Specify Aero Dyne H-E-P by Name, Indicating Cheap Alternatives are Unacceptable
Not all Turning Vanes are alike. Aero Dyne H-E-P Turning Vanes and Rail are laboratory tested and certified for performance. Did you know SMACNA excludes turning vane performance detail?
If performance matters to you, it is critical to include performance requirements in your specification. Aero Dyne H-E-P generated sound power levels do not exceed 54 decibels in band 4 at 2000 fpm.
Specifying by name is important. Simply referring to the industry sheet metal standard is risky. The standard manual gives little detail about turning vanes and does not include performance information.
Including performance requirements will encourage contractors to use Aero Dyne H-E-P versus fabricating turning vanes in their sheet metal shop.
Require independent performance test data for pressure loss and generated sound power levels when substitutions are proposed.
Without performance requirements, companies may attempt to fabricate vanes in their sheet metal shops. This will leave your project exposed to pressure problems and duct noise. Standard vane rail products often detach from their dimple or tab style supports and are likely to have multiple sharp edges for dust collection.
Aero Dyne H-E-P Turning Vane Suggested Specification
Cut/paste these specifications into the master specification (Section 233300 or 15890)
2.0 TURNING VANES
- Turning vanes shall be an engineered, true airfoil design with smoothly-rounded entry nose and extended trailing edge for high efficiency performance.
- Generated sound power level shall not exceed 54 decibels in band 4 at 2,000 FPM-duct 24 x 24.
- Acceptable Manufactures: Aero-Dyne Sound Control Company, High Efficiency Profile, H-E-P. Contact: www.aero-dyne.net PH: 800-522-2423
- Fabricate assemblies with the Aero-Dyne Side Rail support system. Install vanes on design centers of 2.4 inches across the full diagonal dimension of the elbow. Tabbed or slotted dimple fasteners are not acceptable.
- Submittals are required; proposed substitution shall include independent performance test data for pressure loss and generated sound power levels.