A New Hampshire company has invented a way to capture the heat that emanates from concrete rooftops, pool and deck patios, plazas and sidewalks. The "ThermaPaver" by Therma-HEXX is an insulated aluminum heat exchanger sized to match concrete and stone pavers. The ThermaPaver converts a "simple block of concrete into a productive, green, manageable building component," said company owner Robert Barmore.

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