp hp hp Density 0.07 lb/ft Volume (m /hr) Density 0.07 lb/ft Volume (m /hr) hp hp hp 0-INCH NOZZLE %WOV = (CFM x 00) / ( x 0.8) 000 fpm = 0.0 ft CFM = 0 00 fpm =.0 ft CFM = 9 0 fpm =.0 ft CFM = 00 -INCH NOZZLE %WOV = (CFM x 00) / ( x 0.98) 000 fpm =.0 ft CFM = fpm =.0 ft CFM = 0 0 fpm =.0 ft CFM = hp hp hp Density 0.07 lb/ft Volume (m /hr) Density 0.07 lb/ft Volume (m /hr) hp hp hp 8 transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Plume rise calculated assuming a 0 mph crosswind.,000 ft/min. is the minimum recommended outlet velocity per ANSI Z9..

9 Vektor-H Size 7-INCH NOZZLE %WOV = (CFM x 00) / ( x 0.) 000 fpm = 8.0 ft CFM = fpm = 9.0 ft CFM = 9 0 fpm = 0.0 ft CFM = INCH NOZZLE %WOV = (CFM x 00) / ( x 0.78) 000 fpm = 8.0 ft CFM = fpm = 9.0 ft CFM = 0 fpm = 0.0 ft CFM = hp hp hp hp hp Density 0.07 lb/ft Volume (m /hr) Density 0.07 lb/ft Volume (m /hr) hp hp hp 9-INCH NOZZLE %WOV = (CFM x 00) / ( x 0.90) 000 fpm = 9.0 ft CFM = 0 00 fpm = 0.0 ft CFM = 0 0 fpm =.0 ft CFM = 70 0-INCH NOZZLE %WOV = (CFM x 00) / ( x 0.99) 000 fpm = 0.0 ft CFM = 0 00 fpm =.0 ft CFM = 9 0 fpm =.0 ft CFM = hp 97 hp hp hp hp Density 0.07 lb/ft Volume (m /hr) Density 0.07 lb/ft Volume (m /hr) hp hp hp -INCH NOZZLE %WOV = (CFM x 00) / ( x.09) 000 fpm = 0.0 ft CFM = fpm =.0 ft CFM = 0 0 fpm =.0 ft CFM = 0 -INCH NOZZLE %WOV = (CFM x 00) / ( x.) 000 fpm =.0 ft CFM = fpm =.0 ft CFM = 7 0 fpm =.0 ft CFM = 0 97 hp hp hp hp Density 0.07 lb/ft Volume (m /hr) Density 0.07 lb/ft 00 Volume (m /hr) hp hp hp hp transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Plume rise calculated assuming a 0 mph crosswind.,000 ft/min. is the minimum recommended outlet velocity per ANSI Z9.. 9

10 Vektor-H Size 8-INCH NOZZLE %WOV = (CFM x 00) / ( x.0) 000 fpm = 8.0 ft CFM = fpm = 9.0 ft CFM = 0 fpm = 0.0 ft CFM = 9-INCH NOZZLE %WOV = (CFM x 00) / ( x.0) 000 fpm = 9.0 ft CFM = 0 00 fpm = 0.0 ft CFM = 0 0 fpm =.0 ft CFM = MAX SYSTEM RESISTANCE hp hp hp hp Volume (cfm x ) Volume (cfm x ) 0 0 Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp hp hp 7 0-INCH NOZZLE %WOV = (CFM x 00) / ( x.) 000 fpm = 0.0 ft CFM = 0 00 fpm =.0 ft CFM = 9 0 fpm =.0 ft CFM = 00 -INCH NOZZLE %WOV = (CFM x 00) / ( x.7) 000 fpm = 0.0 ft CFM = fpm =.0 ft CFM = 0 0 fpm =.0 ft CFM = hp hp hp hp Volume (cfm x ) Volume (cfm x ) 0 Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp hp hp 7 -INCH NOZZLE %WOV = (CFM x 00) / ( x.88) 000 fpm =.0 ft CFM = fpm =.0 ft CFM = 7 0 fpm =.0 ft CFM = 0 -INCH NOZZLE %WOV = (CFM x 00) / ( x.0) 000 fpm =.0 ft CFM = fpm =.0 ft CFM = 0 0 fpm =.0 ft CFM = hp hp hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp hp hp 7 0 transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Plume rise calculated assuming a 0 mph crosswind.,000 ft/min. is the minimum recommended outlet velocity per ANSI Z9..

