From inside (document excerpt):
INFINITYt 96 MODEL 58MVB DELUXE 4 WAY MULTIPOISE VARIABLE SPEED TWO STAGE CONDENSING GAS FURNACE Series 120 Input Rates: 40,000 thru 120,000 Btuh Product Data Comfort Heatt technology, the ultimate in heating comfort. The Carrier Infinityt 96 with Comfort Heatt technology achieves the optimum combination of comfort and efficency. The Infinityt 96 achieves industry-leading ultra-high efficiency at up to 96.6 percent Annual Fuel Utilization Efficiency (AFUE).
Efficient performance is enhanced through the variable-speed design. To maintain ideal comfort, Comfort Heatt technology automatically adjusts the heating level, maximizing the use of low heating levels that produce near silent furnace operation while meeting the exact heating needs. This unit is designed to keep the indoor temperature within less than 1 degree of the thermostat setpoint. Because it operates in low heat most of the time, the Infinityt 96 uses up to 80% less power than single-capacity furnaces. In addition to providing ultimate comfort, the Infinityt 96 has a sealed combustion system. This system brings combustion air to the furnace and vents flue gases outside the furnace in a safe manner. Because it is sealed, operational noise is minimal. A sealed combustion system also means fewer cold drafts and less air infiltration. Quality materials are the key behind the Infinityt 96’s outstanding performance. Carrier stands behind quality. We offer lifetime warranty protection* on the heat exchangers, the heart of the Infinityt 96. The rest of the furnace is backed by a limited 5-year warranty. The Infinityt 96 is available in 6 heat/airflow combinations. The unit has a 4-way multipoise design and can be installed in upflow, downflow, or horizontal positions covering up to 24 different applications. The Infinityt 96 can be vented as a Direct vent/2-pipe furnace or as a non-direct vent/1-pipe application. The versatile 4-way multipoise design in conjunction with variable speed makes the Infinityt 96 ideal for use with split system cooling, including 2-speed units. A Carrier Infinityt air purifier, humidifier, comfort ventilator, and Comfort Zone II control will provide year round comfort and efficiency. Designed for durability, comfort, and reliability, the Infinityt 96 is the ultimate in versatile, efficient comfort. Carrier Infinityr System — When the Infinityt 96 variable-speed gas furnace is matched with the Infinityt Control and an air conditioner or heat pump, the homeowner will experience the ultimate in Comfort Heatt and IdealHumidityt through unparalleled control of temperature, humidity, indoor air quality, and zoning. The Carrier Infinityt System also provides unprecedented ease of use through onscreen, text-based service reminders and equipment malfunction alerts. A05069 1 For even greater comfort and convenience, match the Infinityt 96 furnace with an Infinity air conditioner or heat pump. This will create a fully communicating system, requiring only 4 thermostat wires between system components. In some cases, troubleshooting can even be done from the outdoor unit without entering the home. Optional remote access through telephone or Internet is also available when combined with a remote connectivity kit.