From inside (document excerpt):
Product Data 58DXT WeatherMaker® 8000TS Energy-Efficient Downflow Comfort Heat TechnologyTM Gas Furnace Series 120 California Approved Input Capacities: 60,000 thru 100,000 Btuh Comfort Heating for Energy Efficient Gas Furnaces Carrier continues to lead the industry with our new WeatherMaker® 8000TS Downflow Induced-Combustion Gas Furnace. Our furnace operates at 2 different heating stages which provide outstanding home comfort.
This furnace is built with the most advanced manufacturing equipment processes and technology available in order to ensure top quality. Packed into the cabinet are the industry’s foremost dealer and homeowner features. These Comfort Heat TechnologyTM induced-combustion, gas-fired furnaces offer not only low installation costs, but fuel economy as well–delivering an Annual Fuel Utilization Efficiency (AFUE) rating of 80.0 percent. The WeatherMaker 8000TS utilizes a hot surface, silicon carbide ignition system to save energy and increase reliability. Our engineers have incorporated the patented S-shaped 4-pass heat exchanger, a soft mount 2-speed inducer assembly, and a 2-stage slowopening gas valve to minimize sound level. The Super-S heat exchanger provides better heat transfer while enabling us to make a compact furnace, providing more room in closet, utility room, and short basement installations. The heat exchanger is constructed of 1999 Carrier Corporation Form 58DXT-4PD aluminized steel and is backed by a 20-year Limited Warranty. The WeatherMaker 8000TS will meet your home heating requirements. This furnace family provides a wide range of heating capacities. All models are GAMA efficiency rating certified and certified for use in California Air Quality Management Districts. The superior attention to cabinet detail is obvious. The WeatherMaker 8000TS features 1-piece, seamless, wrap-around construction. There are no spot welds on the exterior surfaces of the furnace. There is also double protection for the cabinet. First, a galvanized steel substrate provides resistance to rusting. Then the cabinet is constructed of prepainted steel–the same high-quality finish found on refrigerators and dishwashers. Perhaps the most advanced feature of the WeatherMaker 8000TS is the stateof-the-art micro-processor control center which shows true leadership in furnace technology. The simplified electronics in this control provide high reliability while performing many of the functions of older, electro-mechanical devices in other furnaces. The control provides blower delay at start-up and shutdown, while monitoring furnace operations and functions. In the unlikely event of a service call, in less than a minute, the technician can use the component-test feature to determine if a major component has failed.