A thermostat is simply a switch that turns on or off a furnace/air conditioner. A ‘programmable thermostat’ changes the parameters of the switching. Everyone understands that a furnace will run less if the temperature is set lower, obviously reducing the amount of fuel used to maintain the desired climate. There are 4 types of programmable thermostats; 5-2, 7-day, adaptive, and evolution style. 1. 5-2 refers [...]
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