Best Reviewed
Central Air Conditioners
- Lowest running costs, but higher initial price High-efficiency 16 to 23 SEER central air conditioner *Est. $3500
- Balance between ongoing energy costs and initial price Mid-range efficiency AC, 14.5 to 17 SEER *Est. $3000
- Best for low-use, for rental units or for tight budgets Minimum-efficiency central AC unit *Est. $2500
- Option for those without existing ductwork Mini-split ductless air conditioning system *Est. $1000
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Best for low-use, for rental units or for tight budgets
- Low upfront costs
- More efficient than most older air conditioners
- More costly to operate than higher-efficiency units
Although they're nowhere near as efficient as mid-range or high-efficiency central air conditioners (starting at *est. $3,000 to $3,500), low-efficiency air conditioners can still be considered highly efficient by the standards in place a decade ago. This means that, if you're replacing an old model, even a low-efficiency unit will reduce your electricity rates by as much as half. If you're on a tight budget and no rebates are available in your state, experts say a 13 to 14.5 SEER (seasonal energy efficiency rating) air conditioner is your best choice, and some contractors believe that these are the best value overall. Some models have scroll compressors and use more environmentally friendly R-410A refrigerant, but your monthly bills will still be higher than with higher-efficiency units.
Reviewers do not test or compare specific central air conditioners. Plenty of sources weigh in on the virtues and drawbacks of minimum-efficiency central air conditioners, including ACCA (Air Conditioning Contractors of America), FurnaceCompare.com, TheGreenGuide.com and Sensible Home's columnist James Dulley.
Our Sources
1. ACCA (Air Conditioning Contractors of America)
This professional organization provides most of the information consumers need to know when buying a central AC unit, except help in locating specific brands and models. The articles here cover such topics as choosing the right contractor (including a locator tool) and maintenance tips.
Review: For Homeowners and Building Managers, Jim Herritage
The comprehensive buying guide here has good information, but there is no discussion about the authors'. Brands of central air conditioners are rated for average efficiency, but the editors admit that this has nothing to do with their quality or durability.
Review: Central Air Conditioners, Editors of FurnaceCompare.com
3. Sensible HomeDetails/Subscribe
Columnist James Dulley offers general advice about central air conditioners and provides information about the most energy-efficient models. This article comes as close to recommending specific models as any source we found, but all the well-known manufacturers are included, which dilutes the article's value.
Review: 2008 Central AC Models Save Money, the Ozone Layer with Better Comfort, James Dulley, 2008
TheGreenGuide.com focuses on environmental considerations when buying a central air conditioner, to the exclusion of actual tests. In spite of these shortcomings, though, the advice here is excellent.
Review: Air Conditioners (Central), Solvie Karlstrom, June 2007