Verified® patented NTD software evaluates proper operation or AC system faults without connecting refrigerant pressure sensors to reduce refrigerant venting 50%. Our NTD software is approved by the California Public Utilities Commission (CPUC) for the SWSV014-01 Lifecycle Refrigerant Management (LRM) measure package to evaluate low airflow, low capacity, condenser/evaporator heat transfer, expansion devices, restrictions, non-condensables, refrigerant charge, and economizer outdoor airflow (US Patents 7,500,368, 8,583,384, 9,207,007 and pending patents).