A Lennox heat pump costs $5,800 to $14,200 installed in 2026, with the series you choose driving most of that spread and tonnage driving the rest. A Merit single-stage unit sits at the bottom, an Elite variable-capacity unit runs roughly $7,400 to $11,800, and the Signature SL22KLV reaches the top. The most common project, a 3-ton Elite heat pump on existing ductwork, lands between $8,200 and $10,500.
TL;DR: Lennox heat pumps run $5,800 to $14,200 installed. Merit is $5,800 to $9,200, Elite is $7,400 to $11,800, and the Signature SL22KLV is $11,200 to $14,200. The SL22KLV is the cold-climate model, rated to minus 20 degrees Fahrenheit at 10.5 HSPF2. Every current Lennox heat pump now uses R-454B refrigerant, and the old XP and XPV model names are retired. The federal 25C tax credit expired for equipment placed in service after December 31, 2025, so a Lennox manufacturer rebate of up to $1,550 is the live incentive. Get a personalized range from our free HVAC cost estimator.
How Much Does a Lennox Heat Pump Cost Installed?
Lennox heat pump replacement costs $5,800 to $14,200 installed in 2026. The single biggest variable is the series, because Lennox builds three distinct product lines that differ in compressor technology rather than just trim level. The table below shows installed ranges for a typical replacement on existing ductwork.
| Series | Compressor Type | SEER2 Range | HSPF2 Range | Installed Cost |
|---|---|---|---|---|
| Merit | Single-stage, two-stage, or slim variable | up to 17.5 | 8.2–9.6 | $5,800–$9,200 |
| Elite | Single-stage or variable-capacity | up to 21.0 | up to 10.0 | $7,400–$11,800 |
| Signature | Variable-speed with refrigerant injection | up to 21.1 | 10.5 | $11,200–$14,200 |
Those figures include the outdoor unit, a matched indoor coil or air handler, standard labor, refrigerant line evacuation, a basic thermostat, and startup. They exclude several things that show up on real quotes and can move the total by thousands.
- Ductwork modification or replacement: add $2,000 to $5,000 if the existing runs are undersized or leaking.
- Electrical service work: a new circuit, disconnect, or panel upgrade for backup heat strips can add $400 to $2,500.
- Permits and inspection: commonly $150 to $500 depending on the jurisdiction.
- Accessories: a communicating thermostat, zoning, or air purification are priced separately and are usually where a quote quietly grows.
What Does a Lennox Heat Pump Cost by Tonnage?
Tonnage adds roughly $400 to $700 per half ton across the Lennox lineup. The 4-to-5 ton row is the exception, because it covers a full ton in one step and works out to $250 to $400 per half ton. A 2-ton system starts near $5,800 in the Merit line, while a 5-ton Signature system approaches $14,200. The low column below reflects a Merit single-stage unit and the high column reflects the Signature SL22KLV at the same capacity.
| System Size | Typical Home Size | Merit (Low) | Elite (Mid) | Signature (High) |
|---|---|---|---|---|
| 2 ton | 900–1,200 sq ft | $5,800 | $7,400 | $11,200 |
| 2.5 ton | 1,200–1,500 sq ft | $6,200 | $7,800 | $11,900 |
| 3 ton | 1,500–1,800 sq ft | $6,700 | $8,200 | $12,600 |
| 3.5 ton | 1,800–2,100 sq ft | $7,200 | $8,900 | $13,200 |
| 4 ton | 2,100–2,400 sq ft | $7,800 | $9,600 | $13,700 |
| 5 ton | 2,400–3,000 sq ft | $8,400 | $10,400 | $14,200 |
The square footage column is a rough orientation only. Do not let a contractor size your system from floor area alone, and be skeptical of anyone who quotes a tonnage before measuring anything. Insulation levels, window area and orientation, ceiling height, air sealing, and climate zone all change the answer. A proper Manual J load calculation is the only defensible basis, and an oversized heat pump short-cycles, dehumidifies poorly, and wears out early while costing you more upfront.
