The 3Dimension furnace utilizes three new technologies that when combined deliver a high level of comfort, exceptional reliability, and excellent efficiency. If you want a premier heating product but also want an economical one, the 3Dimension furnace is for you. The 3Dimension two-stage furnace is smart. It recognizes the difference between mild days and really cold days, and uses only a portion of its capacity necessary to keep you comfortable. Standard furnaces have one level of heat: high. That's fine on really cold days, but on milder days it's more than is needed. The 3Dimension furnace features two levels of heat. Most of the time it operates in the first stage, or low heat, for greater efficiency, but on cold days, it moves to the high-heat second stage to meet the demand.

The 3Dimension variable-speed furnace is efficient. The motor automatically adjusts to meet the changing needs of your home, while always delivering the proper amount of air. Add to that the reliability of the SureLight electronic ignition, and you can understand why the 3Dimension furnace offers a whole new "dimension" of comfort. Just what you'd expect from the company you trust.

By combining two-stage heating with variable-speed technology, Lennox has created a high-efficiency furnace that offers both comfort and value. Two-stage heating reduces temperature swings within the home maintaining a consistent and comfortable preferred temperature. The variable-speed indoor blower adds to the comfort and efficiency by delivering more consistent comfort throughout your home. This consistent airflow also enables the air filter to trap more pollutants, and controls the humidity more effectively for better indoor air quality, so you'll breathe easier all winter long. And the new SureLight ignition system utilizes the latest technology and most rugged materials available to provide reliable performance. When utilized in a zoned heating and cooling configuration, the 3Dimension gas furnace can offer the kind of comfort you haven't known since your pajamas had feet.

Quality Components

1. DuralokPlus Heat Exchanger - High quality patented aluminized steel primary heat exchanger and stainless steel secondary heat exchanger provides high-efficiency operation and resists corrosion.
2. Reliable Sealed Combustion - Uses 100% outdoor air, reducing the likelihood of heat exchanger corrosion from chemicals found in indoor air. And no open flame means quieter operation.
3. Two-Speed Combustion Air Blower Motor - Automatically adjusts to maintain consistent airflow, and reduces temperature fluctuation for greater comfort and improved air filtration.
4. Intelligent Two-Stage Electronic Controls - Microprocessor monitors and adjusts unit to enhance performance, efficiency and safety.

5. SureLight Electronic Ignition System - Sturdy igniter design and patented "adaptive technology" control module adjust to ever-changing conditions for safe, reliable operation by providing just enough energy to light the burners without overheating the igniter, thereby extending igniter life.

6. SureLight Igniter - Made of Silicon Nitride, a new rugged material that is much stronger than other hot surface igniters.

7. Variable-Speed Blower - Automatically adjusts to achieve the proper amount of airflow in the home.
8. Variable-Speed Electronic Control - Sophisticated electronic control module that controls the indoor blower.

Efficient Design

9. Quiet Operation - Insulated blower compartment and cabinet, combined with super quiet blowers, help mute sound levels. Two-stage heating greatly reduces noise.
10. Lower Emissions - Unique design significantly lowers emissions of nitrogen oxides into the atmosphere, and meets California's stringent emission regulations.

Looks Good Year After Year

11. Durable Steel Cabinet - Rugged and well-insulated cabinet is protected with a durable, high-quality paint process that keeps the cabinet looking good.

SureLight ELECTRONIC Ignition

Go with a Sure Thing
When it comes to safety and reliability, second-best is simply not good enough. That's why Lennox has introduced a new electronic ignition system that is the safest, surest, most reliable and most intelligent hot surface ignition system available today. The SureLight igniter is much stronger and less fragile than other versions of hot surface igniters. The SureLight system also features a patented "adaptive technology" control module that determines just how much energy is needed to light the burners. Strong. Smart. Safe. Reliable. That's Lennox for you.

Indoor Air Quality

Enhanced Air Filtration - Consistent airflow improves air filtration, reducing pollutants in your home. Air filter design allows easy access to keep furnace in proper operating condition for years to come.
Continuous Low-Speed Fan Option - When there is a need for continuous air circulation, the furnace operates on a dedicated low speed providing more efficient, comfortable airflow and improving indoor air quality.
Humidity Control - Variable-speed blower motor when used with a humidity control device provides enhanced dehumidification.

Warranties

We build according to internationally recognized ISO 9002 standards.And, we stand behind our products with some of the best warranties in the industry. The 3Dimension gas furnace is backed by a 20-year limited warranty* on the heat exchanger. All other covered components carry a 5-year limited warranty.* That's one more reason to trust Lennox.

*Residential applications only.

Efficiency

The 3Dimension gas furnace offers outstanding energy efficiency. With efficiency ratings up to 94.2%, the 3Dimension furnace can reduce your energy bills when compared to older furnaces. The 3Dimension furnace offers more comfort for every energy dollar you spend, and the additional monthly savings means you'll be comfortable with the return on your investment for years to come.

*94.2%efficient 3Dimension gas furnace vs. 55% and 65% AFUE units. This chart compares the average 3-year savings you an expect from the Dimension furnace versus furnaces with lower efficiency ratings. Costs are based on industry averages for a typical 3-bedroom house in a city with 2,000 heating hours with a 100,000 BTU load, and $.63ccf for gas. Your actual savings will vary depending on the weather, local fuel rates and your lifestyle.

TWO-STAGE HEATING The Smart Way to Heat Your Home A furnace with intelligence? You bet. With its two-stage technology, the 3Dimension furnace adjusts its output to meet demand. No need to operate at full capacity when only a fraction is needed. But when the thermometer drops and full capacity is needed, the 3Dimension furnace is ready. Now that's smart.

VARIABLE-SPEED TECHNOLOGY

Take Control of Your Comfort and Your Energy Bills
Variable-speed motors can actually save you money on your energy bill because they consume less electricity than standard motors. Also, having a variable-speed furnace as part of your home's comfort system means you will gain air conditioning efficiency. It just makes good sense - dollars and cents that is! A variable-speed motor combined with a humidistat also helps you control humidity in your home, giving you improved air quality and comfort. Variable-speed motors are also well suited for zoning applications. Customizing your comfort while controlling your energy, that's what it's about.

ENERGY STAR Certification - Lennox is proud to display the Energy Star logo for this product which means it meets the EPA's standards, by using less energy which reduces pollution.As an EnergyStar Partner, Lennox Industries Inc. has determined that this product meets the EnergyStar guidelines for energy efficiency.