Smoke pens offer HVAC technicians and remodelers a simple and affordable option for finding leaks in ductwork.

Leaky ductwork can contribute to significant energy loss in a building. Well-designed duct systems distribute air efficiently throughout a facility and keep rooms at a comfortable temperature.

CL Ward now offers a patent-pending sealed slip-and-drive system.

The institute says the certification is a way for HVAC sales technicians and HVAC ductwork fabrication workers to learn what is needed to offer several green HVAC services.