As of 2015, Tempstar furnaces can be purchased from independent heating and air conditioning contractors that are authorized Tempstar dealers. The Tempstar website has a feature that allows users to search for a dealer in their area by clicking on the Dealer Locator tab.
Tempstar produces nine models of gas furnaces and 11 models of oil furnaces, as of 2015. The most efficient Tempstar gas furnace is the SmartComfort EC97 Variable-Speed Modulating furnace, which features the Observer communicating system. This system uses the Observer wall control to allow various components within the air conditioner and the cooling system to communicate with each other to fine tune cooling levels and maximize efficiency. The EC97, with the federal EnergyStar label, is rated at 97 percent annual fuel utilization efficiency. Tempstar backs up this product with a number of different warranties, including a 10-year No Hassle Replacement Limited Warranty, a 10-year Limited Parts Warranty and a Lifetime Heat Exchanger Limited Warranty.
In addition to the 97 percent AFUE model, Tempstar also produces four 80 percent AFUE models, one 95 percent AFUE model and two 96 percent models. The Observer communication system is also available in both the 96 percent and 80 percent AFUE variable speed two-stage gas furnaces.