About thirty years ago the wife got tired of waiting on me to install a set-back thermostat on the furnace. She grabs a screwdriver and does the install, but later asks me, why the settings were only Sunday through Friday? Thirty years ago the timers were mechanical with a S(slow) and F(fast) setting! After a quick explanation she laughed , but I have to bring the incident up on occasion, just to keep her humble!
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