Dayton 3C437


Roof Curb, Adjustable Width

3C437 38857
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ItemRoof Curb
TypeAdjustable, Nonventilated
Curb Height (In.)12-3/8
Curb Square O.D. (In.)23-1/2 to 32
Curb Square I.D. (In.)19-1/2 to 28
Damper Size (In.)19 to 27 Sq.
Flashing Flange (In.)1-1/8
Mounting Flange Surface W (In.)1 1/8
Construction18 Gauge Galvanized Steel
Use w/Dayton VentilatorsHaving a Square Base From 25 to 30-1/2"
For Use With UL 705 Applications
Includes Damper Tray
Weight 61.000000


Roof Curb, Adjustable Width, Nonventilated, Outside Square 23 1/2 to 32 In, Curb Height 12 3/8 In, 18 Gauge Galvanized Steel Construction, For General Ventilation, Use With Dayton Ventilators Having a Square Base From 25 to 30 1/2 Inches

Nonventilated Roof Curbs
  • Canted
  • For flat, noninsulated roof decks with thick or rigid roofing material. 18-ga. galvanized steel body construction with fully welded corners. Fixed curbs include 1-1/2" wood nailer.
  • Prefabricated, leakproof curbs provide compatibility between ventilator, curb, and roof opening on commercial and industrial buildings. Most include 1" insulation and integral damper tray. Adjustable curbs are shipped unassembled. For recommended dampers, see page 4456.
  • For noninsulated metal, concrete, or wood roof decks For built-up asphalt or coal tar roofing materials

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