Having upgrade of a brand up-to-date and really current heating, ventilation, and A/C plan is not something someone should take lightly in the least. When choosing and installing a brand up-to-date and really current heating and cooling system, there are a lot of factors that have to be considered. One being is the heating, ventilation, and A/C plan powerful enough to heat your entire home? It all depends on the size of your home and the power that the heating, ventilation, and A/C plan is able to put out. If you own a mansion and are rich, you may want to look into investing in 1 of those industrial sized central heating and cooling systems like they have in sizable corporate office buildings and sizable malls plus department stores. Big industrial sized central heating and cooling systems cost a ton to even get, but if you are rich, you can afford it and it would not matter anyhow… Me personally, I am your average joe, and a general top of the line and really current central heating, ventilation, and A/C plan is what I got installed into my home. I had to take out a small loan from my local bank, but it did not matter to me, because I needed and wanted the really best in new heating and cooling technology for my home. I made the mistake once a really long time ago in getting a cheap central heating and cooling system, and it cost me tons in heating plus air conditioning repair! Never again I said!