Tempstar NTG3 and NTN3 (low NOX model) gas furnaces, with upflow horizontal-left and -right capability, are targeted for the new construction and multifamily replacement markets. Selected models of the NTG3 family of 80%-AFUE furnaces deliver approximately 2,200 cfm at 0.5-in. static pressure, allowing higher airflow than the normal 2,000-cfm blower motor assemblies, says the company. Downflow models, the NDN3 Series, are also offered. The patented, weldless, aluminized heat exchangers carry a 20-year limited warranty.