Where are the most reliable reviews on the best central air conditioners online?This review website features the top 10 central air conditioning units as of 2015 and rates each model according to efficiency, comfort, design, help and support, and overall performance. What are some air conditioners with positive reviews?, the best central AC unit of 2015 is the Dave Lennox Collection XC25. This model received the top grade in efficiency and design and was rated with an overall score of 9.75 out of 10. One standout feature of the Dave Lennox Collection XC25 is its SunSource solar-ready design. What do reviews say about Sylvania air conditioners? Reviews about Sylvania air conditioners are mixed. Reviews highlight the useful panel design and lightweight design, but they also note problems with using... What are reviews on ductless air conditioners? Reviews of ductless air conditioners highlight the pros and cons of a brand and can compare one brand to another.