PRODUCT COVERED
Quietflex - Flexible Air ducts (Model: QAS Flex, QASC Flex And QAS Acoustic flex) - UL 181.
PRODUCT DESCRIPTION
This report consists of flexible air ducts and air connectors sizes 4 through 18 in. The duct consists of a wire helix reinforced core, wrapped with a fiberglass insulation which in turn is covered with a reinforced vapor barrier.
MODELS
Flexible air ducts designated as "QAS Flex", "QASC Flex",and "QAS Acoustic flex".
MODEL SIMILARITY
QAS models are the same as QASC models except that the QASC model is a 7 foot length of the QAS model with a galvanized steel collar attached to each end.
RATINGS
| UL 181 |
Reaction to Fire Classification |
Class 1* |
FLAME SPREAD RATINGS
| Test Standard |
Flame Spread |
Smoke Development |
| UL723 |
25 or less |
50 or less |
*Class 1 – Air ducts and air connectors having a flame-spread index of not over 25 without evidence of continued progressive combustion and a smoke-developed index of not over 50.
LIMITATIONS
Residential:
Maximum rated positive pressure: 4 IN. WG
Maximum rated negative pressure: 1/2 IN. WG
Maximum rated velocity: 3000 FPM.
Commercial:
Maximum rated positive pressure: 4 IN. WG
Maximum rated negative pressure: 1/2 IN. WG
Maximum rated velocity: 3000 FPM
Note: A representative sample of the listed devices has been tested, investigated and found to comply with the requirements of the Standard(s) for UL 181:2013, "Standard for Factory Made Air Ducts & Connectors" and are identified with the ETL Listed Mark.
