Written 2 Things are needed. 1. A local guy you can trust that can do the calculation on your home, I believe its called Manual J, to find the correct size of an air conditioner you need and then install it. and buy a new unit for cheap.Written I highly recommend doing comparison shopping so you can see which product fits your budget and needs the best. This is an example of an article discussing different AC pricing options:Rheem Air Conditioner Prices: Costs, Pros, Cons, and MoreWritten The lowest cost of replacing your AC unit would be not replacing it. It very important to determine if it is really necessary to replace the unit or its replacement moment may be ahead on time. I will give you some expert’s tips to take into account when considering to buy a new AC unit.Take note of the age: If your unit is being on use for less than 10 years, it may be not necessary to replace it.Lists the times when the unit has been repaired: If your unit only requires the visit of a professional maintenance service once a year, it is probably good to go some more years.

Analyze your energy bill: If you don’t see any weird peaks of consumption that you cannot identify, this constant indicates that your AC unit is still working properly.Finally, a professional evaluation of your AC unit will tell you with accuracy how long can you keep using it, or if there are any signs of imminent failure.Written Aside from bargain shopping for a unit, you can do a variety of things throughout your home to save on energy costs and help your AC unit not run so often. indoor central ac unitYou can find plenty of tips by searching around here: Applegate Home Comfort | through wall air conditioner dimensionsHVAC Repair Services | what does 4 ton ac unit meanLansing MIHope that helps 340 posts, read 414,887 times 1,135 posts, read 1,624,739 times

589 posts, read 882,928 times 1,345 posts, read 1,756,296 times 5,150 posts, read 5,049,224 times 8,406 posts, read 14,815,803 times Originally Posted by Glmore My home is 1600 sq. ft. , and I replaced the 3.5 ton AC unit and air handler a couple years ago for $2900. That is closer to the lower end than the higher end. The furnace was, and is, fine. Someone said 1 ton per 500 sq. ft., and I agree. I wanted supercooling ability, but was told if the unit cools the home too quickly, it doesn't remove enough humidity. I didn't understand that when I did the first system 12 years ago, but I learned.But in homes the size of yours and mine, zoning simply means closing a vent or two to redirect the air. The master suite is upstairs in my tri-level home, and I closed all the vents on the bottom floor to force more cool air into the master suite, It works well, since I don't use the downstairs bedrooms, They stay cooler anyway, year round. Our homes aren't big enough to warrant a true zoned system.

Originally Posted by Sean_CLT Good luck selling that house. You may not be able to have window units depending on your neighborhood rules. Window units are noisy, air leaks around them, bugs can get in, they are easily stolen and provide an easy entrance for would-be burglars, etc. They are a last resort IMHO. 104 posts, read 221,403 times Originally Posted by vmaxnc Some good info .....could you PM me the company you used for your AC replacement? 3,915 posts, read 2,674,064 times Having paid to replace several ACs myself in different homes, I will add the following. If you are comfortable in your home now, then there isn't any need to change how it works by adding zones, etc. If it is a builder grade system you are changing, you should however look at increasing the efficiency and reducing the noise while you have the opportunity to do so. Stick to a middle of the range unit. That last % or so of efficiency isn't worth it. You should probably pay for a 2 speed system.