In 1975 I invented a dual furnace thermostat that automatically turned down the heat when people went out or went to sleep. It used people sensors instead of timers. It cut the gas bill for my four bedroom home in half. To my frustration, I could not even give the idea away. Nobody was interested. Today the idea might be reinvented at even lower cost using wireless sensors and cheaper electronics.
~ Roedy (born: 1948-02-04 age: 64)