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 ...

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.

As limits on SO 2 emissions become tighter, many coal-fired utility power plants are adding new flue gas desulfurization (FGD) systems or upgrading existing ones. The majority of these systems employ ...

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.