Atma Ram Kishan Chand

Fire Insulated Ducts



An insulated U.L. 181 Class 1 Air Duct, Constructed of a tough b Jack Inner – core, and surrounded by a thick blanket of flbreglass insulation. This is airtight; and is designed for HVAC system.

Max. Operating Temperature :

  • -29 Deg. To 60 Deg. C (@ max Pressure)
  • -29 Deg. To 60 Deg. C (@ 2” pos w.g. Pressure)
  • Standard Length : 25 Ft.
  • Standard Diameters : 4” – 20”


Code Compliance

Recommended Operating Pressure :

6” w.g. pos. / neg.

4” – 12” dia

4” w.g. pos. / neg.

4” – 20” dia

¾” w.g. pos. / neg.

All Dia

Rated positive pressure

10” w.g. per U.L. – 181

Maximum Velocity

5000 FM

R Value

402