Mechanical Supplies
HVAC Air Distribution SystemSpiral duct system
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.
SMACNA HVAC Duct Construction Standards
The North American reference for how ductwork is built: gauge, reinforcement and sealing against pressure class. What a duct submittal is checked against.
UL 181
Factory-made air ducts and air connectors: the listing a flexible or fabricated duct carries.
NFPA 90A
Installation requirements for air conditioning and ventilating systems, including where fire and smoke dampers are required.