Lennox EL297V Gas Furnace – 97% AFUE Two-Stage Variable-Speed
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The Lennox EL297V is an Elite Series two-stage, variable-speed gas furnace rated 97% AFUE and ENERGY STAR® certified. It runs on low fire most of the time for steady, quiet heat, its variable-speed blower improves humidity control with central air, and it is designed to pair with the Lennox S40 smart thermostat. Standard installation by Bison Air is included across Toronto and the GTA.
- ✓ Standard installation included in every price
- ✓ 97% AFUE, ENERGY STAR® certified
- ✓ Two-stage gas valve with a variable-speed blower
- ✓ Limited lifetime heat exchanger (original owner) and 5-year parts (Lennox), 1-year labour (Bison Air)
- ✓ Financing available, with no upfront payment options
📏 Choose Your Furnace Size
| Size | Model | Cabinet width | Blower size | Output (BTU/h) | Add-on cooling |
|---|---|---|---|---|---|
| 45,000 BTU 44,000 actual input |
EL297UH045XV36BK | 17-1/2 in | 3-ton | 43,000 / 28,000 | 2-3 ton |
| 70,000 BTU 66,000 actual input |
EL297UH070XV36BK | 17-1/2 in | 3-ton | 64,000 / 42,000 | 2-3 ton |
| 90,000 BTU 88,000 actual input |
EL297UH090XV36CK | 21 in | 3-ton | 85,000 / 56,000 | 2-3 ton |
| 90,000 BTU 88,000 actual input |
EL297UH090XV48CK | 21 in | 4-ton | 86,000 / 56,000 | 2.5-4 ton |
| 90,000 BTU 88,000 actual input |
EL297UH090XV60CK | 21 in | 5-ton | 86,000 / 56,000 | 3-5 ton |
| 110,000 BTU | EL297UH110XV60CK | 21 in | 5-ton | 107,000 / 70,000 | 3-5 ton |
| 135,000 BTU 132,000 actual input |
EL297UH135XV60DK | 24-1/2 in | 5-ton | 127,000 / 84,000 | 3-5 ton |
Sizes are listed the way the industry sells them (45K, 70K, 90K, 110K, 135K); the actual Lennox input rating is shown under each size. Output shown high / low fire. We size from a heat-loss calculation, not square footage alone, and match the cabinet width and blower to your ductwork and air conditioner.
💡 Current "K" models. The model numbers ending in K are Lennox's current production. They have the same heating ratings as the earlier models and add a control ready for Lennox's refrigerant detection system, used with new R-454B air conditioners and heat pumps.
❄️ Key Features
- ✓ Two-stage heating (65% and 100%): low fire for mild days, high fire for the coldest nights
- ✓ Variable-speed blower for even airflow and better humidity control with air conditioning
- ✓ Fully insulated cabinet for quiet operation
- ✓ Ultra-low continuous fan for steady circulation and filtration
- ✓ Designed to pair with the Lennox S40 smart thermostat; also works with standard thermostats
- ✓ Duralok Plus heat exchanger with stainless steel secondary coil
- ✓ Dual-fuel capable with a heat pump
📋 Technical Specifications
| EL297UH… | 045XV36BK | 070XV36BK | 090XV36CK | 090XV48CK | 090XV60CK | 110XV60CK | 135XV60DK |
|---|---|---|---|---|---|---|---|
| Input BTU/h high / low | 44,000 / 29,000 | 66,000 / 43,000 | 88,000 / 57,000 | 88,000 / 57,000 | 88,000 / 57,000 | 110,000 / 72,000 | 132,000 / 86,000 |
| Output BTU/h high / low | 43,000 / 28,000 | 64,000 / 42,000 | 85,000 / 56,000 | 86,000 / 56,000 | 86,000 / 56,000 | 107,000 / 70,000 | 127,000 / 84,000 |
| AFUE | 97% | 97% | 97% | 97% | 97% | 97% | 97% |
| Cabinet width (in) | 17-1/2 | 17-1/2 | 21 | 21 | 21 | 21 | 24-1/2 |
| Add-on cooling (tons) | 2-3 | 2-3 | 2-3 | 2.5-4 | 3-5 | 3-5 | 3-5 |
| Airflow range (CFM) | 465-1370 | 490-1365 | 520-1360 | 680-1770 | 840-2195 | 850-2125 | 950-2250 |
| Blower motor (hp) | 1/2 | 1/2 | 1/2 | 3/4 | 1 | 1 | 1 |
| Max overcurrent protection (A) | 15 | 15 | 15 | 15 | 20 | 20 | 20 |
| Temperature rise (°F) | 35-65 high / 20-50 low | 50-80 high / 25-55 low | 60-90 high / 30-60 low | 45-75 high / 30-60 low | 40-70 high / 25-55 low | 45-75 high / 35-65 low | 55-85 high / 40-70 low |
| Shipping weight (lb) | 126 | 134 | 151 | 157 | 160 | 174 | 188 |
All models: 115 V, 1 ph; upflow or horizontal (left or right) installation; 2 in. PVC venting standard; filter field-supplied. Source: Lennox product specifications (see documents).
