What is the SEER2 rating of the Lennox EL17XP1-042-230A?

The Lennox EL17XP1-042-230A is rated at up to 15.6 SEER2 and 13.0 EER2 for cooling and up to 8.3 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 188 certified matchups SEER2 ranges from 15.2-15.6.

Is the Lennox EL17XP1-042-230A 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 3.5-ton model.

How much does the Lennox EL17XP1-042-230A cost to run per year?

At its rated efficiency it costs about $1,240-$3,040 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,495 in Phoenix and $2,509 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 EL17XP1-042-230A?

ENERGY STAR lists 188 certified combinations for this outdoor unit. The highest-rated ones use CBA38MV-042-230*+TDR, CBA27UHE-042-230*+TDR, CRX35-48C-**-*+TDR.

What refrigerant does the Lennox EL17XP1-042-230A 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.

3.5-ton central heat pump · ELITE EL17XP1 Series

Lennox EL17XP1-042-230A

Below average cooling and heating efficiency for a 3.5-ton central heat pump, but not rated for cold climates.

Ranks #93 of 138 3.5 ton central heat pumps for cooling efficiency, and costs about $1,300 a year to run in a mixed climate like Atlanta.

SEER2: 15.6 Cooling efficiency over a season
Below average · beats 17%
HSPF2: 8.3 Heating efficiency over a season
Below average · beats 30%
EER2: 13.0 Cooling efficiency on a 95°F day
Very good · beats 89%
Heat at 5°F: 22,000 BTU/h52% of its 47°F output
Very good · beats 80%

A good fit if…

You want a choice of indoor units - 188 certified pairings.

Think twice if…

You often see nights below 0°F - it is not cold-climate certified.
Cooling cost matters most - its SEER2 is below average for central heat pumps.
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.

Calculate my running cost

Details

Specifications3.5 ton, R-410A

General
Brand	Lennox
Outdoor unit model	EL17XP1-042-230A
Series	ELITE EL17XP1 Series
Type	Central heat pump
Nominal size	3.5 ton
CompressorVariable-speed units run longer at low power	Single stage
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	January 10, 2022
Last certified	October 27, 2025
Cooling
SEER2Seasonal efficiency, higher is better	15.6 (range 15.2-15.6)
EER2Efficiency at 95°F outdoors	12.5-13.0
Cooling capacity	40,000-42,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8-8.3
Capacity at 47°F	37,600-42,000 BTU/h
Capacity at 17°F	25,000-27,800 BTU/h
Capacity at 5°F	10,400-22,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.00-2.22
ENERGY STAR cold climate	No

Heating output as it gets colder52% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with CBA38MV-042-230*+TDR at the standard test temperatures, in BTU/h:

Certified matchups188 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 188 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.
CBA38MV-042-230*+TDR	-	15.6	13.0	8.3	20,600	210293753
CBA27UHE-042-230*+TDR	-	15.6	13.0	8.3	22,000	210293752
CRX35-48C-*-+TDR	ML180DF110E60C*	15.6	13.0	8.3	21,800	213257813
CK40DT-48C-0*+TDR	ML180DF110E60C*	15.6	13.0	8.3	21,800	214622738
CBK47UHET-042-230-0	-	15.6	13.0	8.3	22,000	214861226
CX35-49C+TDR	SL280UH100NV60C*	15.6	13.0	7.8	19,900	210293906
C35-49C+TDR+TXV	SL280UH100NV60C*	15.6	13.0	7.8	19,900	210293742
CX35-49C+TDR	ML180UH110V60C*	15.6	13.0	7.8	19,900	210293892
C35-49C+TDR+TXV	ML180UH110V60C*	15.6	13.0	7.8	19,900	210293728
CK40CT-49C-0*+TDR	ML180UH110V60C*	15.6	13.0	7.8	19,900	214622767
CK40CT-49C-0*+TDR	SL280UH100NV60C*	15.6	13.0	7.8	19,900	214622781
C35-48C+TDR+TXV	EL280UH110E48C*	15.6	13.0	7.8	19,600	215223654
C35-48C+TDR+TXV	EL280UH110E60C*	15.6	13.0	7.8	19,600	215223655
C35-48C+TDR+TXV	EL280UH110XE60C*	15.6	13.0	7.8	19,600	215223656
C35-48C+TDR+TXV	ML180UH110V60C*	15.6	13.0	7.8	19,700	215223659
C35-48C+TDR+TXV	SL280UH080NV60C*	15.6	13.0	7.8	19,700	215223666
C35-48C+TDR+TXV	SL280UH100NV60C*	15.6	13.0	7.8	19,700	215223669
CHX35-42B-*-+TDR	EL280UH090E48B*	15.6	13.0	7.8	19,900	215223674
CHX35-42B-*-+TDR	EL280UH090XE48B*	15.6	13.0	7.8	19,900	215223675
CX35-48C+TDR	EL280UH110E48C*	15.6	13.0	7.8	19,600	215223689
CX35-48C+TDR	EL280UH110E60C*	15.6	13.0	7.8	19,600	215223690
CX35-48C+TDR	EL280UH110XE60C*	15.6	13.0	7.8	19,600	215223691
CX35-48C+TDR	ML180UH110V60C*	15.6	13.0	7.8	19,700	215223694
CX35-48C+TDR	SL280UH080NV60C*	15.6	13.0	7.8	19,700	215223701
CX35-48C+TDR	SL280UH100NV60C*	15.6	13.0	7.8	19,700	215223704
CK40HT-42B-0*+TDR	EL280UH090E48B*	15.6	13.0	7.8	19,900	215223760
CK40HT-42B-0*+TDR	EL280UH090XE48B*	15.6	13.0	7.8	19,900	215223761
CK40CT-48C-0*+TDR	EL280UH110E48C*	15.6	13.0	7.8	19,600	215223885
CK40CT-48C-0*+TDR	EL280UH110E60C*	15.6	13.0	7.8	19,600	215223886
CK40CT-48C-0*+TDR	EL280UH110XE60C*	15.6	13.0	7.8	19,600	215223887
CK40CT-48C-0*+TDR	ML180UH110V60C*	15.6	13.0	7.8	19,700	215223897
CK40CT-48C-0*+TDR	SL280UH080NV60C*	15.6	13.0	7.8	19,700	215223909
CK40CT-48C-0*+TDR	SL280UH100NV60C*	15.6	13.0	7.8	19,700	215223912
CRX35-48C-*-+TDR	SL280DF110V60C*	15.4	13.0	8.3	22,000	213257816
CK40DT-48C-0*+TDR	SL280DF110V60C*	15.4	13.0	8.3	22,000	214622745
CBA25UHV-042-230-	-	15.4	13.0	8.1	20,200	210293751
CBK45UHVT-042-230-0	-	15.4	13.0	8.1	20,200	214861225
CK40HT-42B-0*+TDR	SL280UH080NV48B*	15.4	13.0	8.0	20,200	215223778
CHX35-42B-*-+TDR	ML180UH070V48B*	15.4	13.0	8.0	22,000	215223678
CHX35-42B-*-+TDR	SL280UH080NV48B*	15.4	13.0	8.0	20,200	215223680
CK40HT-42B-0*+TDR	ML180UH070V48B*	15.4	13.0	8.0	22,000	215223767
C35-49C+TDR+TXV	SL280UH080NV60C*	15.4	13.0	7.8	19,900	210293739
CX35-49C+TDR	SL280UH080NV60C*	15.4	13.0	7.8	19,900	210293903
C35-49C+TDR+TXV	ML180UH110E60C*	15.4	12.5	7.8	19,800	210293727
C35-49C+TDR+TXV	EL280UH110E48C*	15.4	13.0	7.8	19,600	210293716
CX35-49C+TDR	ML180UH110E60C*	15.4	12.5	7.8	19,800	210293891
CX35-49C+TDR	ML180UH090E60C*	15.4	12.5	7.8	19,800	210293890
C35-49C+TDR+TXV	EL280UH110XE60C*	15.4	13.0	7.8	19,900	210293718
CHX35-48C-*-+TDR	SL280UH100NV60C*	15.4	13.0	7.8	20,200	210293825
CX35-49C+TDR	EL280UH110E60C*	15.4	13.0	7.8	19,900	210293881
CHX35-48C-*-+TDR	ML180UH110V60C*	15.4	13.0	7.8	10,400	210293811
C35-49C+TDR+TXV	ML180UH090E60C*	15.4	12.5	7.8	19,800	210293726
CX35-49C+TDR	EL280UH110XE60C*	15.4	13.0	7.8	19,900	210293882
CX35-49C+TDR	EL280UH110E48C*	15.4	13.0	7.8	19,600	210293880
C35-49C+TDR+TXV	EL280UH110E60C*	15.4	13.0	7.8	19,900	210293717
CK40HT-48C-0*+TDR	ML180UH110V60C*	15.4	13.0	7.8	10,400	214622710
CK40HT-48C-0*+TDR	SL280UH100NV60C*	15.4	13.0	7.8	20,200	214622724
CK40CT-49C-0*+TDR	EL280UH110E48C*	15.4	13.0	7.8	19,600	214622755
CK40CT-49C-0*+TDR	EL280UH110E60C*	15.4	13.0	7.8	19,900	214622756
CK40CT-49C-0*+TDR	EL280UH110XE60C*	15.4	13.0	7.8	19,900	214622757