11 Vektor-H Size -INCH NOZZLE %WOV = (CFM x 00) / ( x.) 000 fpm =.0 ft CFM = 0 00 fpm =.0 ft CFM = 7 0 fpm = 7.0 ft CFM = 80 -INCH NOZZLE %WOV = (CFM x 00) / ( x.0) 000 fpm =.0 ft CFM = fpm =.0 ft CFM = 0 0 fpm = 8.0 ft CFM = hp hp hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp hp hp 7 -INCH NOZZLE %WOV = (CFM x 00) / ( x.8) 000 fpm =.0 ft CFM = fpm = 7.0 ft CFM = fpm = 9.0 ft CFM = The Greenheck Vektor-H laboratory exhaust system can be applied to a single as well as multiple manifolded fume hoods, as shown below Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp hp hp 7 Easy Access Panel Bearing Compartment Ease of Maintenance The Greenheck Vektor-H laboratory exhaust system provides safe, easy inspection and maintenance of internal fan components. By removing one access panel, service to the fan wheel, shaft and bearing assembly is accomplished without removing the fan from the system. Centrifugal Wheel transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Plume rise calculated assuming a 0 mph crosswind.,000 ft/min. is the minimum recommended outlet velocity per ANSI Z9..

12 Vektor-H Size 8 9-INCH NOZZLE %WOV = (CFM x 00) / ( x.9) 000 fpm = 9.0 ft CFM = 0 00 fpm = 0.0 ft CFM = 0 0 fpm =.0 ft CFM = 70 0-INCH NOZZLE %WOV = (CFM x 00) / ( x.97) 000 fpm = 0.0 ft CFM = 0 00 fpm =.0 ft CFM = 9 0 fpm =.0 ft CFM = hp hp hp hp Volume (cfm x ) Volume (cfm x ) 0 0 Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp hp hp 7 -INCH NOZZLE %WOV = (CFM x 00) / ( x.) 000 fpm = 0.0 ft CFM = fpm =.0 ft CFM = 0 0 fpm =.0 ft CFM = 0 -INCH NOZZLE %WOV = (CFM x 00) / ( x.) 000 fpm =.0 ft CFM = fpm =.0 ft CFM = 7 0 fpm =.0 ft CFM = hp hp hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp hp hp 7 -INCH NOZZLE %WOV = (CFM x 00) / ( x.) 000 fpm =.0 ft CFM = fpm =.0 ft CFM = 0 0 fpm =.0 ft CFM = 80 -INCH NOZZLE %WOV = (CFM x 00) / ( x.77) 000 fpm =.0 ft CFM = 0 00 fpm =.0 ft CFM = 7 0 fpm = 7.0 ft CFM = hp 70 hp hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp hp hp transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Plume rise calculated assuming a 0 mph crosswind.,000 ft/min. is the minimum recommended outlet velocity per ANSI Z9..

13 Vektor-H Size 8 -INCH NOZZLE %WOV = (CFM x 00) / ( x.9) fpm =.0 ft CFM = fpm =.0 ft CFM = 0 0 fpm = 8.0 ft CFM = 90 -INCH NOZZLE %WOV = (CFM x 00) / ( x.00) fpm =.0 ft CFM = fpm = 7.0 ft CFM = fpm = 9.0 ft CFM = hp hp hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp hp hp 7 7-INCH NOZZLE %WOV = (CFM x 00) / ( x.08) fpm =.0 ft CFM = fpm = 8.0 ft CFM = 0 0 fpm = 0.0 ft CFM = 0 8-INCH NOZZLE %WOV = (CFM x 00) / ( x.) fpm =.0 ft CFM = 0 00 fpm = 9.0 ft CFM = 9 0 fpm =.0 ft CFM = hp hp hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp hp hp 7 Accessories Plenum Isolation Damper Bypass Air Damper Curb Disconnect Controls Vektor-H with UL 7 The Vektor-H is certified for applications where high temperature and grease are a hazard to the occupied space or outside environment. Choosing a Vektor-H with UL 7 can resolve any existing smoke or odor problems immediately. transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Plume rise calculated assuming a 0 mph crosswind.,000 ft/min. is the minimum recommended outlet velocity per ANSI Z9..

