Some of the Best Gas Furnaces You Can Buy in St. Louis

If you’re looking for a gas furnace replacement in East-Central Missouri, our Dave Lennox Signature Collection gas furnaces are the best option. These products are a couple of the quietest gas furnaces available and are extremely energy efficient.

We’ll start with energy efficiency. Our Dave Lennox Signature Collection gas furnaces feature variable speed motors, which save energy by only working fans at full speed when extreme heat is required. Variable speed motors use two-thirds less energy than single speed motors and can help you save hundreds on yearly utility expenses compared to standard furnaces.

Product specifications for each Dave Lennox Signature Collection gas furnace model are explained below. If you’d like to talk with a Morgner Inc. Air Conditioning & Heating team member about one of our products in East-Central Missouri, call 314-262-4541 or schedule an appointment online.

SLP98V Variable-Capacity Gas Furnace

You’ll love the energy efficiency of this gas furnace. It’s certified by ENERGY STAR® for meeting EPA efficiency standards, and it has received an annual fuel utilization efficiency (AFUE) rating* of 98.2%. These two efficiency ratings will help you receive lower utility bills every year. Discover the SLP98V’s other great 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 runs much like the cruise control system of high-performance automobiles, adjusting on its own as necessary to provide maximum fuel efficiency
  • iComfort®-enabled technology—allows 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 for some of the quietest operation you can find
  • SureLight® ignitor for an efficient performance
  • Insulated blower compartment to keep air 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 energy costs while keeping your home comfortable all winter. Even on the chilliest days, its quiet, two-stage heating will keep temperatures consistent while using as little gas 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 makes 65 percent less nitrogen oxide than standard low-NOx furnaces. Less NOx means cleaner air and plants. This furnace also features:

  • Efficiency rating of up to 80% AFUE2—which can potentially save you more money on utility costs.
  • Ultra-low speed continuous fan adjusts humidity and distributes healthier air.
  • iComfort®-enabled technology—when paired with an iComfort® S30 Ultra Smart Thermostat, learns your family’s schedule and adapts heating for energy savings.
  • SilentComfort™ technology and sound-absorbing insulation delivers quiet operation.
  • Dual-fuel capable—Pair with an electric Lennox® heat pump for top efficiency.
  • SureLight® ignition ensures efficient performance.
  • Insulated blower component retains 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

SL297NV Variable-Speed, Ultra-Low Emissions Gas Furnace

Enjoy energy efficiency that flawlessly adjusts to your daily life with the SL297NV gas furnace. Not only can this furnace help you save on energy bills, it’s an environmentally friendly choice. As the first lowest emission furnace on the market,1 the SL297NV makes 65 percent less nitrogen oxide than standard low-NOx furnaces. You can rest easy knowing your heater is resulting in purer air and stronger plants. Recognized with ENERGY STAR® designation, this furnace has the capability to save you hundreds of dollars annually on utility expenses. It also features:

  • Efficiency rating of up to 97.5% AFUE2—likely keeping more money in your pocket on the account of reduced energy use.
  • Intuitive fan mode that can manage humidity and create purer air.
  • iComfort®-enabled technology, when installed with an iComfort® S30 Ultra Smart Thermostat, adjusts to your family’s schedule for the highest energy savings.
  • SilentComfort™ technology and sound-absorbing insulation means your furnace will run quietly.
  • Dual-fuel capable—Can be used with an electric Lennox® heat pump for top efficiency.
  • SureLight® ignition provides efficient performance.
  • Insulated blower component stops heat loss.
  • Stainless-steel secondary heat exchanger holds on to additional heat, allowing the furnace to achieve better efficiency levels.
  • Lifetime Limited Warranty on the heat exchanger.
  • 10-Year Limited Warranty with product registration.
  • 5-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.
3Covered components may be eligible to receive a 10-year warranty. Online equipment registration at www.lennoxregistration.com is required within 60 days of installation (except in California and Quebec) or the Lennox® base warranty will apply. Applies 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.

SL297NV Variable-Speed, Ultra-Low Emissions Gas Furnace
Efficiency Rating (SEER): up to 97.5
Price Guide: $$$Energy Star badge

SL280NV Variable-Speed, Ultra-Low Emissions Gas Furnace

The SL280NV gas furnace can help decrease your energy costs while keeping your home comfortable all winter. Even on the chilliest days, its quiet, two-stage heating will keep temperatures consistent while using as little gas 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,2 it makes 65 percent less nitrogen oxide than standard low-NOx furnaces. Less NOx means cleaner air and plants. This furnace also features:

  • Efficiency rating of up to 80% AFUE1—which can potentially save you more money on utility costs.
  • Ultra-low speed continuous fan adjusts humidity and distributes healthier air.
  • iComfort®-enabled technology, when paired with an iComfort® S30 Ultra Smart Thermostat, learns your family’s schedule and adapts heating for energy savings.
  • SilentComfort™ technology and sound-absorbing insulation delivers quiet operation.
  • Dual-fuel capable—Pair with an electric Lennox® heat pump for top efficiency.
  • SureLight® ignition ensures efficient performance.
  • Insulated blower component retains 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.
3Covered components may be eligible to receive a 10-year warranty. Online equipment registration at www.lennoxregistration.com is required within 60 days of installation (except in California and Quebec) or the Lennox® base warranty will apply. Applies 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.

SL280NV Variable-Speed, Ultra-Low Emissions Gas Furnace
Price Guide: $$$
Efficiency Rating (SEER): up to 80
Energy Star badge

Morgner Inc. Air Conditioning & Heating in St. Louis is available to help with any of your gas furnace replacement, repair or maintenance needs. Call 314-262-4541 or use our online scheduler to make 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.