Documents: EL297UHV(K) Product Specifications (10/2026) · EL297UHVK Installation Instructions · Lennox EL297V product page
🔧 What Standard Installation Includes
- ✓ New furnace set in place and connected to your existing ductwork
- ✓ Gas connection to the existing gas supply at the furnace
- ✓ PVC venting and condensate drain connections
- ✓ Electrical connection to the existing furnace circuit
- ✓ Thermostat connected and tested
- ✓ Startup, combustion check and commissioning by TSSA-certified gas technicians
- ✓ 1-year labour warranty and warranty registration
Quoted as extras when needed: venting changes or new vent runs, gas line changes, plenum or ductwork modifications, a condensate pump, and electrical upgrades. We confirm venting, gas supply and ductwork before the job, and every extra is quoted in writing before work starts.
🛡️ Warranty
- ✓ Heat exchanger: limited lifetime for the original owner (20 years for later owners) (Lennox, residential)
- ✓ Parts: 5 years (Lennox basic limited warranty, no registration needed)
- ✓ Lennox extended parts warranty: available when the owner registers online within 60 days of installation (Lennox terms apply)
- ✓ Labour: 1 year from Bison Air, included
- ✓ Optional 10-year labour warranty: $700
Lennox warranty terms: Lennox Basic Limited Warranty · Lennox Extended Limited Warranty.
💰 Financing
Pairing the furnace with a heat pump in a dual-fuel system can cut gas use and may qualify for heat pump rebates; ask us what applies to your home.
Prefer monthly payments? HVAC financing through Financeit: pre-qualify in seconds without affecting your credit score.
🏆 Why Choose Bison Air
- ✓ Lennox equipment supplied and installed by Bison Air
- ✓ TSSA Certified HVAC Contractor
- ✓ Fully Licensed & Insured HVAC Technicians
- ✓ Registered HRSP Heat Pump Rebate Contractor
- ✓ Standard Installation Included – No Hidden Fees
- ✓ Professional System Design & Equipment Selection
- ✓ Clean, Organized Installations
- ✓ 1-year labour warranty on every installation
- ✓ Serving Toronto, York Region, Peel Region, Barrie & all GTA Communities
🔗 Related
- ✓ Lennox ML196E Furnace
- ✓ Lennox ML297V Furnace
- ✓ Lennox EL196E Furnace
- ✓ Lennox EL15KC1 Central AC
- ✓ HVAC Installation
- ✓ Heat Pump Installation
- ✓ HVAC Financing
📍 Areas We Serve
Lennox EL297V furnace installation throughout Toronto and the GTA:
Toronto · North York · Scarborough · Etobicoke · Vaughan · Markham · Richmond Hill · Aurora · Newmarket · East Gwillimbury · King City · Stouffville · Mississauga · Brampton · Oakville · Milton · Burlington · Barrie · Innisfil · Orillia · Bradford · Keswick · Ajax · Pickering · Whitby · Oshawa · Orangeville
🔥 Get Your Furnace Quote
Tell us about your home and your current furnace. We will confirm the right size and venting and give you a clear written price.
or fill out our form for a free consultation · Serving Toronto & the GTA
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