System and method for evaluating changes in the efficiency of an HVAC system | Patent Publication Number 20120065935

US 20120065935 A1
Patent NumberUS 08423322 B2
Application Number13230610
Filled DateSep 12, 2011
Priority DateSep 17, 2007
Publication DateMar 15, 2012
Original AssigneeTrane
Current AssigneeTrane
Inventor/ApplicantsJohn Douglas Steinberg
Scott Douglas Hublou
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