1. Heavy Steel Insulated Cabinet
Insures more heat circulates into your home, increases durability and reduces sound.

2. Primary Heat Exchanger
Crimped, not welded, to prevent stress cracks- made from heavy-duty aluminized steel for long life.  Backed by a lifetime limited warranty.

3. Stainless Steel Secondary Heat Exchanger
AL29-4CTM  is corrosion resistant and captures more of the heat you pay for to warm your home.  Backed by a lifetime limited warranty.

4. Variable-Speed Draft Inducer
Quietly provides proper gas combustion.

5. Hot Surface Igniter
Our adaptive hot surface silicon nitride igniter is more reliable.  It eliminates the need for a wasteful pilot light by starting the burners electrically (not shown).  It "learns" as your system operates.

6. Direct Vent Option
Uses 100% outdoor air, for cleaner air, comfort and longer furnace life.

7. Two-Stage Gas Valve
Provides only as much fuel as each stage requires, for greater efficiency.

8. Dual Door Latches
Provide easy access to components reduces service time. (Upflow only)

9. Variable-Speed Blower Motor With Comfort-RTM
Operates as a lower, more efficient speed than conventional blowers.  Trane's exclusive Comfort-RTM feature provides greater humidity control during cooling.

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

11.  Self-Diagnostic Controls With LifePortTM
Controls every function with digital accuracy, complete with safety features and a built-in troubleshooting system.

12. Internal Vent Pipe
Built with super-durable CPVC materials.

13.  Automotive-Grade Gaskets
Reduce operating sound and air leakage.

14. Sealed Combustion
The burner compartment is sealed allowing for quieter operation.