14 Vektor-H Size 0-INCH NOZZLE %WOV = (CFM x 00) / ( x.) 000 fpm = 0.0 ft CFM = 0 00 fpm =.0 ft CFM = 9 0 fpm =.0 ft CFM = 00 -INCH NOZZLE %WOV = (CFM x 00) / ( x.0) 000 fpm = 0.0 ft CFM = fpm =.0 ft CFM = 0 0 fpm =.0 ft CFM = hp 7 hp hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp 0 7 hp hp hp 7 -INCH NOZZLE %WOV = (CFM x 00) / ( x.) 000 fpm =.0 ft CFM = fpm =.0 ft CFM = 7 0 fpm =.0 ft CFM = 0 -INCH NOZZLE %WOV = (CFM x 00) / ( x.00) 000 fpm =.0 ft CFM = fpm =.0 ft CFM = 0 0 fpm =.0 ft CFM = hp 0 7 hp hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp hp hp 7 -INCH NOZZLE %WOV = (CFM x 00) / ( x.9) 000 fpm =.0 ft CFM = 0 00 fpm =.0 ft CFM = 7 0 fpm = 7.0 ft CFM = 80 -INCH NOZZLE %WOV = (CFM x 00) / ( x.7) 000 fpm =.0 ft CFM = fpm =.0 ft CFM = 0 0 fpm = 8.0 ft CFM = hp hp hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp hp hp 7 transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Plume rise calculated assuming a 0 mph crosswind.,000 ft/min. is the minimum recommended outlet velocity per ANSI Z9..

15 Vektor-H Size -INCH NOZZLE %WOV = (CFM x 00) / ( x.0) 000 fpm =.0 ft CFM = fpm = 7.0 ft CFM = fpm = 9.0 ft CFM = 7-INCH NOZZLE %WOV = (CFM x 00) / ( x.9) 000 fpm =.0 ft CFM = fpm = 8.0 ft CFM = 0 0 fpm = 0.0 ft CFM = hp hp hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp hp hp 7 8-INCH NOZZLE %WOV = (CFM x 00) / ( x.8) 000 fpm =.0 ft CFM = 0 00 fpm = 9.0 ft CFM = 9 0 fpm =.0 ft CFM = INCH NOZZLE %WOV = (CFM x 00) / ( x.) 000 fpm = 7.0 ft CFM = fpm = 0.0 ft CFM = 89 0 fpm =.0 ft CFM = hp hp hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp hp hp 7 0-INCH NOZZLE %WOV = (CFM x 00) / ( x.7) 000 fpm = 8.0 ft CFM = 0 00 fpm =.0 ft CFM = 70 0 fpm =.0 ft CFM = 870 -INCH NOZZLE %WOV = (CFM x 00) / ( x.88) 000 fpm = 0.0 ft CFM = fpm =.0 ft CFM = 90 0 fpm =.0 ft CFM = hp 0 hp hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp 0 hp hp hp 7 transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Plume rise calculated assuming a 0 mph crosswind.,000 ft/min. is the minimum recommended outlet velocity per ANSI Z9..

