1. Heavy steel insulated cabinet gives you greater durability and quieter operation, ensuring that more heat circulates into your home.

2. Aluminized heat exchanger is made of heavy-duty aluminized steel for longer life. Each exchanger is crimped, not welded, to prevent heat stress cracks. Backed with our 20-year, non-prorated limited warranty.

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

4. Hot surface igniter lights burners electrically for safe and efficient operation. There's no pilot light to constantly burn fuel.

5. Two-stage gas valve works efficiently with the variable- speed blower by providing only as much fuel as each stage requires.

6. Variable-speed blower motor operates at a lower, more efficient speed than conventional blowers. This design eliminates short- cycling, the frequent starting and stopping common to many conventional furnaces

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

8. Sound-insulated blower compartment assures quiet operation.

9. Cleanable filter lets you rinse or vacuum instead of buying replacements each time. Easy to remove.

10. Self-diagnostic controls, the solid-state brain, controls every function of the Freedom 80 with digital accuracy, complete with safety features and a built-in troubleshooting system.