PRODUCT COVERED
VL Engineering - Flexible Air ducts And Air Connectors (Brand: D-Flex) - UL 181
PRODUCT DESCRIPTION
The air ducts consist of a spirally wound wire, encapsulated in a core liner material, covered with fiberglass blanket material and an exterior vapor barrier material.
The air connectors are mild steel with the same diameter identical to the cores used for the air ducts.
MODELS
D-20124, D-20125, D-20126, D-20127, D-20128, D-201210, D-201212, D-201214, D-201216, D-201218, D-201220.
RATINGS
| UL 181:2013 |
Reaction to Fire Classification |
Class 1* |
FLAME SPREAD RATINGS
| Test Standard |
Flame Spread |
Smoke Development |
| UL 723 |
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
Maximum rated positive pressure: 10 IN. WG
Maximum rated negative pressure: 1/2 IN. WG
Maximum rated velocity: 4000 FPM.
Minimum Diameter: 4"
Maximum Diameter: 20"
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.
