23 57 00 Heat Exchangers for HVAC

23 57 19.13 Plate-Type, Liquid-to-Liquid Heat Exchangers

23 57 13Steam-to-Steam Heat Exchangers23 57 16Steam-to-Water Heat Exchangers23 57 19Liquid-to-Liquid Heat Exchangers23 57 19.13Plate-Type, Liquid-to-Liquid Heat Exchangers23 57 19.16Shell-Type, Liquid-to-Liquid Heat Exchangers23 57 33Direct Geoexchange Heat Exchangers

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