Greenheck Vektor-H Laboratory Exhaust System Offers Cost Savings and Significant Engineering Benefits
Traditionally, many laboratory exhaust fan systems consist of field fabricated, or field "built-up" systems utilizing scroll type centrifugal fans and field fabricated components. These systems require extensive pre-engineering by the consulting specifying engineer or design-build contractor to ensure all integrated components meet laboratory design standards, including the pressure losses of field fabricated components in the fan selections. Additionally, field fabrication and installation of parts and pieces add to the installed cost of
The Greenheck Vektor-H provides a system approach with the following benefits:
Benefit 1: Lower first installed cost - The installed cost of the Vektor-H is significantly less than the field fabricated "built-up" system, and is illustrated to the right.
In this example, the Vektor-H system approach results in approximately a 25% reduction in installed cost, and allows the contractor to complete the project more efficiently and move on to other projects. Extra installed costs are incurred in a builtup system by the additional labor of field fabricating and then installing the parts and pieces to assemble the exhaust system.
Design engineers benefit from the Vektor-H system because it is predesigned and engineered, streamlining their design process. Most importantly, the end user receives a system that will perform as specified and provide
|Item||Vektor H-22 "System"||SWSI Size 22 "Built-up"|
|Guy Wire and Hardware||$75|
|12" Stainless Spiral Stack (6')||$1,150|
|12" to 10" Transition||$285|
|Square to Round Inlet Transition||$1,570|
|23" Stainless 90 Degree Elbow||$3,070|
|23" Stainless Spiral Inlet (6')||$2,430|
|Field Labor (Mechanical @ $100/hr)||$1,040||$2,600|
|Field Labor (Roofing @ $50/hr)||$100||$250|
|Total Labor Hours||12.4||31|
Benefit 2: Certified performance for the "system" - Greenheck's Vektor-H system is tested as an assembly in accordance with AMCA 210 and 300, has AMCA certified sound and air performance, and licensed to bear the AMCA seal for sound and air. AMCA is the independent third-party industry recognized authority on fan performance testing. AMCA certified ratings assures that equipment will perform as cataloged by the manufacturer.
The assembled components of the "built-up" system should be analyzed for the resultant noise that will be generated as to not negatively impact the acoustic requirements of a project. Stacks with high velocity cones (nozzles) further complicate the acoustic performance and fan performance calculations.
Benefit 3: Single source responsibility - Factory engineered and manufactured by Greenheck.
Benefit 4: Free standing design - The Vektor-H is designed to withstand a 125 mph wind loading without the use of guy wires or tie down points.
Benefit 5: Single roof penetration point - With the Vektor-H system, only a single roof penetration for the roof curb is required, minimizing the possibility of roof leaks. Other field build-up systems will require roof penetration for the ductwork, but also tie-down points as well as other elements which must be installed on the roof decking increasing
Benefit 6: Exhaust system integrity and reliability - No possibility of duct leakage, no field fabricated and sealed duct connections. Blower bearings are air handling quality concentric mount L10 100,000 hour minimum; fan construction is AMCA spark resistant Class "B". Dual-groove belt
Benefit 7: Corrosion resistant throughout - Entire system is coated with LabCoat™ zinc rich epoxy primer and Hi-Pro polyester resin finish,
Benefit 8: Applicable to constant volume or variable volume exhaust - Variable volume application is achieved using the Vektor-H optional bypass air
Benefit 9: Application flexibility - Can be applied to manifolded fume hood systems with up to three Vektor-H blowers on a common plenum
Benefit 10: The Greenheck Vektor-H laboratory exhaust system can be applied to installations with vertical exhaust risers as well as those requiring roof mounted horizontal inlet collection ducts.