16 Vektor-H Size -INCH NOZZLE %WOV = (CFM x 00) / ( x.) 000 fpm =.0 ft CFM = fpm =.0 ft CFM = 0 0 fpm =.0 ft CFM = 80 -INCH NOZZLE %WOV = (CFM x 00) / ( x.79) 000 fpm =.0 ft CFM = 0 00 fpm =.0 ft CFM = 7 0 fpm = 7.0 ft CFM = hp 7 00 hp hp hp 7 0 hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp 7 00 hp hp hp 7 0 hp hp -INCH NOZZLE %WOV = (CFM x 00) / ( x.) 000 fpm =.0 ft CFM = fpm =.0 ft CFM = 0 0 fpm = 8.0 ft CFM = 90 -INCH NOZZLE %WOV = (CFM x 00) / ( x.9) 000 fpm =.0 ft CFM = fpm = 7.0 ft CFM = fpm = 9.0 ft CFM = hp 7 hp 00 hp hp 7 0 hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp 00 hp hp hp 7 0 hp hp 7-INCH NOZZLE %WOV = (CFM x 00) / ( x 7.8) 000 fpm =.0 ft CFM = fpm = 8.0 ft CFM = 0 0 fpm = 0.0 ft CFM = 0 8-INCH NOZZLE %WOV = (CFM x 00) / ( x 8.07) 000 fpm =.0 ft CFM = 0 00 fpm = 9.0 ft CFM = 9 0 fpm =.0 ft CFM = hp 7 00 hp hp hp 7 0 hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp 7 hp 00 hp hp 7 0 hp hp transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Plume rise calculated assuming a 0 mph crosswind.,000 ft/min. is the minimum recommended outlet velocity per ANSI Z9..

17 Vektor-H Size 9-INCH NOZZLE %WOV = (CFM x 00) / ( x 8.) 000 fpm = 7.0 ft CFM = fpm = 0.0 ft CFM = 89 0 fpm =.0 ft CFM = INCH NOZZLE %WOV = (CFM x 00) / ( x 8.77) 000 fpm = 8.0 ft CFM = 0 00 fpm =.0 ft CFM = 70 0 fpm =.0 ft CFM = hp 00 hp hp hp 7 0 hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) 00 MA 0 7 X RESISTANCE CURVE 9 00 hp 7 hp 00 hp hp 7 0 hp hp -INCH NOZZLE %WOV = (CFM x 00) / ( x 9.9) 000 fpm = 0.0 ft CFM = fpm =.0 ft CFM = 90 0 fpm =.0 ft CFM = 00 -INCH NOZZLE %WOV = (CFM x 00) / ( x 9.) 000 fpm =.0 ft CFM = fpm =.0 ft CFM = fpm = 8.0 ft CFM = hp hp 00 hp hp 7 0 hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp 7 00 hp hp hp 7 0 hp hp -INCH NOZZLE %WOV = (CFM x 00) / ( x 9.8) 000 fpm =.0 ft CFM = fpm = 7.0 ft CFM = 9 0 fpm =.0 ft CFM = 70 Vektor-H System Approach Component Approach Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp hp hp 7 0 hp hp Field fabricated duct Leaky duct seams transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Plume rise calculated assuming a 0 mph crosswind.,000 ft/min. is the minimum recommended outlet velocity per ANSI Z9.. 7

18 Vektor-H Size 0 -INCH NOZZLE %WOV = (CFM x 00) / ( x 7.) 000 fpm =.0 ft CFM = fpm =.0 ft CFM = 0 0 fpm = 8.0 ft CFM = 90 -INCH NOZZLE %WOV = (CFM x 00) / ( x 8.) 000 fpm =.0 ft CFM = fpm = 7.0 ft CFM = fpm = 9.0 ft CFM = hp hp hp hp 7 0 hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp 00 hp hp 79 hp 7 0 hp hp 7-INCH NOZZLE %WOV = (CFM x 00) / ( x 9.) 000 fpm =.0 ft CFM = fpm = 8.0 ft CFM = 0 0 fpm = 0.0 ft CFM = 0 8-INCH NOZZLE %WOV = (CFM x 00) / ( x 0.0) 000 fpm =.0 ft CFM = 0 00 fpm = 9.0 ft CFM = 9 0 fpm =.0 ft CFM = hp 00 hp 79 hp hp 7 0 hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp 00 hp 79 hp hp 7 0 hp hp 9-INCH NOZZLE %WOV = (CFM x 00) / ( x 0.) 000 fpm = 7.0 ft CFM = fpm = 0.0 ft CFM = 89 0 fpm =.0 ft CFM = INCH NOZZLE %WOV = (CFM x 00) / ( x.) 000 fpm = 8.0 ft CFM = 0 00 fpm =.0 ft CFM = 70 0 fpm =.0 ft CFM = hp 00 hp hp hp 7 0 hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp hp hp 7 0 hp hp 8 transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Plume rise calculated assuming a 0 mph crosswind.,000 ft/min. is the minimum recommended outlet velocity per ANSI Z9..

