Q: Tim, I've got a forced-air furnace. Several rooms in my house are cold in the winter and are hot and stuffy in the summer when the AC is on. Most of the rooms are comfortable. Why do you think this ...

Before selecting duct materials, it helps to understand how air flows from your heating/cooling unit through the duct network. Most systems use either a hot air furnace or an air conditioner ...

GET IT RIGHT: Duct fitting construction has a large influence on its equivalent length and which air duct calculator setting you choose. The fitting on the left has a much higher equivalent length due ...

Our team designed, built, and tested a fan/duct assembly (Figures 1 and 2), to investigate general airflow properties, only to inadvertently discover that HVAC ducts ...

Compare plans tailored to your home & budget. According to the U.S. Department of Energy, a leaky air duct can cost hundreds of dollars in heating and cooling bills. If simple repairs don’t fix the ...