An enhanced line of gas furnaces - 58MVB, 58MTB, 58MXB, and 58MCB - has an efficiency rating of up to 96.6 percent. The condensing gas furnaces come equipped with a PowerHeatâ„¢ SiN igniter. According to the manufacturer, the hot surface igniter will ignite gas more efficiently and reliably, saving fuel that is normally wasted by a continuous pilot light. The igniter is resistant to clogging, fluttering, and blowouts. The S-shaped heat exchanger uses dual heat exchangers. All of the models can be installed in single-pipe or two-pipe venting applications. The units are available with sound reduction up to 3 dB, says the manufacturer.

Carrier, Indianapolis, IN, www.carrier.com

eProduct #189