19 Vektor-H Size 0 -INCH NOZZLE %WOV = (CFM x 00) / ( x.) 000 fpm = 0.0 ft CFM = fpm =.0 ft CFM = 90 0 fpm =.0 ft CFM = 00 -INCH NOZZLE %WOV = (CFM x 00) / ( x.9) 000 fpm =.0 ft CFM = fpm =.0 ft CFM = fpm = 8.0 ft CFM = hp hp hp hp 7 0 hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp 00 hp hp hp 7 0 hp hp -INCH NOZZLE %WOV = (CFM x 00) / ( x.07) 000 fpm =.0 ft CFM = fpm = 7.0 ft CFM = 9 0 fpm =.0 ft CFM = 70 7-INCH NOZZLE %WOV = (CFM x 00) / ( x.) 000 fpm =.0 ft CFM = fpm = 8.0 ft CFM = 90 0 fpm =.0 ft CFM = hp hp 79 hp hp 7 0 hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp 79 hp hp 7 0 hp hp 8-INCH NOZZLE %WOV = (CFM x 00) / ( x.9) 000 fpm =.0 ft CFM = fpm = 9.0 ft CFM = fpm =.0 ft CFM = 70 0-INCH NOZZLE %WOV = (CFM x 00) / ( x.70) 000 fpm = 7.0 ft CFM = fpm =.0 ft CFM = 78 0 fpm =.0 ft CFM = hp 00 hp 79 hp hp 7 0 hp hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp 79 hp hp 7 0 hp hp transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Plume rise calculated assuming a 0 mph crosswind.,000 ft/min. is the minimum recommended outlet velocity per ANSI Z9.. 9

20 Vektor-H Size 8-INCH NOZZLE %WOV = (CFM x 00) / ( x.9) 000 fpm =.0 ft CFM = 0 00 fpm = 9.0 ft CFM = 9 0 fpm =.0 ft CFM = INCH NOZZLE %WOV = (CFM x 00) / ( x.0) 000 fpm = 7.0 ft CFM = fpm = 0.0 ft CFM = 89 0 fpm =.0 ft CFM = hp hp 87 hp 90 0 hp 7 0 hp hp 0 hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp 7 hp 87 hp 90 hp hp hp 0 hp 0-INCH NOZZLE %WOV = (CFM x 00) / ( x.) 000 fpm = 8.0 ft CFM = 0 00 fpm =.0 ft CFM = 70 0 fpm =.0 ft CFM = 870 -INCH NOZZLE %WOV = (CFM x 00) / ( x 7.89) 000 fpm = 0.0 ft CFM = fpm =.0 ft CFM = 90 0 fpm =.0 ft CFM = hp hp 87 hp 90 hp hp hp 0 hp Volume (cfm x ) Volume (cfm x ) Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp hp 0 hp 7 0 hp hp 0 hp -INCH NOZZLE %WOV = (CFM x 00) / ( x 9.79) 000 fpm =.0 ft CFM = fpm =.0 ft CFM = fpm = 8.0 ft CFM = 0 -INCH NOZZLE %WOV = (CFM x 00) / ( x.) 000 fpm =.0 ft CFM = fpm = 7.0 ft CFM = 9 0 fpm =.0 ft CFM = hp hp hp hp 7 0 hp hp 0 hp Volume (cfm x ) Volume (cfm x ) 0 0 Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp 90 hp hp 7 0 hp hp 0 hp 0 transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Plume rise calculated assuming a 0 mph crosswind.,000 ft/min. is the minimum recommended outlet velocity per ANSI Z9..

