1. Induced draft venting quietly draws hot gases through the heat exchanger, maximizing the heat transfer efficiencies of the exchanger design.

2. Heavy steel insulated cabinet holds more heat in the furnace to better warm your home. Also assures greater durability and quieter operation.

3. Multi-port in-shot burners perfectly shape the flame cone for the maximum heat possible, while using less fuel.

4. Sound-insulated blower compartment contributes to the Freedom 80's quiet operation.

5. Multi-speed blower operates quietly and efficiently, gently warming and maintaining comfort. The high speed facilitates peak heating. Handles all central air conditioning needs too.

6. Aluminized steel heat exchanger is crimped, not welded, to prevent heat stress cracks. Stamped serpentine channel offers greatest efficiency in less space. Backed by our 20- year, non-prorated limited warranty.

7. Two-stage gas valve works efficiently with the multi- speed motor, providing only as much fuel as each stage requires.

8. Adaptive hot surface silicon nitride igniter starts burners electrically for safe, efficient operation. There's no pilot light constantly burning fuel.

9. Self-diagnostic controls are the solid-state "brain" of the Freedom 80 and manage every function with digital accuracy. Includes safety features and a built-in troubleshooting system.