SL280V Variable-Speed Gas Furnace

The SL280V is designed to deliver cozy and reliable warmth, while keeping operating sounds at a minimum. It’s also engineered to perform at peak efficiency, so you can enjoy substantial energy savings compared to an older system.

Here are some of the top features of the SL280V:

Efficiency rating of 80% AFUE can save you hundreds of dollars each year** compared to older furnaces.

Variable speed technology delivers greater humidity control and consistent airflow for improved comfort and indoor air quality.

SilentComfort™ technology delivers the ultimate in quiet, consistent heating.

Ultra-low continuous fan speed provides a quiet, constant flow of air and optimizes indoor air quality accessories.

Improved cooling SEER efficiency is achieved by matching the SL280V with a Lennox air conditioner or heat pump.***

  • Efficiency rating of 80% AFUE
  • The quietest furnace in its class
  • SilentComfort™ technology
  • Two-stage, variable speed operation
  • Dual-fuel capability
  • Enhanced humidity control
  • 20-Year Limited Warranty on heat exchanger, 10-Year Limited Warranty on covered parts



  • AHRI Certified
  • CSA Design Certified
  • DualFuel


  • 20-Year Limited Warranty on heat exchanger
  • 10-Year Limited Warranty on covered components

*Based on sound pressure levels during steady-state, high-fire operation of Lennox SL280UHV070V36A and leading competitive units at mid-point temperature rise and minimum external static pressure when set up per Section 4.5.3 of AHRI 260-2001. **This chart depicts potential energy savings you can expect from the SL280V furnace, versus older furnaces with lower efficiency ratings. Criteria used in this example are 2,000 full-load heating hours, with a 60,000 Btuh heating design load and $1.368 ccf for gas. Your actual savings may vary, depending on the weather patterns in your local area, local fuel rates and your individual lifestyle.
***Proper sizing and installation of equipment is critical to achieve optimal performance. Verify actual system efficiency at href=””>
†iComfort Wi-Fi® Touchscreen thermostat must be installed with an iComfort-enabled indoor unit for maximum performance.