21 Vektor-H Size 7-INCH NOZZLE %WOV = (CFM x 00) / ( x.98) 000 fpm =.0 ft CFM = fpm = 8.0 ft CFM = 90 0 fpm =.0 ft CFM = 90 8-INCH NOZZLE %WOV = (CFM x 00) / ( x.) 000 fpm =.0 ft CFM = fpm = 9.0 ft CFM = fpm =.0 ft CFM = hp 87 hp 90 hp hp 7 0 hp hp 0 hp Volume (cfm x ) Volume (cfm x ) 0 0 Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp 87 hp 90 hp 7 0 hp hp 0 hp 0-INCH NOZZLE %WOV = (CFM x 00) / ( x.79) 000 fpm = 7.0 ft CFM = fpm =.0 ft CFM = 78 0 fpm =.0 ft CFM = 90 -INCH NOZZLE %WOV = (CFM x 00) / ( x.7) 000 fpm =.0 ft CFM = 0 00 fpm = 7.0 ft CFM = 7 0 fpm =.0 ft CFM = hp hp 87 hp 90 hp 7 0 hp hp 0 hp Volume (cfm x ) Volume (cfm x ) 0 0 Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp 87 hp 90 hp 7 0 hp hp 0 hp -INCH NOZZLE %WOV = (CFM x 00) / ( x.) 000 fpm = 0.0 ft CFM = fpm =.0 ft CFM = 08 0 fpm = 0.0 ft CFM = 0 -INCH NOZZLE %WOV = (CFM x 00) / ( x.7) 000 fpm =.0 ft CFM = 0 00 fpm = 7.0 ft CFM = 7 0 fpm =.0 ft CFM = hp 7 hp 87 hp 90 hp 7 0 hp Volume (cfm x ) hp 0 hp Density 0.07 lb/ft Volume (m /hr x ) Density 0.07 lb/ft Volume (m /hr x ) hp hp 87 hp 90 hp 7 0 hp Volume (cfm x ) hp 0 hp transmission losses. Performance ratings do not include the effects of appurtenances (accessories). Plume rise calculated assuming a 0 mph crosswind.,000 ft/min. is the minimum recommended outlet velocity per ANSI Z9..

22 Sound Performance Data Once a Vektor -H unit has been selected that meets performance specifications, use the following procedure to attain sound data for the specific fan and % WOV. Interpolation will be used to determine the eight sound power levels and decibel rating. The Vektor-H Size 8, -inch nozzle is operating at 0 rpm and 7% WOV. Viewing the Size 8 Sound Power Table, interpolation between 0 and 80% WOV is needed to find values for 7% WOV. Also note that interpolation between 0 and 70 rpm will be used to find sound power at 0 rpm. Finally, an interpolation using nozzle outlet area will be performed to provide final sound power using the Nozzle Outlet Area Chart provided on page. Example Example Vektor-H Size 8 Inlet Sound Power by Octave Band Nozzle Size 9 in. Nozzle 9 in. Nozzle %WOV 7 8 L wa dba 7 8 L wa dba EXAMPLE: Calculations for a Vektor-H Size 8 First, interpolate the 9-inch nozzle data at 0 rpm between 80% and 0% WOV to find 7% WOV: =[ 0 rpm at 7% WOV, dba 7 db -{( 80% - 7% ) }] X(7 db - 9 db) = 7.8 dba 80% - 0% Perform a similar interpolation with data at 70 rpm to find the db level for 7% WOV: 70 rpm at 7% WOV, dba =[ 7 db - {( 80% - 7% ) }] X(7 db - 7 db) = 7.9 dba 80% - 0% Interpolate between the 0 and 70 rpm values at 7% WOV by replacing the percent WOV in the equation with the values and use the calculated db from the 7% WOV steps. =[ 0 rpm at 7% WOV, dba 7.9 db -{( 70-0 ) }] X (7.9 db db) = 7. dba 70-0 Perform the same interpolation procedures for the 9-inch nozzle which provides the dba for 7% WOV at 0 rpm (= 8. dba). Using the values calculated for 7% WOV at 0 rpm, interpolation by nozzle outlet area should be used between small and large nozzles to find the sound power of the -inch nozzle. -inch nozzle 0 rpm at 7% WOV, dba =[ 7. db - {(.97 in in ) X (7. db - 8. = 9.7 dba.97 in db)}] - 0. in AMCA Licensed Ratings Sound tests of Vektor-H Laboratory Exhaust Systems were conducted in Greenheck s AMCA Accredited Laboratory in accordance with AMCA Standard 00. Inlet sound ratings comply with AMCA Publication, qualifying these models to bear the AMCA seal for sound and air performance. The sound power levels published here can be compared directly with those of other similarly rated fans, or used as a baseline to determine sound levels in occupied spaces. Test Methods The sound data in this brochure is the result of extensive testing, which included inlet sound tests on Vektor-H Laboratory Exhaust Systems. AMCA Standard 00 clearly defines methods used to test fans in a reverberant sound test room. The reverberant room is specifically designed to allow sound waves to be dispersed evenly throughout the room. The walls have a hard surface that reflects sound and are positioned to prevent resonances which could result in quiet areas within the room.

