It is worth it to replace my older central ACs?

My AC compressor and furnace are 18 years old. They seem to work fine, but I have high electricity bills (I live in the southern USA, average outdoor temps in the 90s). I have some extra money right now and trying to decide if I should take the opportunity to upgrade.

What sort of improvement will I see on my electricity bill? Am I better off to put that money in the bank and just waiting until I need to replace the old system?

Answers:
Yes, but do it near the end of the season. Every installer would rather sell it at a loss then to hold on to it for the next season.
Most new A/C units are so much more efficient that it will save you in your electric bull down the line. Wait to find one thats about 85% or more energy rating for less the $2000.00. It will save you at least 20 % on your next seasons monthly eletric bills. Do some shopping around cause their all basically the same, only a few companys make all the parts for almost all the brand names out there. Good luck!

Other answers:
I think you would find that the new AC units are more efficient, and altho the upfront cost may be somewhat steep, the unit should be cost effective in a few years...of course this involves the brand of unit, and what bells and whistles you may want to add...my suggestion on picking a brand is Consumer Reports, if you live in a small town, i would suggest you talk to your local AC guy to see what he can service......maintenance is the way to go
I think you would find that the new AC units are more efficient, and altho the upfront cost may be somewhat steep, the unit should be cost effective in a few years...of course this involves the brand of unit, and what bells and whistles you may want to add...my suggestion on picking a brand is Consumer Reports, if you live in a small town, i would suggest you talk to your local AC guy to see what he can service......maintenance is the way to go
You will definitely realize better AC bills with a newer unit. The seer ratings are much higher now than even 6 years ago!

Also consider solar panels for heating and/or a heat exchanger.

Talk to your local home improvement store guy. They can help.
This is sort of iffy. The A/C seems to have had heavy usage, so installing a new l3 SEER or better would probably be a good move. Changing the furnace, however, might not be so wise. If it's 80% efficient or better, and it sees light use, you might want to keep it. Goodman (owns Amana) Manufacturing Company has a 95% efficient gas furnace which might be a good choice if you opt to replace it. It's Model GMS-95 and a basic and simple piece of equipment. I believe in the "K.I.S.S." motto - keep it simple, stupid. All that equipment with multi-stage gas valves and variable-speed blowers are the costly all-the-bellos-and-whistles models. The more doodads on equipment the more there is to breakdown. Good luck.
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