Premium brand · Est. 1895
Lennox Furnaces
Lennox is widely regarded as the efficiency leader, home to some of the highest-AFUE furnaces on the market. Its premium SLP and Signature lines pair variable-speed comfort with industry-topping efficiency.
Lennox at a glance
Best for
Maximum efficiency & premium comfort
Warranty
Lifetime heat exchanger + 10-yr parts (registered)
Headquarters
Richardson, Texas
Founded
1895 (USA)
Lennox pros & cons
Pros
- Industry-leading AFUE (up to 99%)
- Excellent variable-speed comfort
- Strong dealer network nationwide
Cons
- Premium pricing
- Proprietary parts can cost more
Lennox furnace series
Lennox furnace models
SLP99V
Modulating · Lifetime heat exchanger
99%
AFUE
58
dB
4.8
Rating
Installed
$9,300 – $11,100
SL280V
Two Stage · Lifetime heat exchanger
80%
AFUE
62
dB
4.4
Rating
Installed
$7,300 – $9,100
EL296V
Variable Speed · 20 yr heat exchanger
96%
AFUE
64
dB
4.7
Rating
Installed
$6,900 – $8,700
ML196E
Single Stage · 20 yr heat exchanger
96%
AFUE
69
dB
4.2
Rating
Installed
$5,600 – $7,400
SLP98V Variable-Speed
Variable Speed · Lifetime heat exchanger
98%
AFUE
59
dB
4.6
Rating
Installed
$8,200 – $10,000
EL180XPE Two-Stage
Two Stage · 20 yr heat exchanger
80%
AFUE
65
dB
4.4
Rating
Installed
$6,000 – $7,800
ML180E Single-Stage
Single Stage · 20 yr heat exchanger
80%
AFUE
71
dB
4.2
Rating
Installed
$4,900 – $6,700
SLP99V XC Dual-Fuel Package
Modulating · Lifetime heat exchanger
99%
AFUE
57
dB
4.8
Rating
Installed
$10,900 – $12,700
Lennox reviews
Quiet and efficient — bills dropped
"Replaced our 20-year-old furnace and the difference is night and day. The house heats evenly and it's noticeably quieter. Our gas bill dropped about 25% over the winter."
— Sarah M., Toronto · 2025-01-01
Smooth install, great comfort
"The installer walked us through the financing and rebates, handled all the paperwork, and had us up and running in a day. Couldn't be happier with the comfort."
— David R., Calgary · 2025-02-08
Exactly what we needed
"We went with a two-stage model on the recommendation here and it holds temperature perfectly. No more big swings between the thermostat cycling on and off."
— Emily G., Mississauga · 2025-03-15
Warm house, lower gas bill
"Got three quotes through the marketplace and picked the mid-tier option. Install was clean, the crew was respectful of our home, and everything works great."
— Marc M., Winnipeg · 2025-04-22