"As an HVAC technician, I thought there could be a better tool for accessing service valves and the refrigerant system," said an inventor, from Rogers, Ark., "so I invented the H V A ...

Thermoelectric coolers (TECs), also known as Peltier coolers, are semiconductor devices that rely on the Peltier effect, discovered in 1834 by the French physicist Jean Charles Athanase Peltier ...