When your heating and cooling system isn’t working properly, you might throw up your hands and call for help, thinking the ...

An air conditioning, heating and refrigeration (AHR) technician is trained to design, install and service air conditioning, heating and refrigeration equipment in residential and light commercial ...

Willis Haviland Carrier designed and launched the first-ever air conditioning system in July 1902. For its time, it was an absolutely revolutionary innovation in technology that fundamentally ...