From inside (document excerpt):
Product Data 58UHV, 58UXV WeatherMaker 8000VS with Comfort Heat TechnologyTM Deluxe Upflow/Horizontal Furnace Series 120 & 130 Input Capacities: 60,000 thru 120,000 Btuh Comfort Heat Technology with Variable Speed Knowhow Carrier leads the industry with our new WeatherMaker 8000VS Upflow/Horizontal InducedCombustion Gas Furnace. This furnace can operate at a wide range of airflow settings which provide outstanding home comfort.
The WeatherMaker 8000VS 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. The WeatherMaker 8000VS is the latest addition to Carrier’s list of product leadership in the gas furnace industry. These variable-speed inducedcombustion, 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%. The WeatherMaker 8000VS offers outstanding efficiency year round. The efficiency provided by the variablespeed blower motor can add up to 1 point in seasonal energy efficiency ratio (SEER) to an air conditioner or heat pump system. Also, because this motor is so efficient, you can run year-round constant fan guilt-free! In most places it’s less than $30 a year. The 2000 Carrier Corporation Form 58UHV-4PD WeatherMaker 8000VS utilizes a hot surface ignition system to save energy and increase reliability. Our design uses the patented S-shaped 4-pass heat exchanger, a soft mount 2-speed inducer assembly, and a 2-stage slow-opening gas valve to minimize sound level. The Super-S heat exchanger provides better heat transfer while enabling us to make a compact furnace. This provides more room in closet, utility room, and short basement installations. The heat exchanger is constructed of aluminized steel and is backed by a 20-year Limited Warranty. The WeatherMaker 8000VS will meet your home heating requirements. This furnace family provides a wide range of heating capacities. All models are GAMA efficiency rating certified. The 58UXV models are certified for use in California Air Quality Management Districts. The superior attention to cabinet detail is obvious. The WeatherMaker 8000VS features 1-piece, seamless, wrap-around construction. There are no spot welds on the exterior surfaces. 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 8000VS is the stateof-the-art microprocessor control which shows true leadership in furnace technology.