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Square aluminium backdraft damper, galvanised steel frame, 9.75 in wide, 4.5 in deep

Dayton

Dayton 2FTW8 Backdraft Damper 9.75 In Square 4.5 In Deep

SKU CH-EVV9-DW03V

Square backdraft damper for 10-inch duct, aluminium panel in galvanised steel frame, 2000 fpm max velocity

  • Product typeNo Flange, Horizontal or Vertical Mount
  • Fits 10 in square ducts for straightforward installation
  • Opens vertically or horizontally to suit layout needs
  • 2000 fpm max velocity handles strong airflow
  • .4 sq ft free area reduces resistance
  • 20 ga galvanised steel frame resists corrosion

Dayton 2FTW8 Backdraft Damper

The Dayton 2FTW8 is a square backdraft damper designed for horizontal or vertical mounting in ductwork. It fits a nominal 10 in duct diameter and a 10 in square rough opening. The unit uses a single aluminium panel that opens with airflow and closes by gravity to prevent reverse flow.

Thermals noise and power draw

The galvanised steel frame is 20 ga thick with a 2 in frame depth and an overall length of 4.5 in. It is rated for a maximum air velocity of 2000 fpm and a maximum pressure of 1 in wc. The free area measures .4 sq ft, allowing air to pass with minimal resistance during normal operation.

Mounting orientation and duct fit

This damper installs in either horizontal or vertical orientations without a flange. It is built specifically for a 9.75 in square overall height and width to match a 10 in square duct opening. Builders needing a flanged frame or a different duct shape should select another model.

How it compares

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

Price $28.99
Pricier than about 61% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameDAYTON
Product typeNo Flange, Horizontal or Vertical Mount

Questions about this item

How do I mount this backdraft damper in a horizontal duct run?

The damper accepts horizontal or vertical mounting with no flange; secure the galvanized-steel frame into a 10 in square rough opening and ensure the single panel swings freely in the airflow direction.

What maintenance will the aluminium panel and galvanized frame need over time?

Periodically wipe dust from the aluminium panel and check that the 20 ga galvanized-steel frame shows no corrosion; the panel pivots on a simple hinge that requires no lubrication.

At what airflow speed does the damper reach its rated pressure limit?

The maximum air velocity is 2000 fpm and the maximum pressure is 1 in wc; sustained flow beyond either value can prevent the panel from closing fully.

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