331AAV STANDARD FEATURES

Perfect Heat™ operation

2-stage heating with single stage thermostat

Reduces sound levels and temperature swings between cycles

Reduces temperature differences between rooms

Increases indoor air quality by circulating more air through furnace filters and humidifier

Reduces cycling which increases reliability and reduces drafts from "cold blow" every time the furnace comes on.

Smart control with electronic air cleaner and humidifier connections
Patented blocked vent safeguard to ensure proper furnace venting
• Insulated blower compartment
• Multi-speed, direct-drive PSC blower motor
• 4-pass aluminized steel heat exchangers
• Induced combustion
• Framed high-velocity air filters
• Hot surface ignitor (HSI)
• Residential installations eligible for consumer financing through the Comfort Credit Program

LIMITED WARRANTY

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