Dr. Dave Pest is Vice president of operations for Lindab Inc., www.lindabusa.com, manufacturer of spiral duct systems. He also serves as president of the Spiral Duct Association. He can be reached at 757-488-1144
With energy costs going through the roof, HVAC system designers and specifiers are taking a much harder look at the many choices available in ductwork. One question that is being asked more and more is whether to choose rectangular or spiral duct.