Rgausman - very interesting (in its simplicity) flow meter. Thanks for the pix and sharing. We're your WEL numbers from stage 1 or 2 operation? Sean5545 - I've got the TS (split) 049, but your data points are helpful for pointing me towards where to look for mine. I don't have refrigerant gauges, but considering my unit is only 14 months old and advice given is to check pressures only if necessary I may have to assume all is ok there. Thanks! Curt - I really want that job! Potentially 2 feet of snow hitting NY tomorrow night. When can I start? Palm trees and geo... Aahhhh... But seriously, I took voltage, current, and air temps today, but all in stage 1. Should my calcs be done in stage 2? Regarding total airflow, my tstat does not allow adjustment of CFMs for stages, so would I use the default values published in the manual?