Tandem Windows for High Energy Efficiency
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United States of America Patent
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Jan 24, 2017
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Jan 24, 2017
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Abstract
A configuration of tandem high efficiency primary windows is disclosed as both a structure and method to enhance the energy efficiency of windows. Each of the tandem windows is separately installed, respectively, on the exterior and interior of a building window opening. Each window may be separately operable for opening, closing, and cleaning. The interior window can include a cover, surrounding any part of the frame that protrudes into the interior space, the cover having an air gap for interior air to circulate and remove moisture from the interior surfaces of the interior window and its frame. The space between the windows is vented for removal of water vapor, if necessary, by a tube that extends from the space to the outside or to the cold side of the window opening, the tube having features that prevent the entry of outside into the space between the windows.
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