23 Vektor-H Size 9 Inlet Sound Power by Octave Band Nozzle Size in. Nozzle 9 in. Nozzle %WOV 7 8 L wi A dba 7 8 L wi A dba Vektor-H Size 0 Inlet Sound Power by Octave Band Nozzle Size in. Nozzle 0 in. Nozzle %WOV 7 8 L wi A dba 7 8 L wi A dba Values shown are for inlet LwiA sound power levels for Installation Type A: Free inlet, Free outlet. The sound power level ratings shown are in decibels, referred to 0 - watts, calculated per AMCA Standard 0. The A-weighted sound ratings shown have been calculated per AMCA International Standard 0. The sound ratings shown are loudness values at a distance of ft. (. m) in a hemispherical free field calculated per AMCA International Standard 0. Values shown are for Installation Type A: free inlet hemispherical sone levels. dba levels are not licensed by AMCA International. The AMCA Certified Ratings Seal applies to LwiA values only.

24 Vektor-H Size Inlet Sound Power by Octave Band Nozzle Size in. Nozzle in. Nozzle %WOV 7 8 L wi A dba 7 8 L wi A dba Vektor-H Size Inlet Sound Power by Octave Band Nozzle Size 7 in. Nozzle in. Nozzle %WOV 7 8 L wi A dba 7 8 L wi A dba Values shown are for inlet LwiA sound power levels for Installation Type A: Free inlet, Free outlet. The sound power level ratings shown are in decibels, referred to 0 - watts, calculated per AMCA Standard 0. The A-weighted sound ratings shown have been calculated per AMCA International Standard 0. The sound ratings shown are loudness values at a distance of ft. (. m) in a hemispherical free field calculated per AMCA International Standard 0. Values shown are for Installation Type A: free inlet hemispherical sone levels. dba levels are not licensed by AMCA International. The AMCA Certified Ratings Seal applies to LwiA values only.

25 Vektor-H Size Inlet Sound Power by Octave Band Nozzle Size 8 in. Nozzle 8 in. Nozzle %WOV 7 8 L wi A dba 7 8 L wi A dba Vektor-H Size 8 Inlet Sound Power by Octave Band Nozzle Size 9 in. Nozzle 9 in. Nozzle %WOV 7 8 L wi A dba 7 8 L wi A dba Values shown are for inlet LwiA sound power levels for Installation Type A: Free inlet, Free outlet. The sound power level ratings shown are in decibels, referred to 0 - watts, calculated per AMCA Standard 0. The A-weighted sound ratings shown have been calculated per AMCA International Standard 0. The sound ratings shown are loudness values at a distance of ft. (. m) in a hemispherical free field calculated per AMCA International Standard 0. Values shown are for Installation Type A: free inlet hemispherical sone levels. dba levels are not licensed by AMCA International. The AMCA Certified Ratings Seal applies to LwiA values only.

