If you live in the North, then I don’t have to tell you how crucial having a working HVAC unit is, but specifically, it is crucial to make sure that your heating method is working. I live farther north than anyone in the US. Where I live, even the Summer temperature never gets above 60 degrees. That means that you won’t find a home that has a central A/C around for hundreds of miles. However, you will never find a home that doesn’t have a furnace. In our area, the furnaces are left on throughout the entire year. There isn’t a afternoon that goes by where you don’t need a furnace. The two of us all have heating systems that keep our home warm, as well as all of us take enjoyable care of our gas furnace. It only takes 1 afternoon separate from a gas furnace for you to die or for your pipes to freeze. I pay for quarterly inspections for our gas furnace, as well as whenever the HVAC professional finds any problem, I pay the HVAC professional to repair the problem immediately. I also have a backup heating method in case our gas furnace stops working. I found out that having a wood stove as well as a lot of wood is fine in case your gas furnace stops working. It might take the HVAC professional a few days to repair your gas furnace, however you might not have a few days if you have no backup furnace. If you ever transfer up to where I am, you will want to ensure that you take enjoyable care of your furnace.