HVAC Air Distribution SystemSound attenuators
Standards this line is built to
The designations below are cited by the products on this page. A specification is written in these, not in product names, so each one is set out with what it governs. Progress Horizon Trading supplies this line as an authorized distributor across Saudi Arabia.
ASTM E477 (Intertek tested)
Acoustical and airflow performance of duct silencers, independently tested by Intertek. The method behind an attenuator's insertion loss and self-noise data.
AMCA 300
The reverberant room method for measuring the sound a fan emits. The source of the sound power figures used in an acoustic calculation.
UL 181
Factory-made air ducts and air connectors: the listing a flexible or fabricated duct carries.
ASTM E84
Surface burning characteristics: the flame spread index and smoke developed index a material is classified by. Class A is the usual requirement in an occupied building.
NFPA 90A
Installation requirements for air conditioning and ventilating systems, including where fire and smoke dampers are required.
EN ISO 7235
Measurement procedures for ducted silencers: insertion loss, flow noise and pressure drop. These are the three numbers an attenuator is selected on.
ASTM E90
The laboratory measurement of airborne sound transmission loss: the raw data a partition's acoustic rating is derived from.
ASTM E413 (STC)
Sound Transmission Class: the single number that summarises an ASTM E90 measurement, used to compare partitions and doors.