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Rectangular Smoke Dampers

UL 555S classified with leakage class I, II, or III

Smoke dampers can be closed and prevent the circulation of air and smoke through a duct or ventilation opening in a smoke barrier.

SESMD-201

SESMD-201

Class I leakage rating with 316 stainless steel construction, 3V blades; pressure up to 6 in. wg, velocity up to 2000 fpm; temperature up to 350°.

VIEW SESMD-201
https://catalog-api.greenheck.com/api/product/en-us/597
SMD-201

SMD-201

Class I leakage rating with 3V blades; pressure up to 6 in. wg; velocity up to 2000 fpm and temperature up to 350°.

VIEW SMD-201
https://catalog-api.greenheck.com/api/product/en-us/109
SMD-201M

SMD-201M

Modulating damper with Class I leakage rating with 3V blades; pressures up to 4 in. wg; velocity up to 2000 fpm and temperature up to 250°.

VIEW SMD-201M
https://catalog-api.greenheck.com/api/product/en-us/108
SMD-202

SMD-202

Class II leakage rating, 3V blades; pressure up to 6 in. wg; velocity up to 2000 fpm and temperature up to 350°.

VIEW SMD-202
https://catalog-api.greenheck.com/api/product/en-us/145
SMD-301

SMD-301

Class I leakage rating with airfoil blades; pressure up to 8 in. wg; velocity up to 4000 fpm and temperature up to 350°

VIEW SMD-301
https://catalog-api.greenheck.com/api/product/en-us/602
SMD-301M

SMD-301M

Modulating with airfoil blades and Class I leakage rating; pressure up to 4 in. wg; velocity up to 2000 fpm and temperature up to 250°.

VIEW SMD-301M
https://catalog-api.greenheck.com/api/product/en-us/591
SMD-301V

SMD-301V

Vertical airfoil blades and Class I leakage rating; pressure up to 4 in. wg; velocity up to 4000 fpm and temperature up to 350°.

VIEW SMD-301V
https://catalog-api.greenheck.com/api/product/en-us/590
SMD-302

SMD-302

Class II leakage rating with airfoil blades; pressure up to 8 in. wg; velocity up to 4000 fpm and temperature up to 350°.

VIEW SMD-302
https://catalog-api.greenheck.com/api/product/en-us/589
SMD-302M

SMD-302M

Modulating damper with airfoil blades and Class II leakage rating; pressure up to 4 in. wg; velocity up to 2000 fpm and temperature up to 250°.

VIEW SMD-302M
https://catalog-api.greenheck.com/api/product/en-us/587
SMD-401

SMD-401

Extruded aluminum blades with Class I leakage rating; pressure up to 6 in. wg; velocity up to 3000 fpm and temperature up to 250°.

VIEW SMD-401
https://catalog-api.greenheck.com/api/product/en-us/596
SMD-401EF

SMD-401EF

Extruded aluminum blades and frame with Class I leakage rating; pressure up to 6 in. wg; velocity up to 3000 fpm and temperature up to 250°.

VIEW SMD-401EF
https://catalog-api.greenheck.com/api/product/en-us/594
SMD-401M

SMD-401M

Modulating with extruded aluminum airfoil blades and Class I leakage rating; pressure up to 4 in. wg; velocity up to 2000 fpm and temperature up to 250°.

VIEW SMD-401M
https://catalog-api.greenheck.com/api/product/en-us/593
SSSMD-201

SSSMD-201

Class I leakage with 304 stainless steel construction, 3V blade; pressure up to 6 in. wg; velocity up to 2000 fpm and temperature up to 350°.

VIEW SSSMD-201
https://catalog-api.greenheck.com/api/product/en-us/592