We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Square galvanized steel fire/smoke damper, 12 inch width, rectangular frame, single blade panel

Dayton

Dayton 3HGK2 Square Fire/Smoke Damper 12 in W

SKU CH-SPW6-1GMDT

Galvanised-steel square fire and smoke damper rated for 2000 fpm airflow and 4 in wg pressure, 120 V AC operation

  • Product typeClass II Leakage
  • Galvanized steel frame resists corrosion for long service life
  • Class II leakage rating limits air loss through closed damper
  • Dynamic design handles airflow up to 2000 fpm in operating systems
  • 120 V AC actuator enables powered fire and smoke control
  • Square 12 in width fits standard duct rough openings

Dayton 3HGK2 Fire/Smoke Damper

The Dayton 3HGK2 is a square fire and smoke damper built for HVAC ductwork that requires a Class II leakage rating. It is intended for installers and facility managers who need a dynamic damper that closes against moving air in fire and smoke scenarios. Galvanized steel construction suits commercial and industrial installations where code-compliant life-safety hardware is specified.

12 in square rough opening

The damper fits a 12 in by 12 in square rough opening with an overall frame of 11.75 in height, 16 in length and 12 in width. A single-panel blade design operates at up to 2000 fpm and 4 in wg static pressure, driven by a 120V AC actuator. These dimensions and performance limits determine whether the unit matches the duct layout and system pressure class on the project.

Galvanized steel frame and blade

The 16 ga galvanized steel frame and blade resist corrosion in typical indoor duct environments without additional coatings. No fusible link, position switches or mounting hardware are included, so the specifier must source those separately to complete a code-compliant installation. The bare-metal finish also means field painting is possible if the project requires colour coding.

How it compares

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

Price $483.99
Pricier than about 92% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameDAYTON
Product typeClass II Leakage

Questions about this item

How does the 2000 fpm maximum air velocity affect performance in a real duct system?

The damper is rated for airflow up to 2000 feet per minute, so it will maintain its fire and smoke seal at typical commercial duct velocities without exceeding its tested limit.

What does the 4 in wg maximum air pressure rating cap in practice?

It limits the static pressure the damper can withstand while staying closed during a fire event; systems operating above 4 inches water gauge would need a higher-rated assembly.

Will the 12 inch width and 16 inch length fit a standard square rough opening?

The unit requires a square rough opening of 12 inches wide; its overall dimensions are 12 inches wide by 16 inches long by 11.75 inches high, so the opening must match the 12-inch width exactly.

More in General Hardware & Accessories

Similar items