Yearly running cost in 10 large cities$1,240-$3,040

Phoenix, AZ$1,495/yr
Miami, FL$1,246/yr
Houston, TX$1,339/yr
Atlanta, GA$1,300/yr
Los Angeles, CA$1,253/yr
New York, NY$3,040/yr
Chicago, IL$2,455/yr
Denver, CO$2,031/yr
Seattle, WA$1,240/yr
Minneapolis, MN$2,509/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 EL17XP1-042-230A?: The Lennox EL17XP1-042-230A is rated at up to 15.6 SEER2 and 13.0 EER2 for cooling and up to 8.3 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 188 certified matchups SEER2 ranges from 15.2-15.6.
Is the Lennox EL17XP1-042-230A 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 3.5-ton model.
How much does the Lennox EL17XP1-042-230A cost to run per year?: At its rated efficiency it costs about $1,240-$3,040 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,495 in Phoenix and $2,509 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 EL17XP1-042-230A?: ENERGY STAR lists 188 certified combinations for this outdoor unit. The highest-rated ones use CBA38MV-042-230*+TDR, CBA27UHE-042-230*+TDR, CRX35-48C-**-*+TDR.
What refrigerant does the Lennox EL17XP1-042-230A 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 $1,463/yrYou save $636/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 EL17XP1-042-230A

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: $1,463
Current system, per year: $2,099
You save per year: $636
Payback: 24.4 years
Net after 10 years: -$9,137

Cooling $936Heating $526Electricity used: 9,142 kWhSaved vs. a minimum-efficiency heat pump: $141

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 3.5 ton models

GE NS17H42SA4-**A15.6 SEER2 · 8.3 HSPF2
Ducane 4HP17L42P-**A15.6 SEER2 · 8.3 HSPF2
MRCOOL MHP17L42P-**A15.6 SEER2 · 8.3 HSPF2
Comfort-Aire HRG1542S1R-**A15.6 SEER2 · 8.3 HSPF2
Hisense AUWR-48U3SP · cold climate15.6 SEER2 · 8.6 HSPF2
Blueridge BHP17L42P-**A15.6 SEER2 · 8.3 HSPF2
AIREASE A7HP14F42P-**A15.5 SEER2 · 8.2 HSPF2
Armstrong Air 4SHP17LE142P-**A15.6 SEER2 · 8.3 HSPF2

See all 138 3.5 ton central heat pumps, ranked

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