Some of the Best Gas Furnaces You Can Buy in Saint Peters

If you’re searching for a gas furnace replacement in O'fallon, our Dave Lennox Signature Collection gas furnaces are an excellent choice. These systems are two of the quietest gas furnaces available and are highly energy efficient.

Let’s start with energy efficiency. Our Dave Lennox Signature Collection gas furnaces include variable speed motors, which conserve energy by only working fans at full speed when an extreme change in heat is required. Variable speed motors use two-thirds less energy than single speed motors and can help you save hundreds on your annual utility bills compared to standard furnaces.

Product details for each Dave Lennox Signature Collection gas furnace model are provided below. If you want to talk with a C-N-O Comfort Zone staff member about one of our products in O'fallon, call 636-255-8997 or set up an appointment online.

SLP98V Variable-Capacity Gas Furnace

You’ll love the energy efficiency of this gas furnace. It’s ENERGY STAR® qualified for meeting EPA efficiency standards, and it has received an annual fuel utilization efficiency (AFUE) rating* of 98.2%. Combined, these two ratings help you save hundreds annually on your utility expenses. Discover the SLP98V’s other outstanding features, including:

  • Efficiency rating of up to 98.2% AFUE*—can save you money on your utility expenses
  • ENERGY STAR® qualified—meets or exceeds EPA guidelines for energy efficiency
  • Variable-capacity operation operates much like the cruise control system of high-performance automobiles, adjusting on its own as necessary to provide maximum fuel efficiency
  • iComfort®-enabled technology—enables the furnace, when installed with the easy-to-use programmable iComfort Wi-Fi® thermostat, to offer even better performance and efficiency
  • PreciseComfort™ technology provides superior control
  • SilentComfort technology helps the system run quietly
  • SureLight® ignitor for an efficient performance
  • Insulated blower compartment to keep heat in and reduce heat loss
  • 10-Year Limited Warranty on parts and controls
  • Limited Lifetime Warranty on heat exchanger
SLP98V Variable-Capacity Gas Furnace
Efficiency Rating (SEER): up to 98.7
Price Guide: $$$Energy Star badge

SL280NV Variable Speed, Ultra-Low Emissions Gas Furnace

The SL280NV gas furnace can help decrease your utility costs while keeping your home cozy all winter. Even on the coldest days, its quiet, two-stage heating will keep temperatures regular while using as little energy as possible. You can also breathe easy knowing this furnace contributes to a better environment—inside and outside. As the first lowest emission furnace on the market,1 it produces 65 percent less nitrogen oxide than standard low-NOx furnaces. Less NOx means healthier air and plants. This furnace also features:

  • Efficiency rating of up to 80% AFUE2—which can likely save you more money on heating costs.
  • Ultra-low speed continuous fan regulates humidity and distributes healthier air.
  • iComfort®-enabled technology—when paired with an iComfort® S30 Ultra Smart Thermostat, becomes familiar with your family’s schedule and adjusts heating for energy savings.
  • SilentComfort™ technology and sound-absorbing insulation provides quiet heating.
  • Dual-fuel capable—Install with an electric Lennox® heat pump for highest efficiency.
  • SureLight® ignition ensures efficient performance.
  • Insulated blower component holds on to more heat.
  • 20-Year Limited Warranty on the heat exchanger.
  • 10-Year Limited Warranty on remaining covered components.3

1Lennox® SL97UH40NV36B, EL195UH100NE60C, SL280UH100NV60C and EL180UH040NE36A units are the first commercially available, natural Gas-Fired Fan-type Central Furnaces to meet an NOx emission limit of 14 nanograms per Joule (ng/J).
2Annual Fuel Utilization Efficiency (AFUE) measures how efficiently an appliance converts fuel into heat over the course of a year.
3Applies to residential applications only. See actual warranty certificate for details.

Note: Due to Lennox’s ongoing commitment to quality, specifications and ratings are subject to change without notice.

SL280V Variable Speed Gas Furnace
Efficiency Rating (SEER): up to 80
Price Guide: $$$Energy Star badge

C-N-O Comfort Zone in Saint Peters is eager to help with any of your gas furnace replacement, repair or maintenance needs. Call 636-255-8997 or use our online scheduler to set up your appointment.


* Annual Fuel Utilization Efficiency (AFUE) measures how efficient the appliance is in converting its fuel’s energy into heat over the course of a year.