Recent activity in Energy Conservation & Green Building

List three passive design strategies for improving energy efficiency in a building.

In the context of green building and energy conservation, what is the fundamental difference between R-Value and U-Value, and why is one typically used for individual materials like insulation, while the other is used for complex assemblies like windows?
Answer : The fundamental difference is that they are mathematical reciprocals of each other, measuring opposite things: **R-Value measures resistance to heat flow**, while **U-Value measures the rate ... envelope that conserves energy by keeping heat inside during the winter and outside during the summer....