Our take in 30 seconds
Best for: cold and very cold climatesStrengths
- Keeps 94% of its heat at 5°F, so backup heat rarely runs
- Heating efficiency (HSPF2 10) beats 77% of models
- Variable-speed compressor: quieter, steadier temperatures and better humidity control
- Uses newer, lower-impact R-454B refrigerant
Good to know
- Efficiency depends on the indoor unit: SEER2 ranges 15.2–18.5, so ask which pairing you're quoted
Running-cost calculator
Pre-filled with EIA prices · edit any fieldUses the base certified SEER2 (15.2) and HSPF2 (10). Assumes the unit is correctly sized. How we calculate.
Heating capacity as it gets colder
A heat pump's output falls as outdoor temperature drops. This is the certified heat output of the Lennox EL18KSLV-024-230A** at the three ENERGY STAR test temperatures (cooling capacity is 24,200 BTU/h for reference).
Retention at 17°F: 81% · at 5°F: 94%. Learn how to use these numbers in our cold-climate guide.
Estimated running cost in every state
Same unit, very different bills: from about $633 a year in Louisiana to $2,275 in Maine, driven by local electricity prices and how much heating or cooling the climate needs. Click a column to sort.
| State | Price | Heating | Cooling | Total / yr |
|---|---|---|---|---|
| Louisiana | 12.87¢ | $223 | $410 | $633 |
| Washington | 14.63¢ | $617 | $82 | $698 |
| Mississippi | 14.43¢ | $322 | $414 | $736 |
| Florida | 14.99¢ | $167 | $573 | $740 |
| Nevada | 12.72¢ | $379 | $365 | $743 |
| Tennessee | 13.42¢ | $466 | $278 | $744 |
| Oregon | 15.92¢ | $632 | $114 | $746 |
| Arizona | 15.05¢ | $261 | $527 | $788 |
| Kentucky | 13.80¢ | $548 | $242 | $789 |
| North Carolina | 14.95¢ | $482 | $309 | $791 |
| Arkansas | 14.37¢ | $463 | $343 | $806 |
| Utah | 13.31¢ | $627 | $191 | $818 |
| South Carolina | 15.76¢ | $430 | $401 | $831 |
| Georgia | 15.90¢ | $434 | $405 | $839 |
| Idaho | 13.37¢ | $696 | $149 | $845 |
| Alabama | 16.33¢ | $445 | $416 | $861 |
| Texas | 15.91¢ | $355 | $507 | $862 |
| Oklahoma | 14.82¢ | $515 | $354 | $868 |
| New Mexico | 16.51¢ | $614 | $263 | $877 |
| Nebraska | 13.54¢ | $705 | $194 | $899 |
| West Virginia | 16.31¢ | $728 | $208 | $936 |
| Missouri | 16.02¢ | $675 | $281 | $956 |
| Kansas | 15.47¢ | $691 | $271 | $962 |
| Virginia | 17.64¢ | $656 | $309 | $965 |
| Wyoming | 14.43¢ | $895 | $115 | $1,010 |
| Colorado | 17.17¢ | $852 | $191 | $1,043 |
| North Dakota | 13.31¢ | $957 | $95 | $1,053 |
| Indiana | 17.02¢ | $844 | $230 | $1,075 |
| Montana | 15.57¢ | $965 | $112 | $1,077 |
| Delaware | 18.70¢ | $788 | $298 | $1,086 |
| South Dakota | 15.15¢ | $939 | $157 | $1,096 |
| California | 29.75¢ | $664 | $474 | $1,138 |
| Iowa | 17.06¢ | $973 | $204 | $1,177 |
| Ohio | 19.38¢ | $961 | $247 | $1,208 |
| Maryland | 21.40¢ | $902 | $341 | $1,243 |
| Illinois | 19.32¢ | $1,006 | $246 | $1,252 |
| Minnesota | 17.20¢ | $1,152 | $151 | $1,302 |
| Pennsylvania | 21.77¢ | $1,080 | $277 | $1,357 |
| Wisconsin | 19.41¢ | $1,203 | $185 | $1,389 |
