333B STANDARD FEATURES

Perfect Heat, Perfect Humidity™ operation

2-stage heating with single-stage thermostat
Reduced operating sound through low-stage operation
Super-low electrical use, up to 80% less than standard models
Increased SEER ratings for AC and HP systems
Perfectly matches CFM to cooling system at all static points
Variable-speed blower motor

Microprocessor based "smart" control center

Adapts heating stages to meet demand
Maximum dehumidification selection for summer-time cooling
Adjustable heating air temperature rise
3 constant fan selections to perfectly match home comfort needs
12 cooling airflow selections with a wide range of capability
LED diagnostics and self test feature

Patented Draft Safeguard system
• Insulated blower compartment
• 3-position furnace: upflow, horizontal right, horizontal left
• Heat pump compatible
• Hot surface ignition (HSI)
• Residential installations eligible for consumer financing through the Comfort Credit Program

LIMITED WARRANTY

• 20-year warranty on "Super S" heat exchanger
• 5-year parts warranty on blower motor
• 3-year parts warranty on blower control and His