My wife and I are purchasing a lake house that needs a current Heating and Air Conditioning system. I genuinely knew nothing about Heating and Air Conditioning technology before research and I will tell you 1 thing, it gets genuinely confusing, and for example, it’s possible to use a smart control unit to turn your air conditioning or your heat up and down while in the day or to even program the Heating and Air Conditioning unit to turn itself up and down, but my Daddy regularly told myself and others to set the control unit and leave it at that temperature because turning it up and down works the plan more than it should have to and will increase utility bills. Now, I don’t think what to believe. I never knew that there were so multiple ways to heat and cool your home. I come from a wealthy tropical town where heat and air conditioning usually both come from a self contained unit attached to indoor air vents; The two of us rarely used heat and it came from a heated coil in the self contained system, however until I spent some time up North, I didn’t even think what a gas furnace was! And there are so multiple kinds! What is genuinely annoying me, though, is the whole-house air purifiers. From what I understand, there are some that can be installed on an existing Heating and Air Conditioning unit that uses HEPA filters. Then there are the UV light whole-house air purifiers that chop down the genetic material of viruses, bacteria and other microbes to keep them from reproducing, however that would require at least 1 light being on all the times and I don’t think that I like that idea. Fortunately, our wife and I have a meeting with an Heating and Air Conditioning worker next month at the current site. Maybe she can clear some things up for me.