| New Jersey | 24.61¢ | $1,099 | $353 | $1,451 |
| District of Columbia | 25.98¢ | $1,031 | $455 | $1,486 |
| Michigan | 22.99¢ | $1,368 | $220 | $1,588 |
| Connecticut | 24.51¢ | $1,337 | $254 | $1,591 |
| Vermont | 23.84¢ | $1,537 | $171 | $1,708 |
| Rhode Island | 28.18¢ | $1,538 | $269 | $1,807 |
| New York | 28.65¢ | $1,563 | $296 | $1,860 |
| New Hampshire | 27.64¢ | $1,714 | $220 | $1,934 |
| Hawaii | 47.18¢ | $59 | $1,953 | $2,012 |
| Massachusetts | 30.48¢ | $1,739 | $291 | $2,030 |
| Alaska | 29.41¢ | $2,188 | $47 | $2,235 |
| Maine | 32.11¢ | $2,070 | $204 | $2,275 |
Similar-size alternatives
Other ducted split system units within ±15% of this model's cooling capacity, sorted by efficiency. Cost difference is versus the Lennox EL18KSLV-024-230A** at U.S.-average rates.
| Model | Cooling BTU/h | SEER2 | HSPF2 | 5°F kept | Est. yearly cost | |
|---|---|---|---|---|---|---|
| Carrier 27VNA324A*030* | 23,800 | 18–23 | 10.5 | 82% | $1,044 (+$6) | Compare |
| Rheem RP19AY24AJVC | 22,800 | 20–21 | 10 | 81% | $925 (−$114) | Compare |
| Trane 5TWR7024A1 | 24,000 | 15.2–17.1 | 11 | 79% | $907 (−$132) | Compare |
| Trane 5TWX7024A1 | 24,000 | 15.2–18 | 11 | 79% | $907 (−$132) | Compare |
| Bryant 37MUHAQ24AA3 | 24,000 | 16–18.7 | 10.5 | 86% | $991 (−$47) | Compare |
| ACiQ ACIQ-24-HPD | 24,000 | 16–18.6 | 10.5 | 83% | $1,019 (−$20) | Compare |
Full specifications
| Brand | Lennox |
| Outdoor model | EL18KSLV-024-230A** |
| Certified by | Lennox Industries |
| Product type | Ducted split system |
| Compressor | Variable-speed (inverter) |
| Refrigerant | R-454B |
| Cooling capacity | 24,200 BTU/h |
| Nominal size | 2 tons |
| SEER2 (certified range) | 15.2 – 18.5 |
| EER2 (best) | 12.3 |
| HSPF2 (best) | 10 |
| Heating capacity @ 47°F | 24,800 BTU/h |
| Heating capacity @ 17°F | 20,200 BTU/h |
| Heating capacity @ 5°F | 23,400 BTU/h |
| COP @ 5°F | 1.85 |
| ENERGY STAR cold-climate | Yes |
| Certified indoor pairings | 205 |
| Latest certification | 2026-09 |
Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), retrieved November 7, 2026. Capacities and HSPF2 are the highest values across certified pairings; confirm your exact system's AHRI reference number with your installer.
Frequently asked questions
How much does the Lennox EL18KSLV-024-230A** cost to run per year?
At the U.S. average residential electricity price of 18.16¢/kWh and typical national heating and cooling hours, we estimate about $1,039 per year ($721 heating, $318 cooling). It ranges from about $633 in Louisiana to $2,275 in Maine.
Does the Lennox EL18KSLV-024-230A** work in cold weather?
Yes. It is ENERGY STAR cold-climate certified and delivers 23,400 BTU/h at 5°F, 94% of its 47°F capacity, with a COP of 1.85 at 5°F.
What size is the Lennox EL18KSLV-024-230A**?
It is rated at 24,200 BTU/h of cooling, roughly 2 tons, and 24,800 BTU/h of heating at 47°F. Proper sizing should be confirmed with a Manual J load calculation.