3. Indow Windows
Indow Windows are thermal window inserts that simply press into the inside of your window frames to give you money-saving, double-pane window performance, but at a fraction of the cost. As a bonus, they reduce the noise that comes through your windows by 50% and may dramatically reduce fog and condensation on your windows. Indow Windows were a finalist in the 2011 Cleantech Open National Business Competition.
>>Up Next: Driverless Personal Vehicles
Image Credit: Flickr - opensourceway
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