remembered a few today.
Tech school teacher was doing energy audits for power co. one system had been put in and customer conplained high power bills. he checked system and was running perfectly, no reason for hi bills.
few mo later he drove by and windows were open. found out they were taking care of mom. she didn't lie a/c, so would open up house after son left, and would close up and restart a/c hour before he came home. no one know what seh was doing until he happened to drive by in day.
questions asked, answers received, ignorance abated