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Square galvanised steel frame with aluminium backdraft damper panel, 11 1/2 inch sides

Dayton

Dayton 3TZ50 Roof Mount Exhaust Damper 11 1/2 Sq

SKU CH-QM9M-8TDDM

Aluminium back-draft damper with galvanised steel frame, 11 1/2 in square, 4 1/2 in deep, rated to 2000 fpm

  • Product typeRoof Mount, Exhaust
  • Aluminium panels resist corrosion for long service life
  • Galvanised-steel frame adds rigidity in roof-mounted installations
  • 4 sq ft free area allows efficient exhaust airflow
  • 2 000 fpm maximum velocity handles high-volume ventilation needs
  • 10 in square rough opening fits standard duct openings

Dayton 3TZ50 Roof Exhaust Damper

The Dayton 3TZ50 is a roof-mounted backdraft damper designed for exhaust-only ventilation. Its square aluminium blades sit inside a galvanised steel frame and open automatically when the fan runs. The unit fits a 10-inch square rough opening and suits commercial or residential roof penetrations.

11.5-Inch Square Frame with 10-Inch Opening

The overall frame measures 11.5 inches by 11.5 inches while the required rough opening is a 10-inch square. This single-panel damper provides a free area of .4 square feet and handles air velocities up to 2000 fpm. Buyers who need a round duct connection or a larger free area cannot use this model.

Galvanised Steel Frame and Aluminium Blades

The 20-gauge galvanised steel frame resists corrosion in rooftop exposure. Aluminium blades operate by gravity and airflow pressure without motorised parts, so the damper adds no electrical load and runs silently. The 4.5-inch overall length and 2-inch frame depth keep the profile compact for standard roof curbs.

How it compares

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

Price $29.99
Pricier than about 61% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameDAYTON
Product typeRoof Mount, Exhaust

Questions about this item

What does the 2000 fpm maximum air velocity mean for airflow through this damper?

The 2000 fpm rating indicates the highest air speed the damper panels are designed to handle without excessive pressure drop or noise. At that velocity the 0.4 sq ft free area will pass the corresponding volume of air for a 10 in square duct.

How does the 10 in rough opening relate to the 11 1/2 in overall frame?

The 10 in square rough opening is the cutout size required in the roof curb or deck. The 11 1/2 in square frame overlaps that opening, providing a mounting flange for fastening and sealing.

What roof curb or opening does the 11 1/2 in square frame fit?

The damper fits a 10 in square rough opening. The frame measures 11 1/2 in square overall and is 2 in deep, so it mounts on a standard 10 in square curb with the flange overlapping the curb edges.

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