What is the SEER2 rating of the Lennox EL17XP1-018-230A?

The Lennox EL17XP1-018-230A is rated at up to 16.8 SEER2 and 14.0 EER2 for cooling and up to 8.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 459 certified matchups SEER2 ranges from 15.2-16.8.

Is the Lennox EL17XP1-018-230A good for cold climates?

It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 1.5-ton model.

How much does the Lennox EL17XP1-018-230A cost to run per year?

At its rated efficiency it costs about $503-$1,303 a year in electricity in large U.S. cities, depending on climate and local rates - for example $614 in Phoenix and $1,084 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Which indoor units work with the Lennox EL17XP1-018-230A?

ENERGY STAR lists 459 certified combinations for this outdoor unit. The highest-rated ones use CHX35-30B-**-*+TDR, CX35-30B+TDR, CHX35-24B-**-*+TDR.

What refrigerant does the Lennox EL17XP1-018-230A use?

It uses R-410A. R-410A is being phased down under the EPA AIM Act, and new systems are moving to R-454B and R-32.

1.5-ton central heat pump · ELITE EL17XP1 Series

Lennox EL17XP1-018-230A

Average cooling efficiency and below average heating efficiency for a 1.5-ton central heat pump, but not rated for cold climates.

Ranks #79 of 170 1.5 ton central heat pumps for cooling efficiency, and costs about $549 a year to run in a mixed climate like Atlanta.

SEER2: 16.8 Cooling efficiency over a season
Average · beats 45%
HSPF2: 8.5 Heating efficiency over a season
Below average · beats 38%
EER2: 14.0 Cooling efficiency on a 95°F day
Excellent · beats 98%
Heat at 5°F: 9,700 BTU/h45% of its 47°F output
Very good · beats 70%

A good fit if…

You want a choice of indoor units - 459 certified pairings.

Think twice if…

You often see nights below 0°F - it is not cold-climate certified.
You mainly need heat - its HSPF2 is below average for central heat pumps.
You want the newest refrigerant - it uses R-410A, which is being phased down.
Comfort and noise matter - a single-stage compressor runs only full-on or off.

Calculate my running cost

Details

Specifications1.5 ton, R-410A

General
Brand	Lennox
Outdoor unit model	EL17XP1-018-230A
Series	ELITE EL17XP1 Series
Type	Central heat pump
Nominal size	1.5 ton
CompressorVariable-speed units run longer at low power	Single stage
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	January 5, 2022
Last certified	October 27, 2025
Cooling
SEER2Seasonal efficiency, higher is better	16.8 (range 15.2-16.8)
EER2Efficiency at 95°F outdoors	12.2-14.0
Cooling capacity	17,800-18,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8-8.5
Capacity at 47°F	16,000-18,000 BTU/h
Capacity at 17°F	10,200-12,100 BTU/h
Capacity at 5°F	7,500-9,700 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.90-2.16
ENERGY STAR cold climate	No

Heating output as it gets colder45% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with CHX35-30B-**-*+TDR at the standard test temperatures, in BTU/h:

Certified matchups459 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 459 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

