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TAMCO Install Types

Install Types for UL/ULC approved smoke dampers.

Square-to-Round
transition

Smoke damper with square to round transition

MINIMUM DUCT DIAMETER:
9” (229 mm)


MAXIMUM DUCT DIAMETER:
58” (1474 mm)


MAXIMUM SECTION SIZE:
25 ft² (2.3 m²)


MAXIMUM FINISHED OD:
62”w x 62”h (1575 mm x 1575 mm)

  • Transition pieces are a minimum of 18 ga. galvanized steel for Series 1000 SM.
  • Transition pieces are stainless steel for Series 1000 SM with SW Option.
  • Transition pieces and damper are sealed together.
  • Dampers are built 4" (102 mm) larger than specified duct diameter. (Dampers are fabricated square.)
  • Finished transition diameter is ¼" (6.35 mm) less than specified duct diameter, providing clearance for mating duct which slides over round transition. This ensures free movement of damper blades.
  • For duct diameter sizes less than 9”, contact TAMCO Customer Service.
  • Actuators can only be mounted externally when smoke dampers are ordered as square to round install type.
  • Multi-section dampers assemblies can only be connected using jumpers when smoke dampers are ordered as square to round install type. Jack shafts are not available for this install type.
  • Always provide duct diameter dimension when ordering.

TAMCO UL/ULC Approved Smoke Damper Installation Guidelines