Lennox Heat Pump Models — Merit, Elite, and Signature Compared
Lennox currently sells eight residential heat pump models. Every one of them uses R-454B refrigerant, and the model names changed with that transition. If you are reading a pricing article that quotes the ML17XP1, EL18XPV, XP25, or SL25XPV, you are reading about the previous R-410A generation. Those units are no longer the current catalog. Here is what Lennox actually sells today, with specifications published on lennox.com and verified July 31, 2026.
| Model | Series | SEER2 | HSPF2 | Compressor | Sound | Installed Cost |
|---|---|---|---|---|---|---|
| ML14KP1 | Merit | Not published | Not published | Single-stage | Not published | $5,800–$8,400 |
| ML16KP2 | Merit | 17.5 | 8.2 | Two-stage | 74 dB | $6,300–$8,700 |
| ML15KSPV | Merit | up to 17.5 | up to 9.6 | Variable (slim) | 57 dB | $6,900–$9,200 |
| EL16KP1 | Elite | Not published | Not published | Single-stage | 71 dB | $7,400–$9,600 |
| EL18KSLV | Elite | up to 19.0 | up to 10.0 | Variable (slim) | 54 dB | $8,300–$11,000 |
| EL19KPV | Elite | up to 19.5 | up to 9.0 | Variable-capacity | 61 dB | $8,600–$11,300 |
| EL21KLV | Elite | up to 21.0 | 10.0 | Variable-capacity | 60 dB | $9,400–$11,800 |
| SL22KLV | Signature | up to 21.1 | 10.5 | Variable-speed with ERI | 58 dB | $11,200–$14,200 |
Two patterns are worth noticing. First, the slim-cabinet variable models (ML15KSPV and EL18KSLV) are the quietest units in their series at 57 and 54 decibels, which matters if the outdoor unit sits under a bedroom window. The EL18KSLV is quieter than the Signature SL22KLV. Second, HSPF2 does not climb in lockstep with SEER2. The EL19KPV has a higher SEER2 than the EL18KSLV but a lower HSPF2, so in a heating-dominated climate the cheaper-rated unit is the better heater. Lennox lists all eight as ENERGY STAR qualified, though it does not publish SEER2 or HSPF2 figures for the two base single-stage models, so ask your dealer for the AHRI-certified rating on the ML14KP1 or EL16KP1 before comparing them on efficiency. For how Lennox prices its air conditioners and furnaces, see our Lennox whole-system replacement cost guide, which covers the AC and furnace model tables this page does not repeat.
How Well Do Lennox Heat Pumps Work in Cold Weather?
The Signature SL22KLV is rated by Lennox to operate down to minus 20 degrees Fahrenheit and is certified ENERGY STAR Most Efficient Cold Climate 2025. It reaches that with a variable-speed compressor and Electronic Refrigerant Injection, which keeps capacity up as outdoor temperatures fall instead of letting it collapse the way a single-stage unit does. Its HSPF2 of 10.5 is the highest in the Lennox lineup, and HSPF2 is the number that predicts your winter bills.
The Elite EL21KLV is the step-down cold-climate choice at up to 21 SEER2 and 10.0 HSPF2, and it saves roughly $1,800 to $2,400 against the SL22KLV at the same capacity. Below the KLV models, the Merit and lower Elite units are mild-climate equipment. They will heat, but they lean on backup heat sooner and harder.
Backup heat is a real line item, not a footnote, and it is where cold-climate quotes diverge. You have two paths:
- Electric resistance strips in the air handler: cheapest to install at roughly $320 to $950 for the heat kit, plus any electrical work. They are also the most expensive way to make heat, so every hour they run costs you.
- Dual fuel with a gas furnace: the heat pump handles mild weather and the furnace takes over below a switchover point you set. Adds $3,000 to $6,000 for the furnace and controls, and pays back fastest where winters are long and gas is cheap.
If you are still weighing whether a heat pump makes sense at all against a conventional split system, our heat pump vs central air cost comparison works through the operating-cost math.
