“HVAC Control Damper” is a 16-page brochure that presents the manufacturer’s extensive line of HVAC control and manual balancing dampers. Line drawings and photos illustrate the products featured.

Greenheck has introduced a round industrial control HVAC damper to accommodate higher velocities and pressure. Model HCDR-450 is rated for velocities up to 7000 fpm and pressure up to 30 in. wg, and ...