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| ML196 | EL297V | SLP99V | |
| -Gas Efficiency | up to 96% | up to 97% | up to 99% |
-Dual-fuel capability, can be combined with an electric heat pump to enhance comfort and fuel efficiency by alternating between electric and gas heat, optimizing energy use and minimizing heating costs. |  | | |
-Stainless steel secondary heat exchanger, allows the furnace to reach high efficiency levels by capturing additional heat | | | |
-Duralok Plus® heat exchanger, made of patented ArmorTuf™ aluminized steel to ensure high reliability and efficiency. | | | |
-SureLight® silicon nitride ignitor is constructed for long product life and reliable operation. | | | |
-Variable speed blower motor, provides a quiet, consistent flow of air for enhanced comfort, efficiency and humidity control. | | | |
-Multi-stage, gas valve, works with the variable speed motor to match furnace output to household heating needs. | Single-Stage | 2-Stage | -Variable-capacity operation, varying output from 35% to 100% |
-Fully insulated cabinet, patented noise-reducing construction further minimizes operating sound to an industry-leading low level. | | | |
-This product has been designated as one of the Most Efficient ENERGY STAR qualified products in 2014. | |
