Norm Grusnick

Turning vanes in HVAC ductwork are perhaps one of the greatest sources of conflict between sheet metal contractors and HVAC engineers. Why? Because many mechanical/sheet metal contractors believe turning vanes can cause the ductwork to […]

To ensure the proper fan performance as catalogued, caution must be exercised in fan placement and connection to the ventilation system. Obstructions, transitions, poorly designed elbows, improperly selected dampers, etc., can cause reduced performance, excessive […]

The acoustical environment created by an HVAC system may or may not be a critical issue for the tenant or building owner, but understanding the sound data published by manufacturers is necessary to make an […]

After louvers are installed, start up of the air system may reveal louver issues that require attention. Stationary-blade louvers have no moving parts. Therefore, they generally present few problems during operation. Operable louvers have a […]

In many cases, installation is just as important to louver function as is design. Specifying the correct frame style and options can substantially improve installation. In many cases, louver manufacturers have specific models and accessories […]