How Does the Air Handler or Furnace Pairing Change the Price?
The outdoor unit is only part of what you are buying. A heat pump needs a matched indoor component, and that choice can swing the installed total by $5,000. This is the single most common reason two Lennox quotes for the same outdoor model come back thousands of dollars apart.
| Indoor Pairing | What It Is | Added Cost | Best For |
|---|---|---|---|
| Coil on existing furnace | New evaporator coil only, furnace stays | $800–$1,600 | Furnace under 10 years old and in good condition |
| New air handler | All-electric indoor unit with blower and coil | $1,800–$3,500 | Homes with no gas service |
| New gas furnace (dual fuel) | Furnace plus coil plus switchover control | $3,000–$6,000 | Cold climates with affordable natural gas |
Matching matters beyond the price. A variable-capacity outdoor unit paired with a fixed-speed indoor blower cannot deliver its rated SEER2 or HSPF2, because the published rating is measured on a specific certified combination. If a contractor quotes you an EL21KLV against a basic single-speed air handler to hit a budget, you are paying Elite money for mid-tier performance. Ask for the AHRI reference number for the exact combination on the quote. It takes one line on the proposal and it is the cleanest proof that the rating you are being sold is the rating you will get.
What Rebates and Tax Credits Apply to a Lennox Heat Pump in 2026?
The federal Section 25C Energy Efficient Home Improvement Credit is gone for 2026 installations. The IRS states the credit applies to qualifying property placed in service on or after January 1, 2023 and before December 31, 2025, and ENERGY STAR describes it as effective for products purchased and installed between January 1, 2023 and December 31, 2025. A heat pump you install this year does not qualify for the former $2,000 credit, and the CEE tier requirement that governed eligibility no longer has a credit attached to it. Both sources were verified July 31, 2026.
This is worth stating plainly because a number of HVAC pricing pages still advertise a $2,000 federal credit for 2026 heat pump installs. If a contractor builds that credit into your payback math, the payback math is wrong. Our 2026 heat pump tax credit guide tracks the current federal and state picture.
What is live right now is a manufacturer rebate. Lennox is running a national consumer promotion worth up to $1,300, combinable with a $250 250th Anniversary Special for up to $1,550 per Lennox Ultimate Comfort System that includes an Elite or Dave Lennox Signature Collection heat pump. The terms are specific and time-boxed:
- Purchase window: July 6 through August 14, 2026, from a participating Lennox dealer.
- Installation deadline: August 21, 2026.
- Claim deadline: September 20, 2026 at 11:59:59 p.m. ET, submitted with the dealer invoice listing all models and serial numbers.
- Anniversary-eligible heat pumps: SL22KLV, EL21KLV, EL19KPV, EL16KP1, and EL18KSLV.
- Payment form: a Lennox Prepaid Mastercard, not a discount on the invoice, and prepaid cards carry expiration dates.
Two practical notes. The rebate is paid after the fact, so you still finance the full installed price at closing. And because it is structured around the Ultimate Comfort System bundle, a dealer may steer you toward accessories you did not want in order to qualify. Price the system you actually need first, then check whether it clears the rebate threshold. Utility and state programs stack on top and are now the larger opportunity in many territories, so check your utility’s current offer before you sign.
How Does Lennox Heat Pump Pricing Compare to Trane and Carrier?
Lennox lands between Trane’s entry and premium bands and well inside Carrier’s published range. The comparison below uses each manufacturer’s own published pricing rather than third-party aggregate estimates, which is the fairest way to read it since all three price through protected dealer networks.
| Brand | Entry Tier | Mid Tier | Premium Tier | Source |
|---|---|---|---|---|
| Lennox | $5,800–$9,200 (Merit) | $7,400–$11,800 (Elite) | $11,200–$14,200 (Signature) | Site pricing model |
| Trane | $8,313–$10,289 (Choice) | $9,921–$12,648 (Priority) | $12,778–$15,608 (Premier) | Trane pricing guide |
| Carrier | $6,000–$25,000 across all heat pump types | Carrier 2026 price guide | ||
Lennox undercuts Trane at every tier on published figures, most sharply at the entry level where a Merit unit can be $2,500 below a Trane Choice. Trane also publishes a separate cold-climate band of $7,983 to $17,012, which is the closest apples-to-apples comparison for the Lennox SL22KLV. Carrier’s published range of $6,000 to $25,000 spans ducted, ductless, and geothermal in one number and is too broad to plan against.
