In Phoenix, Arizona a heating system entirely isn’t a priority. The key is to have a good cooling system to get through the long, hot year, however i have made the necessary arrangements. I own a high velocity AC system! My home is an older one plus putting in HVAC duct just wasn’t possible. The ducts are too sizable plus invasive. Ductwork upgrade means your walls plus ceiling come down to make way for the bulky ducts. I knew my frame couldn’t take it. It would literally tear the home down. I found a work around though, then with high velocity AC you have ducts that are half the size. They also are flexible plus flexible. This makes them perfect for older homes, but you can absolutely cram them into slim spaces without it being too invasive. How the unit works is what appeals to me. I prefer that the AC quickly whips around the space due to the streamlined ducts, however rather than wait 30-60 minutes to lower the temperature, it only takes a few minutes. It works fast, efficiently, plus it is quite indoor air quality safe. I think it was the best system I have ever obtained; Since I want my Phoenix, Arizona a/c to be wash plus efficient forever, I invest in regular cooling service. I have an AC corporation always come inspect plus check the inner toilings. I don’t want a repair to stop my cooling production for even a moment. In Phoenix, Arizona a good toiling cooling system is needed for just about every afternoon of the year.