Indoor unit	Furnace	SEER2	EER2	HSPF2	Heat @5°F	AHRI ref.
CHX35-30B-*-+TDR	SL297UH060NV36B*	16.8	14.0	8.1	7,800	210288978
CX35-30B+TDR	ML180UH070V48B*	16.8	13.5	8.1	8,000	210290607
CHX35-24B-*-+TDR	SL280UH090V36B*	16.8	14.0	8.1	8,400	210288942
CHX35-24A-*-+TDR	SL280UH060NV36A*	16.8	14.0	8.1	8,200	210288911
CX35-30B+TDR	SL280UH080NV48B*	16.8	14.0	8.1	7,800	210290633
CX35-30B+TDR	SL280UH090V36B*	16.8	14.0	8.1	8,000	210290636
C35-30B+TDR+TXV	ML180UH070V48B*	16.8	13.5	8.1	8,000	210288799
CHX35-30B-*-+TDR	ML180UH070V48B*	16.8	14.0	8.1	8,000	210288962
C35-30B+TDR+TXV	SL280UH080NV48B*	16.8	14.0	8.1	7,800	210288811
CHX35-30B-*-+TDR	SL280UH080NV48B*	16.8	14.0	8.1	8,000	210288974
CHX35-24B-*-+TDR	SL280UH080NV48B*	16.8	14.0	8.1	8,400	210288941
C35-30B+TDR+TXV	SL280UH090V36B*	16.8	14.0	8.1	8,000	210288812
CK40HT-24A-0*+TDR	SL280UH060NV36A*	16.8	14.0	8.1	8,200	214621832
CK40HT-24B-0*+TDR	SL280UH080NV48B*	16.8	14.0	8.1	8,400	214621862
CK40HT-24B-0*+TDR	SL280UH090V36B*	16.8	14.0	8.1	8,400	214621863
CK40HT-30B-0*+TDR	ML180UH070V48B*	16.8	14.0	8.1	8,000	214621884
CK40HT-30B-0*+TDR	SL280UH080NV48B*	16.8	14.0	8.1	8,000	214621896
CK40HT-30B-0*+TDR	SL297UH060NV36B*	16.8	14.0	8.1	7,800	214621900
CK40CT-30B-0*+TDR	ML180UH070V48B*	16.8	13.5	8.1	8,000	214622003
CK40CT-30B-0*+TDR	SL280UH080NV48B*	16.8	14.0	8.1	7,800	214622015
CK40CT-30B-0*+TDR	SL280UH090V36B*	16.8	14.0	8.1	8,000	214622016
C35-30A+TDR+TXV	EL280UH070XE36A*	16.8	13.5	8.0	7,600	210288775
C35-30B+TDR+TXV	SL297UH040NV36B*	16.8	13.5	8.0	7,800	210288814
CX35-30A+TDR	SL280UH060NV36A*	16.8	14.0	8.0	7,900	210290563
C35-30A+TDR+TXV	SL280UH060NV36A*	16.8	14.0	8.0	7,900	210288782
CHX35-30B-*-+TDR	ML180UH070V36B*	16.8	14.0	8.0	7,700	210288961
C35-30B+TDR+TXV	SL297UH060NV36B*	16.8	13.5	8.0	7,800	210288815
CHX35-30B-*-+TDR	ML193UH045XE36B*	16.8	13.5	8.0	7,900	210288966
CHX35-30B-*-+TDR	ML180UH070E36B*	16.8	13.5	8.0	7,700	210288960
CHX35-30B-*-+TDR	EL280UH090E36B*	16.8	14.0	8.0	7,600	210288953
CX35-30A+TDR	EL280UH070E36A*	16.8	13.5	8.0	7,600	210290542
CHX35-30B-*-+TDR	SLP99UH070XV36B*	16.8	14.0	8.0	7,800	210288979
CX35-30A+TDR	EL280UH070XE36A*	16.8	13.5	8.0	7,600	210290545
CHX35-30B-*-+TDR	ML193UH070XE36B*	16.8	13.5	8.0	7,600	210288967
CX35-30B+TDR	SL297UH060NV36B*	16.8	13.5	8.0	7,800	210290645
C35-30B+TDR+TXV	EL280UH090E36B*	16.8	14.0	8.0	7,600	210288791
C35-30A+TDR+TXV	EL280UH070E36A*	16.8	13.5	8.0	7,600	210288774
CX35-30B+TDR	EL280UH090E36B*	16.8	14.0	8.0	7,600	210290582
CX35-30B+TDR	SLP99UH070XV36B*	16.8	13.5	8.0	7,800	210290650
C35-30B+TDR+TXV	SLP99UH070XV36B*	16.8	13.5	8.0	7,800	210288816
CHX35-30B-*-+TDR	SL297UH040NV36B*	16.8	14.0	8.0	7,800	210288977
CX35-30B+TDR	SL297UH040NV36B*	16.8	13.5	8.0	7,800	210290643
C35-30B+TDR+TXV	EL297UH070XV36B*	16.8	13.5	8.0	7,800	213194554
CX35-30B+TDR	EL297UH070XV36B*	16.8	13.5	8.0	7,800	213194562
CHX35-30B-*-+TDR	EL297UH070XV36B*	16.8	14.0	8.0	7,800	213194558
CK40HT-30B-0*+TDR	EL280UH090E36B*	16.8	14.0	8.0	7,600	214621875
CK40CT-30A-0*+TDR	EL280UH070E36A*	16.8	13.5	8.0	7,600	214621976
CK40CT-30A-0*+TDR	EL280UH070XE36A*	16.8	13.5	8.0	7,600	214621977
CK40HT-30B-0*+TDR	EL297UH070XV36B*	16.8	14.0	8.0	7,800	214621881
CK40HT-30B-0*+TDR	ML180UH070V36B*	16.8	14.0	8.0	7,700	214621883
CK40HT-30B-0*+TDR	ML180UH070E36B*	16.8	13.5	8.0	7,700	214621882
CK40HT-30B-0*+TDR	ML193UH045XE36B*	16.8	13.5	8.0	7,900	214621888
CK40HT-30B-0*+TDR	ML193UH070XE36B*	16.8	13.5	8.0	7,600	214621889
CK40HT-30B-0*+TDR	SL297UH040NV36B*	16.8	14.0	8.0	7,800	214621899
CK40HT-30B-0*+TDR	SLP99UH070XV36B*	16.8	14.0	8.0	7,800	214621901
CK40CT-30A-0*+TDR	SL280UH060NV36A*	16.8	14.0	8.0	7,900	214621984
CK40CT-30B-0*+TDR	EL280UH090E36B*	16.8	14.0	8.0	7,600	214621994
CK40CT-30B-0*+TDR	EL297UH070XV36B*	16.8	13.5	8.0	7,800	214622000
CK40CT-30B-0*+TDR	SL297UH040NV36B*	16.8	13.5	8.0	7,800	214622018
CK40CT-30B-0*+TDR	SL297UH060NV36B*	16.8	13.5	8.0	7,800	214622019