Treat all three as roughly interchangeable on equipment quality at matching tiers. The installing contractor is the larger variable in how the system performs over 15 years. For the full field including budget brands, see our heat pump replacement cost by brand guide, which compares Goodman, Rheem, Mitsubishi, and Daikin alongside the premium three.
What Warranty Comes With a Lennox Heat Pump?
Lennox splits coverage into a Basic Limited Warranty that applies automatically and an Extended Limited Warranty that requires registration within 60 days of installation. The gap between them is large enough that failing to register is one of the more expensive clerical mistakes a homeowner can make.
| Series | Unregistered Components | Unregistered Compressor | Registered Parts | Labor Trade-Down Option |
|---|---|---|---|---|
| Merit | 5 years | 5 years | 10 years | 7 years parts + 3 years labor |
| Elite | 5 years | 10 years | 10 years | 7 years parts + 3 years labor |
| Signature | 10 years | 10 years | 12 years | 10 years parts + 3 years labor |
Three details that matter on a real install. Homeowners in California, Florida, Georgia, and Quebec receive the extended coverage automatically without registering, a state-law consequence rather than a Lennox favor. The labor trade-down is genuinely worth considering, because a compressor swap in year five costs far more in labor than in parts, and three years of covered labor front-loads protection during the period when installation defects surface. And despite what many third-party sites repeat, Lennox does not publish a lifetime compressor warranty on its current heat pumps. The published Signature terms are 10 years compressor unregistered and 12 years parts registered. Verify the coverage on your own proposal against Lennox’s published warranty page before signing.
Why Do Lennox Quotes Vary So Much Between Dealers?
Lennox sells exclusively through an authorized dealer network and does not publish equipment prices. There is no list price to anchor against, no online retail channel, and no way to price-check a model number the way you can with an open-distribution brand. The predictable result is a wide quote spread for identical equipment, commonly 25 to 40 percent between the low and high bid in the same metro.
The 2026 refrigerant transition widened it further. Every current Lennox heat pump uses R-454B, an A2L refrigerant adopted under the EPA AIM Act phase-down of high global warming potential HFCs. Servicing A2L equipment requires rated tools, updated leak detection, and trained technicians, and contractors who invested in that changeover are pricing to recover it. Contractors still clearing R-410A inventory may quote lower on equipment that is now end-of-line. That gap is temporary and it is showing up in quotes right now.
Four things to do before you sign anything:
- Get three quotes from separate Lennox dealers. With no published pricing, comparison is your only leverage.
- Demand the model number, not the series name. A quote that says Elite heat pump could be an EL16KP1 or an EL21KLV, a $2,000 difference at the same tonnage.
- Confirm R-454B in writing. If the quote is for R-410A equipment, you are buying into a refrigerant that is being phased down, with rising service costs ahead.
- Get registration in writing. Ask the dealer to register the system before leaving and to forward you the confirmation, since the 60-day window is the difference between 5 and 10 years of parts coverage.
If your home has no ductwork, or if only part of the house needs conditioning, a ducted Lennox heat pump may not be the right comparison at all. Our mini split vs central AC cost comparison covers when a ductless system is the cheaper path.
Frequently Asked Questions
How much does a Lennox heat pump cost installed?
A Lennox heat pump costs $5,800 to $14,200 installed in 2026, depending on the series and the tonnage your home needs. A Merit single-stage unit sits at the bottom of that range, an Elite variable-capacity unit runs roughly $7,400 to $11,800, and the Signature SL22KLV tops out near $14,200. The most common project, a 3-ton Elite heat pump on existing ductwork, lands between $8,200 and $10,500.
