Carrier air conditioners must be purchased through a local independent Carrier dealer, as of 2015. The Carrier website includes a feature that allows customers to search for a local dealer based on the user's ZIP code.
Carrier produces three different lines of air conditioners and around 15 different models, most of which are available in various sizes and capacities. The Carrier Infinity Series is the company's high end line, which contains five models that range in energy efficiency from 16 to 21 SEER. Four of the models are Energy Star rated in all sizes, while only some sizes of the Infinity 19VS feature the Energy Star label. The Infinity 21 model is the most efficient air conditioner produced by Carrier and was named a Consumer's Digest Best Buy.
The Carrier Performance Series is the company's middle range line of air conditioners, whereas the Carrier Comfort Series contains the least efficient and least expensive models. The Performance Series consists of five different models. Two of these models, the Performance 17 and Performance 16, are Energy Star rated in all sizes. There are six different models in the Carrier Comfort Series, two of which are also Energy Star rated in all sizes.