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      <marc:subfield code="a">Optimizing the operation of condensing boilers in existing buildings : </marc:subfield>
      <marc:subfield code="b">a well-honed skill.</marc:subfield>
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      <marc:subfield code="b">Natural Resources Canada = Ressources naturelles Canada, </marc:subfield>
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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: L’optimisation de l’opération des chaudières à condensation dans les bâtiments existants : un savoir-faire éprouvé.</marc:subfield>
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      <marc:subfield code="a">Includes bibliographical references.</marc:subfield>
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      <marc:subfield code="a">"The main advantage of a condensing boiler is its ability to capture and reuse the heat that is normally lost during the combustion process in conventional boilers. In a condensing boiler, the hot gases from burning fuel are passed through an extra heat exchanger (Figure 1), which allows to capture more of this heat, instead of it being vented to the atmosphere"--Page [1].</marc:subfield>
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      <marc:subfield code="a">Boilers</marc:subfield>
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      <marc:subfield code="a">Greenhouse gas mitigation</marc:subfield>
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      <marc:subfield code="a">Canada. </marc:subfield>
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      <marc:subfield code="t">L'optimisation de l'opération des chaudières à condensation dans les bâtiments existants : </marc:subfield>
      <marc:subfield code="w">(CaOODSP)9.921446</marc:subfield>
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      <marc:subfield code="q">PDF</marc:subfield>
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      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2025/rncan-nrcan/M154-157-2024-eng.pdf</marc:subfield>
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