Greenheck Fan FSD-311V is a combination fire smoke damper that can be used for smoke control and fire safety in HVAC systems. It has a UL 555 fire resistance rating of 1½ hours and a UL555S leakage rating of Class I, meaning it can withstand high temperatures and prevent the spread of smoke and fire. The damper is made of galvanized steel with airfoil blades that ensure low resistance to airflow, even at high velocities (up to 4000 fpm) and pressures (up to 4 in. wg). It can be mounted vertically and is suitable for use in both supply and exhaust applications.
Greenheck Fan FSD-311V is a combination fire smoke damper that can be used for smoke control and fire safety in HVAC systems. It has a UL 555 fire resistance rating of 1½ hours and a UL555S leakage rating of Class I, meaning it can withstand high temperatures and prevent the spread of smoke and fire. The damper is made of galvanized steel with airfoil blades that ensure low resistance to airflow, even at high velocities (up to 4000 fpm) and pressures (up to 4 in. wg). It can be mounted vertically and is suitable for use in both supply and exhaust applications.
Greenheck Fan FSD-311V is a combination fire smoke damper that can be used for smoke control and fire safety in HVAC systems. It has a UL 555 fire resistance rating of 1½ hours and a UL555S leakage rating of Class I, meaning it can withstand high temperatures and prevent the spread of smoke and fire. The damper is made of galvanized steel with airfoil blades that ensure low resistance to airflow, even at high velocities (up to 4000 fpm) and pressures (up to 4 in. wg). It can be mounted vertically and is suitable for use in both supply and exhaust applications.
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