As you celebrate Earth Day 2013, find out if you're living as "green" as you think.
A solar attic fan requires no electricity, cooling your attic with the use of solar power. A 30 percent federal tax credit is also available on purchase and installation costs through 2016. But they're also expensive at $400-plus per fan, and studies have shown you'll need at least two or three to make a difference on cooling costs.
National Archives and Records Administration
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