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High efficiency heat exchanger
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Patent number 4,825,664
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Issue date May 2, 1989
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Kool-Fire Limited
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Gerry Vandervaart
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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Heat exchanger coil
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Patent number 4,429,734
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Issue date Feb 7, 1984
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Kool-Fire Limited
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Gerry VanderVaart
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F24 - HEATING RANGES VENTILATING
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Heat-augmented heat exchanger
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Patent number 4,420,034
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Issue date Dec 13, 1983
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Kool-Fire Limited
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Gerry VanderVaart
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F24 - HEATING RANGES VENTILATING
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Heat-augmented heat exchanger
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Patent number 4,311,192
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Issue date Jan 19, 1982
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Kool-Fire Limited
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Gerry VanderVaart
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F24 - HEATING RANGES VENTILATING