I am not looking forward to the day when I will have to update my Heating plus Air Conditioning unit, and currently, my unit is 15 years old, plus the lifespan of a unit is between 15 plus 25 years depending on United Statesge, care, plus wear plus tear. Over the years, I have taken wonderful care of my Heating plus Air Conditioning unit. I have typically changed the filter, got common service, plus used my unit conservatively based on the recommendations from the Department of Energy. In fact, my Heating plus Air Conditioning worker has told myself and others that my unit is still efficient plus is in good condition. Of course, over time this will change, however I am hoping that my Heating plus Air Conditioning unit could last for another 10 years. So far, I have not seen any signs that the unit will cut down anytime soon. In fact, there has never been any weird noises coming from the unit, plus I have not noticed any changes in my energy bill, nor have I noticed any difference in the comfort of my home. And I am grateful that my Heating plus Air Conditioning unit is still in good condition because the cost of replacing a unit is never something a homeowner looks forward to covering. The prices of these systems can range between $5,000 plus $10,000 depending on the size of the unit being updated, then my unit is the typical Heating plus Air Conditioning used in a medium size home, so I don’t expect to pay upwards of $10,000, but even if the unit is on the lower end, I would rather not spend that money right now. So, I will continue to repair my unit as often as possible so that I can extend the life of it for the full term of 25 years.