Which Lennox heat pump is best for cold climates?
The Dave Lennox Signature SL22KLV is the cold-climate model. Lennox rates it to operate down to minus 20 degrees Fahrenheit, and it carries an HSPF2 of 10.5 with a SEER2 up to 21.1 and an EER2 of 13.2. It is certified ENERGY STAR Most Efficient Cold Climate 2025. The Elite EL21KLV is the step-down cold-climate option at up to 21 SEER2 and 10.0 HSPF2. In a genuinely cold region, expect to pair either unit with electric backup heat or a gas furnace in a dual-fuel setup.
Is the federal heat pump tax credit still available in 2026?
No. The Section 25C Energy Efficient Home Improvement Credit applied to qualifying property placed in service through December 31, 2025. The IRS states the credit is allowed for property placed in service on or after January 1, 2023 and before December 31, 2025, and ENERGY STAR states it was effective for products purchased and installed between January 1, 2023 and December 31, 2025. A heat pump installed in 2026 does not qualify for the former $2,000 federal credit. Several HVAC pricing sites still advertise the credit for 2026 installs, which is incorrect. Manufacturer rebates, state programs, and utility incentives are the remaining levers.
What is the difference between Lennox Merit, Elite, and Signature heat pumps?
The three series differ in compressor technology, efficiency ceiling, sound level, and warranty:
- Merit is the entry line, running single-stage or two-stage compressors with SEER2 up to 17.5 and HSPF2 of 8.2 to 9.6, at 57 to 74 decibels.
- Elite is the mid-range line with variable-capacity compressors, SEER2 up to 21, HSPF2 up to 10.0, and 54 to 71 decibels.
- Signature is a single flagship heat pump, the SL22KLV, with a variable-speed compressor and Electronic Refrigerant Injection, up to 21.1 SEER2, 10.5 HSPF2, 58 decibels, and cold-climate operation to minus 20 degrees Fahrenheit.
- Warranty improves with tier: registered coverage is 10 years parts on Merit and Elite, and 12 years parts on Signature.
What happened to the Lennox XP25 and SL25XPV heat pumps?
They were replaced. The XP and XPV model names were the R-410A generation. Lennox has moved its entire residential heat pump lineup to R-454B, a lower global warming potential A2L refrigerant adopted under the EPA AIM Act phase-down, and renamed the models accordingly. The current catalog is SL22KLV, EL21KLV, EL19KPV, EL18KSLV, EL16KP1, ML16KP2, ML15KSPV, and ML14KP1. Any 2026 pricing article still quoting XP25, SL25XPV, ML17XP1, or EL18XPV prices is describing equipment your dealer can no longer order new. Ask for the model number on your quote, not just the series name.
What warranty comes with a Lennox heat pump?
Lennox coverage depends on whether you register the system within 60 days of installation:
- Unregistered: Merit gets 5 years components and 5 years compressor, Elite gets 5 years components and 10 years compressor, Signature gets 10 years components and 10 years compressor.
- Registered within 60 days: Merit and Elite upgrade to 10 years parts, Signature to 12 years parts.
- Labor trade-down: every tier can swap parts coverage for 3 years of labor, which is 7 years parts on Merit and Elite and 10 years parts on Signature.
- Automatic coverage: homeowners in California, Florida, Georgia, and Quebec receive the extended coverage without registering.
Lennox does not publish a lifetime compressor warranty on its current heat pumps, despite that claim appearing on many third-party sites.
For a personalized range based on your home size, climate, and efficiency target, use our free HVAC cost estimator. To see where Lennox heat pump pricing sits against the wider market, start with our heat pump replacement cost guide, and compare efficiency tiers in our HVAC cost by efficiency breakdown.
Last updated: July 2026. Installed price ranges reflect national averages and vary by region, dealer, and home condition. Model specifications, warranty terms, and rebate details verified July 31, 2026 from Lennox.com. Tax credit status verified July 31, 2026 from the IRS and ENERGY STAR. Competitor pricing from published Trane and Carrier guides.