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  1. thornx

    Navien NFC "Supply/Return Temperature" vs. "SYSTEM Supply/Return Temperature"

    Hello, Under 'Status Information' my NFC-175 displays a "5.Supply Temp", and a "6.Return Temp". Then further down it shows "7. Sys Supply Temp" and "8.Sys Return Temp" I understand the difference between Supply and Return Temperatures, but was curious about "System" temps.... I spoke with...
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