PRODUCT COVERED
Royal Metal Products - Flexible Air Ducts And Air Connectors - Class 1 - 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
Air ducts: 901, 902, 903, 904 followed by up to two characters; followed by up to two characters.
Air Connectors: 907 followed by up to two characters.
MODEL SIMILARITY
X is 1 or 2 digits or letters indicating the R-value of the insulation provided.
YY is 1 or 2 digits or letters indicating the diameter of the duct.
ZZ is 1 or 2 digits or letters indicating the diameter of the connector
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: 3/4 IN. WG
Maximum rated velocity: 5500 FPM
Minimum size of duct: 4" Diameter
Maximum size of duct: 20" Diameter
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.
