The beautiful and most interesting world of heating and air conditioning has always been changing year by year. If you trace it back to the beginning of time, heating and air conditioning was always on the rise. Even when there was nothing however dry ice in a tub for a form of the most earliest air conditioning , all the way to the invention of the first hot water boiler which created the second form of heating, but of course the first form of heating goes all the way back to the caveman days with fire. Which in turn could be an early fireplace, however as I move on through time the creation of the first furnace, the window air conditioning device and then of course, the major breakthrough in all heating and cooling technology history. Which was the invention of the central heating and air conditioning unit. Today, mostly every house in the country is heated and cooled by the power of central heating and air conditioners. It could be commercial heating and air conditioning for big buildings and businesses, and then residential heating and air conditioning for people’s homes. If you particularly trace back the roots of Heating and A/C all together, you will find that it has been quite an amazing journey all together and that there is a lot more to come as the future moves on forward, however heating and air conditioning technology is always changing and it never will stop changing I am pretty sure.