Deals with constant flow rate controller characteristics, the performance of the proportioning damper fitted to a dual duct box and the degree of temperature mixing achieved by this latter, as well as with casing leakage. Both single and dual boxes are covered, also single duct units.
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BS 4979-1:1973
Original price was: $264.16.$132.00Current price is: $132.00.
Methods for testing and rating air control devices for air distribution systems-Aerodynamic testing of constant flow rate assemblies without a heat exchanger
BSI Group , 08/29/1975