Yearly running cost in 10 large cities$503-$1,303

Phoenix, AZ$614/yr
Miami, FL$503/yr
Houston, TX$550/yr
Atlanta, GA$549/yr
Los Angeles, CA$533/yr
New York, NY$1,303/yr
Chicago, IL$1,056/yr
Denver, CO$877/yr
Seattle, WA$538/yr
Minneapolis, MN$1,084/yr

At each state's average electricity price and the city's typical heating and cooling hours.

Questions5

What is the SEER2 rating of the Lennox EL17XP1-018-230A?: The Lennox EL17XP1-018-230A is rated at up to 16.8 SEER2 and 14.0 EER2 for cooling and up to 8.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 459 certified matchups SEER2 ranges from 15.2-16.8.
Is the Lennox EL17XP1-018-230A good for cold climates?: It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 1.5-ton model.
How much does the Lennox EL17XP1-018-230A cost to run per year?: At its rated efficiency it costs about $503-$1,303 a year in electricity in large U.S. cities, depending on climate and local rates - for example $614 in Phoenix and $1,084 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Which indoor units work with the Lennox EL17XP1-018-230A?: ENERGY STAR lists 459 certified combinations for this outdoor unit. The highest-rated ones use CHX35-30B-**-*+TDR, CX35-30B+TDR, CHX35-24B-**-*+TDR.
What refrigerant does the Lennox EL17XP1-018-230A use?: It uses R-410A. R-410A is being phased down under the EPA AIM Act, and new systems are moving to R-454B and R-32.

Running cost and savings

Pre-filled with this model. Pick your city and what you heat with today; everything else is optional.

Heat pump $606/yrYou save $312/yrSee details ↓

1. Where you live

StateCityElectricity ¢ per kWh

Adjust heating and cooling hours

Filled in from your city's climate. Change them if you run the system much more or less than usual.

Cooling hours full-load hours per yearHeating hours full-load hours per year

2. The heat pump Lennox EL17XP1-018-230A

Find a model (fills in the ratings below)

SEER2 cooling efficiencyHSPF2 heating efficiencyCooling capacity BTU/hHeating capacity BTU/h

3. What it replaces

Current heatingFurnace efficiency (AFUE %)Gas price, $/thermCurrent coolingOld AC rating SEER2 (10 ≈ 15+ years old)

4. Price replace the example with your quote

Installed price, $Rebates and incentives, $ utility, state

Heat pump, per year: $606
Current system, per year: $918
You save per year: $312
Payback: 22.4 years
Net after 10 years: -$3,881

Cooling $377Heating $229Electricity used: 3,790 kWhSaved vs. a minimum-efficiency heat pump: $97

Estimates use the unit's rated SEER2 and HSPF2, full-load hours derived from NOAA 1991-2020 degree days, average residential electricity prices from the U.S. EIA (12 months to July 2026) and fuel prices from EIA (2025 for natural gas, week of 2026-10-05 for propane and heating oil). Very cold days that need backup heat are not modelled. Federal minimum for comparison: 14.3 SEER2 / 7.5 HSPF2.

Similar 1.5 ton models

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Ducane 4HP17L18P-**A16.8 SEER2 · 8.5 HSPF2
Blueridge BHP17L18P-**A16.8 SEER2 · 8.4 HSPF2
Comfort-Aire HRG1518S1R-**A16.8 SEER2 · 8.5 HSPF2
Century HRG1**8S1R-**A16.8 SEER2 · 8.1 HSPF2
Armstrong Air 4SHP17LE118P-**A16.8 SEER2 · 8.5 HSPF2
MRCOOL MHP17018A-**A16.8 SEER2 · 8.1 HSPF2
Jetson HP-18ODU-001 · cold climate17.0 SEER2 · 9.3 HSPF2

See all 170 1.5 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of October 27, 2025. How we use the data.