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Square galvanized-steel backdraft damper with aluminium blades, 13 3/4 in frame, 4 1/2 in deep

Dayton

Dayton 2FTX5 Backdraft Damper 13 3/4 in Square

SKU CH-K2CZ-YZJTW

Square aluminium back-draft damper fits 14 in duct openings and mounts vertically or horizontally

  • Product typeNo Flange, Horizontal or Vertical Mount
  • Fits 12 in fan diameter for direct duct connection
  • Square 13 3/4 in frame matches 14 in rough opening
  • Aluminium panel with galvanised steel frame resists corrosion
  • Mounts horizontally or vertically without flange for flexible install
  • 2000 fpm max velocity handles high airflow demand

Backdraft Damper for 14 in Square Ducts

The Dayton 2FTX5 is a no-flange backdraft damper designed for 14 inch square duct openings. It suits installers who need gravity-operated airflow control in vertical or horizontal orientations. The single-panel aluminium blade opens with air pressure and closes when the fan stops, preventing reverse flow. This unit is not for buyers who need a flanged frame for direct duct connection.

Galvanised Steel Frame with Universal Mounting

The frame uses 20 gauge galvanised steel and measures 13.75 inches square overall with a 4.5 inch depth. Horizontal or vertical mounting is supported without additional brackets. The rough opening matches a 14 inch square cut-out, simplifying layout on site. The lack of flange means the damper sits inside the opening rather than overlapping it, which affects sealing method.

Low-Pressure Operation up to 2000 fpm

Maximum rated air velocity is 2000 fpm with a pressure drop of 1 inch water column. Free area is 1 square foot, so resistance stays low in typical exhaust or intake runs. Aluminium blade weight keeps opening force minimal, reducing flutter and noise at normal velocities. The damper is not suited for systems that exceed the stated velocity or pressure limits.

How it compares

Measured against everything we stock in General Hardware & Accessories, at today’s prices. Recalculated every night.

Price $31.99
Pricier than about 63% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameDAYTON
Product typeNo Flange, Horizontal or Vertical Mount

Questions about this item

What maximum air velocity does the 13.75 in square backdraft damper handle?

The damper is rated for a maximum air velocity of 2000 fpm, which caps the practical airflow speed through the 1 sq ft free area.

What rough opening dimensions are required to mount this square damper?

A 14 in square rough opening is needed; the frame measures 13.75 in overall height and width with a 2 in frame depth for vertical or horizontal mounting.

How is the damper installed and what step is often missed?

Mount the flangeless frame in the 14 in square opening, secure through the 20 ga galvanized steel frame, and ensure the single panel swings freely in the correct airflow direction.

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