Opaque

Opaque 3.0

Draws a detail of wall or roof sections calculates U-value

3.0.4 Latest version
Freeware Absolutely free
Developer UCLA Dept. of Architecture and Urban Design

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Draws a detail of wall or roof sections, calculates U-value, Time Lag, and Decrement Factor. It plots temperature drop through the section. Draws 2-D daily and 3-D annual plots of Outdoor and Sol-Air Temperatures, Normal and Total Surface Radiation, and Heat Flow through the envelope.
It was originally called SOLAR-3.

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