System and method for evaluating changes in the efficiency of an HVAC system | Patent Publication Number 20100070234

US 20100070234 A1
Patent NumberUS 08019567 B2
Application Number12211690
Filled DateSep 16, 2008
Priority DateSep 17, 2007
Publication DateMar 18, 2010
Original AssigneeTrane
Current AssigneeEcofactor Inc.
Inventor/ApplicantsJohn Douglas Steinberg
Scott Douglas Hublou
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