Tag Archives: Sun

Applets for Energy and Environmental Design

Green Building

Applets for Energy and Environmental Design

Originally published on July 10, 2017 by BNP Media through the Building Enclosure Blog. Newsflash: There are a lot of great (and free) online resources for design professionals. When I am having exchanges about energy and environmental design analysis with colleagues and students, it seems like I am constantly referring them to any number of small, accessible online utility programs for performing simple – yet highly sophisticated – functions. Some would refer to these small programs as applets. Below, I have….

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The Difference Between Reflectance and Emittance

Green Building

The Difference Between Reflectance and Emittance

Originally published on November 18, 2015 by BNP Media through the Architectural Roofing & Waterproofing Blog. What is emittance? Among the three basic forms of heat transfer – conduction, convection, and radiation – the term emittance refers to a material’s ability to release heat through radiation. The term necessarily refers to the heat exchange at surface of a material because heat exchange through a solid would be conductive and heat exchange through a fluid would be convective. Emittance is the….

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Understanding the Profile Angle

Green Building

Understanding the Profile Angle

Originally published on July 6, 2015 by BNP Media through the Walls & Ceilings Blog. If you’ve ever designed an overhang to protect a window, you have been confronted with the question of how far should it extend? It seems like a simple enough question, yet the factors to consider lead to ever more questions: …which way does the window face? …how much of the window should be protected? …how is the overhang length related to various Sun angles? At….

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