This collection is the Furnaces child underall Lennox equipment. Whole-home ducted gas heat lives here. When the job also needs cooling outdoors or an indoor section, jump the sibling rooms instead of leaving the brand tree:

• Lennox air conditioners— cooling-only outdoor condensers
• Lennox heat pumps— cooling plus heating in one outdoor box / dual-fuel path
• Lennox air handlers— indoor electric / hydro paths
• Lennox evaporator coils— coil-only matchups with a furnace

Came in from the main Lennox nav? Stay on this aisle to shortlist aLennox gas furnacethen use the siblings when matchups call for them.

Lennox’s three residential tiers show up in the filters on this aisle. Start with series and BTU, then open the product page for the efficiency and staging language on that exact SKU.

Merit seriesin this catalog includes ML180, ML193, and ML196 units titled assingle-stagepaths, plus ML296 titled astwo-stagewithvariable-speedblower language. These are the value-oriented options when you are comparing aLennox furnaceacross common capacities.

Elite seriescovers EL180, EL195, and EL196 (entry staging titles) and EL280 / EL297 titled as multi-stage comfort options. Step up here when you want finer staging and higher efficiency ceilings on the SKUs we show.

Signature collectionappears as SL280 and SL297 families, plus SLP99-classvariable-capacityunits in our export. All SLP99-class SKUs are UNLISTED on the storefront today; SL297 is mostly UNLISTED (one ACTIVE handle). ask when you shortlist before you assume a web cart path for Signature flagships.

Browse examples from this aisle:

• Merit ML196 88,000 BTU
• Merit ML296 88,000 BTU
• Elite EL297 88,000 BTU
• Signature SL297 80,000 BTU

How to filter this aisle

Filter by BTU, efficiency, model family, and width first. Open the product page for published specs and the full title. If two SKUs look identical on paper, we confirm matchups before you buy.

Rated comfort and efficiency are system numbers. Pair the gas furnace with a matched evaporator coil and outdoor air conditioner when cooling is in scope. Some jobs use a heat pump or air handler instead.

• Lennox air conditioners
• Lennox evaporator coils
• Lennox heat pumps
• Lennox air handlers

We confirm compatible combinations before you buy — no invented AHRI pairs on this page.

Cabinet widthin titles here: 14.5", 17.5", 21", and 24.5". Use it as a replacement filter for an existing closet or platform — not a DIY cut list. Confirm clearances with your installer; we can shortlist by width before you buy.

These arenatural gasfurnaces.AFUEon SKUs here spans 80% through ~99%.High-efficiencypicks (roughly 90%+) usually need condensing venting and a condensate drain — confirm scope for the exact SKU before you lock SKUs.

Capacity runs 40,000–120,000 BTU — a catalog fact, not a square-foot stamp. No sq ft chart on this page. Refrigerant does not apply to gas furnaces here.

We can help set a sane starting size before Manual J.

Shortlist furnaces with the filters, or note the BTU, width, or series you already know. We confirm sizing and coil/outdoor matchups before you buy. You complete the purchase online once the SKUs are locked.

Manufacturer coverage depends on the model, registration timing, and install channel. Plan on licensed startup and timely registration. An internet purchase without an authorized install path can put coverage at risk. Ask what applies to the exact SKU when you shortlist — coverage depends on model, registration, and install path.

Plan the full job:

• Gas furnace from this aisle
• Matched evaporator coil and outdoor AC (or heat-pump path) when cooling is in scope
• Venting for the efficiency tier (metal flue vs PVC/condensing) and condensate drain for 90%+ units — installer scopes this
• Gas and electrical reconnection; circuit sized to the nameplate
• Licensed startup and combustion check

Licensed gas-appliance work — no DIY piping or venting steps on this page.

Merit is the value ladder (ML180 / ML193 / ML196; ML296 as the step-up). Elite is mid-tier staging and efficiency (EL180 / EL195 / EL196; EL280 / EL297). Signature is the top tier (SL280 / SL297; SLP99-class). SLP99 is UNLISTED and most SL297 handles are UNLISTED — Ask for live availability.

Start atall Lennox equipmentthen open the sibling rooms forLennox air conditionersLennox heat pumpsLennox air handlersandLennox evaporator coils. This furnace aisle stays the heat box when that is the job.