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Portal:Heat exchangers

55 bytes removed, 18:31, 27 January 2011
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[http://en.wikipedia.org/wiki/Energy_recovery_ventilation Energy recovery ventilators]
[http://en.wikipedia.org/wiki/Shell_and_tube_heat_exchanger http://en.wikipedia.org/wiki/Grate_heater Grate heater] <br>
[http://www.appropedia.org/Ground_source_heat_pumps Ground source heat exchanger]<br>
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