In 1816 Robert Stirling invented an engine that operated by heating and cooling air in a closed cycle. The cycle has now been "reversed" in an efficient machine for cooling things to very low ...

Before a home or office cooling system stops working, there are often signs, if you notice them early enough, that can help ...

Heating, air conditioning, and refrigeration (HVACR) technicians, also called installers or mechanics, work on the systems that control the temperature, humidity, and quality of the air in our homes, ...

air conditioning and refrigeration class. “There’s so much more we can do now like taking the top off so we can see everything work in the refrigeration cycle, or testing subcooling and superh ...