The 556A Quantum Plus, the Evolution and the Preferred are among the best-reviewed Bryant air conditioner models. Furnace Compare, TopTenReviews and ACDoctor have posted favorable reviews of these models.
Furnace Compare lists the 556A Quantum Plus as the most popular Bryant model, with all customer reviews marked as very satisfied. The Preferred model is listed as the second most popular with six of the nine customer reviews checked as very satisfied.
TopTenReviews concludes that the Preferred is a good overall value with a Seasonal Energy Efficiency Ratio of 16.5. The final score for the model is 6.25 out of a possible 10.
The Evolution model has an excellent Seasonal Energy Efficiency Ratio of between 16 and 20, according to ACDoctor. The Preferred model also gets high marks for value and energy efficiency.