Using a rigid trunk in your duct system will increase the efficiency of your HVAC system by reducing friction during air delivery.
Rigid Duct Trunk
About the Author: Luis Imery
Luis Imery is a one-of-kind builder and green rater whose work is honest, educational and inspirational. He carefully takes each homeowner in hand and step-by-step reveals all the great benefits that high performance construction offer — all within your budget.