Lennox® 3Dimension

Efficiency Rating
AFUE up to 94.2%

D
uralokPlus® Primary Heat Exchanger
The Heart of the 3Dimension furnace operates by burning the fuel inside the exchanger that warms the air traveling across the outside of the heat exchanger. Made of high-quality patented ArmorTuf™ alumanized steel, its patented crimped seam is a Lennox® exclusive feature designed to provide longer life and safer operations.

Secondary Heat Exchanger
Allows the furnace to reach higher efficiency levels by capturing every last bit of available heat and is made of rugged 29-4C stainless steel for corrosion resistance.

I
n-Shot Burners

One-Piece burner, designed and built by Lennox® for quiet and reliable operation.

Insulated Blower Compartment and
Cabinet
Reduces noise for quiet operation.

Two-Stage Control Board
Control Center for two-stage operation

Two-Stage Gas Valve
Adjusts amount of gas to accommodate two stages of operation.


Two-Speed Combustion Air Blower

Adjusts amount of air delivered to accommodate two stages of operation.


SureLight™ Control Board
Patented adaptive technology adjusts to ever changing conditions for reliable operation.


Variable Speed Control Board

Control center for variable-speed operation.

Variable Speed Blower Motor/Indoor
Air Blower
Maintains the required airflow for comfort and is capable of accommodation zoning or humidity control requirements.