26 Vektor-H Size Inlet Sound Power by Octave Band Nozzle Size 0 in. Nozzle in. Nozzle %WOV 7 8 L wi A dba 7 8 L wi A dba Vektor-H Size Inlet Sound Power by Octave Band Nozzle Size in. Nozzle 7 in. Nozzle %WOV 7 8 L wi A dba 7 8 L wi A dba Values shown are for inlet LwiA sound power levels for Installation Type A: Free inlet, Free outlet. The sound power level ratings shown are in decibels, referred to 0 - watts, calculated per AMCA Standard 0. The A-weighted sound ratings shown have been calculated per AMCA International Standard 0. The sound ratings shown are loudness values at a distance of ft. (. m) in a hemispherical free field calculated per AMCA International Standard 0. Values shown are for Installation Type A: free inlet hemispherical sone levels. dba levels are not licensed by AMCA International. The AMCA Certified Ratings Seal applies to LwiA values only.

27 Vektor-H Size 0 Inlet Sound Power by Octave Band Nozzle Size in. Nozzle 0 in. Nozzle %WOV 7 8 L wi A dba 7 8 L wi A dba Vektor-H Size Inlet Sound Power by Octave Band Nozzle Size 7 in. Nozzle 8 in. Nozzle %WOV 7 8 L wi A dba 7 8 L wi A dba Values shown are for inlet LwiA sound power levels for Installation Type A: Free inlet, Free outlet. The sound power level ratings shown are in decibels, referred to 0 - watts, calculated per AMCA Standard 0. The A-weighted sound ratings shown have been calculated per AMCA International Standard 0. The sound ratings shown are loudness values at a distance of ft. (. m) in a hemispherical free field calculated per AMCA International Standard 0. Values shown are for Installation Type A: free inlet hemispherical sone levels. dba levels are not licensed by AMCA International. The AMCA Certified Ratings Seal applies to LwiA values only. 7

28 Family of Lab Exhaust Systems High Plume - Effective means of creating a discharge plume height to prevent re-entrainment of chemical exhaust fumes into make-up air systems. Vektor-H High Plume Discharge Nozzle Centrifugal wheel Compact design / sealed airstream components Up to,000 cfm and in. wg Vektor-MH High Plume Nozzle Mixed flow wheel / bifurcated housing Compact design Up to 7,000 cfm and in. wg Vektor-CH High Plume Nozzle Centrifugal wheel Up to,000 cfm and in. wg High Plume Dilution - Fan design that entrains and mixes outside ambient air into the exhaust airstream prior to exiting out the windband discharge. Potentially hazardous exhaust or exhaust fumes is diluted and dispersed quickly. Vektor-MD High Plume Discharge Nozzle with Entrainment and Dilution Mixed flow wheel / bifurcated housing Compact design Up to 8,000 cfm and. in. wg Vektor-CD High Plume Discharge Nozzle with Entrainment and Dilution Centrifugal wheel Highest efficiency / easy service design Up to,000 cfm and. in. wg High Plume Variable Geometry Nozzle (VGN) - The discharge area automatically adjusts to maintain a constant discharge velocity and remain compliant to design codes. VGN maximizes effective plume heights during periods of reduced flow and lower discharge velocity fixed nozzles. Vektor-HS VGN discharge nozzle technology Variable volume flow constant velocity discharge Centrifugal wheel Up to,000 cfm and. in. wg Vektor-MS VGN discharge nozzle technology Variable volume flow constant velocity discharge Mixed flow wheel / bifurcated housing Up to,000 cfm and 0 in. wg Vektor-CS VGN discharge nozzle technology Variable volume flow constant velocity discharge Centrifugal wheel Up to,000 cfm and 0 in. wg Our Commitment As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications without notice. Specific Greenheck product warranties are located on greenheck.com within the product area tabs and in the Library under Warranties. Prepared to Support Green Building Efforts P.O. Box 0 Schofield, WI 7-00 Phone (7) 9-7 greenheck.com 00.LAB.NB00 R -07 Copyright 07 Greenheck Fan Corp.