From inside (document excerpt):
INFINITYTM 96 MODEL 58MVB DELUXE 4-WAY MULTIPOISE VARIABLE-SPEED CONDENSING GAS FURNACE Series 100 Input Rates: 40,000 thru 120,000 Btuh Product Data Comfort HeatTM technology, the ultimate in heating comfort. The Carrier InfinityTM 96 with ComfortHeatTM technology achieves the optimum combination of comfort and efficency. The InfinityTM 96 achieves industryleading 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, ComfortHeatTM 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 1 degree of the thermostat setpoint. Because it operates in low heat most of the time, the InfinityTM 96 uses up to 80% less power than single-capacity furnaces. In addition to providing ultimate comfort, the InfinityTM 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 InfinityTM 96’s outstanding performance. Carrier stands behind quality. We offer lifetime warranty protection* on the heat exchangers, the heart of the InfinityTM 96. The rest of the unit is backed by a limited 5-year warranty. The InfinityTM 96 is available in 6 heat/ airflow combinations. The unit has a 4-way multipoise design and can be installed in upflow, downflow, or A05069 horizontal positions covering up to 24 different applications. The InfinityTM 96 can be installed as a Non-Direct vent/1pipe or Direct vent/2-pipe. The versatile 4-way multipoise design in conjunction with variable speed makes the InfinityTM 96 is ideal for use with splitsystem cooling, including2-speed units. A Carrier electronic air cleaner, humidifier, ThermidistatTM, comfort ventilator, and Comfort ZoneTM II will provide yearround comfort and efficiency. Designed for durability, comfort, and reliability, the InfinityTM 96 is the ultimate in versatile, efficient comfort. Carrier Infinity® System — When the InfinityTM 96 variable-speed gas furnace is matched with the Infinity Control and an air conditioner or heat pump, you will experience the ultimate in ComfortHeatTM and Ideal Humidity through unparalleled control of temperature, humidity, indoor air quality, and zoning. The Carrier Infinity System also provides unprecedented ease of use through onscreen, text-based service reminders and equipment malfunction alerts. For even greater comfort and convenience, match the InfinityTM 96 furnace with an Infinity air conditioner or heat pump.