• Your shopping cart is empty!

  • BS 4979-2:1974

BS 4979-2:1974

Methods for testing and rating air control devices for air distribution systems-Aerodynamic testing of variable flow rate assemblies without a heat exchanger

BSI Group, 07/22/1974

Publisher: BS

File Format: PDF

$125.00$251.46


Published:22/07/1974

Note:This product is unavailable in Ukraine, Russia, Belarus

Deals with the testing of the variable flow rate control characteristics (using a simulated external signal) and casing and damper leakage, as well as (in the case of dual duct variable flow rate boxes) the efficiency of mixing following the transition from variable flow rate, and the flow proportioning damper.

All current amendments available at time of purchase are included with the purchase of this document.

More BS standard pdf

BS PD CEN/TS 17701-2:2022

BS PD CEN/TS 17701-2:2022

Plant biostimulants. Determination of specific elements-Part 2. Determination of total content of Cd, Pb, Ni, As, Cr, Cu and Zn

$90.00 $180.34

BS BSI Flex 390 v1.0:2022-06

BS BSI Flex 390 v1.0:2022-06

Built environment. Value-based decision making. Specification

$104.00 $209.80

BS PD CEN/TS 17779:2022

BS PD CEN/TS 17779:2022

Organo-mineral fertilizers - Extraction of phosphorus, which is soluble in neutral ammonium citrate

$76.00 $152.40

BS 22/30373478DC

BS 22/30373478DC

BS EN ISO 13997. Protective clothing. Mechanical properties. Determination of resistance to cutting by sharp objects

$12.00 $25.40