03 Apr '12, 3pm

Do I Really Want Radioactive Windows?: A state-of-the-art, multiple-low-e-coating Serious Window with xenon gas

When a low-e coating is added to a window (see last week's blog), the radiant component of that heat loss is significantly reduced, and as a result the conductive and convective portions become much more significant. As the name implies, low-conductivity gas fills reduce conductive heat flow. Most of us think of conduction, which is the transfer of kinetic energy from molecule to molecule, as occurring only through solids--think of a hot cast-iron skillet handle--but conduction also occurs across gases. Sometimes we refer to this as gas-phase conductivity . The Noble gases Air has a thermal conductivity of 0.014 Btus per square foot per hour for every degree Fahrenheit difference in temperature (don't worry about those units) at room temperatures. If we can replace that air with a lower-conductivity gas, we can slow the heat loss through windows. Argon is a great option. I...

Full article: http://www.buildinggreen.com/live/index.cfm/2012/4/3/Do-I...

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WANT! @nikesb

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