Manual D Ductsize (MDD) is a fast and simple program designed for sizing and analyzing HVAC duct systems based on the Air Conditioning Contractors of America’s (ACCA’s) Manual D procedures. It ...

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 ...

Developers and owners of residential homes are generally keen on keeping heating and cooling costs as streamlined as possible without sacrificing performance. A properly sized system costs less to run ...

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 ...