Machine
11 of 15 from Photo quiz: Gear for green buildings
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The answer to the previous question is B, insulating and air-sealing foam from a company called Iclyene. If you've done any serious work on retrofitting a home to be more energy efficient, you know that foam--which hardens in a few hours--can be used extensively to seal air holes to stop leaks or build funny-looking structures.
Next question: This machine is used to heat a home. It is :
A. ground-source heat pump.
B. micro-combined heat-and-power system.
Answer and new question on next page.
March 16, 2009 4:00 AM PDT
Photo by: Martin LaMonica/CNET
