Greenheck has expanded its line of non-actuated fire dampers. Now available in widths as great as 144 inches and heights up to 100 inches, Model DFDAF-310 represents a 20 percent dimensional increase over dampers previously available for a 1.5-hour fire damper with airfoil blade construction, according to the maker. The electronically actuated 1.5-hour fire resistance rated airfoil blade combination fire-smoke damper product line has also grown. Models FSD-311 and FSD-312 have increased available sizes in their product classes by 20 percent, now also offering widths as great as 144 inches and heights up to 100 inches.

Greenheck; (715) 359-6171; www.greenheck.com.