Tag: HVAC design

  • Using Total Effective Length in Duct Design

    Prime:  prime Subtitle:  For air flow purposes, a duct system is often much longer than it appears Images:  Today I’m going to explain an important concept in one of the most popular ways of doing duct design. I’ve been writing a series on duct design over at my blog and began with a look at…

  • Using Total Effective Length in Duct Design

    Prime:  prime Subtitle:  For air flow purposes, a duct system is often much longer than it appears Images:  Today I’m going to explain an important concept in one of the most popular ways of doing duct design. I’ve been writing a series on duct design over at my blog and began with a look at…

  • How to Move Air Quietly Through a Duct System

    Prime:  prime Subtitle:  David Hill shared the secrets of good air flow at the 2015 Building Science Summer Camp Images:  At my first Building Science Summer Camp in 2011, David Hill gave a great presentation on some of the big problems with duct systems. (In case you weren’t reading this blog back then, I got…

  • A 3-Ton Air Conditioner Will Rarely Give You 3 Tons of Cooling

    Subtitle:  Even when a cooling system is perfectly designed and installed, three factors can reduce an air conditioner’s capacity Images:  Of course, there are more than three reasons that your 3-ton air conditioner isn’t really 3 tons, starting with the fact that it’s not 3 tons in weight. That unit refers to cooling capacity and…