MANY YEARS AGO, I paid good money out of my own pocket to learn how to design a duct system. I won’t say to whom I paid this money, because I got ripped off. What I “learned” was how to find .1 on a ...

The Sheet Metal and Air Conditioning Contractors’ National Association (SMACNA), the leader in promoting quality and excellence in the sheet metal and air ...

For the past 50 years, engineers have been “designing” duct systems. Quite often, they were not actually designing the systems, but were sizing duct the duct according to some rule of thumb. The rules ...

The shortest distance between two points is a straight line, but when it comes to your duct work that may not be the best path for an efficient system that cools and heats the home properly.

This chapter is adapted mainly from ASHRAE Fundamentals Handbook (2001). Air ducts deliver conditioned air from HVAC units to the space to be conditioned, and, depending on the design, may also bring ...

DuctPro Systems provides high performance air duct cleaning equipment built for both new startups and established HVAC professionals, offering a complete all in one system designed for power, ...

Your air ducts are one of the most important systems in your home, and if the ducts are poorly sealed or insulated they are likely contributing to higher energy bills. Your home's duct system is a ...

Performing electrical cable heating calculations can be a cumbersome task, but they’re essential to accurately determining the allowable ampacity of an underground electrical duct bank installation.