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HVAC faults usually go undetected, which is a problem, since they can severely compromise a the energy efficiency of a home's HVAC system

United statesSan antonioEric werlingTom downeyEric martinBryant hainsAmerica werlingDavid yuillJuliet grableHugh magandeJon winklerBuildings research divisionEnergy information administrationEmerson electricFlorida solar energy centerProctor engineering group