Q. 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 is ...

It's been proven that a cold-air intake system adds power, but, if you're building a system for scratch, how large does it need to be? Years ago, I talked with old-time Mopar Super Stock racer John ...

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 ...

Syska Hennessy Group, the international engineering firm, has launched an app called the Ductulator, which helps architects, owners, contractors, and mechanical engineers easily determine and specify ...

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 ...

Big Easy AC Heating launched services for installing residential air ducts in August 2025, expanding its HVAC service portfolio to address growing demand for professional ductwork solutions. The ...