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      <marc:subfield code="a">At head of title: Fact sheet.</marc:subfield>
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      <marc:subfield code="a">Issued also in French under title: Technologies de thermopompes.</marc:subfield>
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      <marc:subfield code="a">"This fact sheet provides an overview of heat pump technologies, including air-source, water-source, and variable refrigerant flow systems, and offers key performance metrics to consider when using this technology. The document also discusses the challenges to be aware of when using the technology, along with opportunities for energy reduction"--Page [1].</marc:subfield>
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