What is the SEER2 rating of the Arcoaire D5CSRAH18AAK?

The Arcoaire D5CSRAH18AAK is rated at up to 23.9 SEER2 and 12.5 EER2 for cooling and up to 13.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 89 certified matchups SEER2 ranges from 18.5-23.9.

Is the Arcoaire D5CSRAH18AAK good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 14,200 BTU/h at 5°F with a COP of 2.40, so it is still 2.4 times as efficient as electric resistance heat at that temperature.

How much does the Arcoaire D5CSRAH18AAK cost to run per year?

At its rated efficiency it costs about $352-$862 a year in electricity in large U.S. cities, depending on climate and local rates - for example $424 in Phoenix and $712 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 Arcoaire D5CSRAH18AAK?

ENERGY STAR lists 89 certified combinations for this outdoor unit. The highest-rated ones use ARCOAIRE D5FSFAH16XAK, COMFORTMAKER D5FSFAH16XAK, DAY & NIGHT D5FSFAH16XAK.

18,000 BTU mini-split heat pump · D5F Series

Arcoaire D5CSRAH18AAK

Very good cooling efficiency and excellent heating efficiency for a 18,000 BTU mini-split heat pump, and certified for cold climates.

Ranks #93 of 465 18,000 BTU mini-splits for cooling efficiency, and costs about $369 a year to run in a mixed climate like Atlanta.

SEER2: 23.9 Cooling efficiency over a season
Very good · beats 72%
HSPF2: 13.5 Heating efficiency over a season
Excellent · beats 96%
EER2: 12.5 Cooling efficiency on a 95°F day
Average · beats 44%
Heat at 5°F: 14,200 BTU/h77% of its 47°F output
Excellent · beats 93%

A good fit if…

You want low cooling bills - its SEER2 beats 72% of mini-splits.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 14,200 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 96% of mini-splits.
You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

Nothing stands out - its ratings have no weak spot for its class.

Calculate my running cost

Details

Specifications18,000 BTU, R-454B

General
Brand	Arcoaire
Also sold as	Comfortmaker, Day & Night, Heil, Keeprite, Kenmore, Midea, Tempstar, Smart Comfort, Airquest, LPS Legacy, Grandaire
Outdoor unit model	D5CSRAH18AAK
Series	D5F Series
Type	Mini-split heat pump
Nominal size	18,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	November 15, 2018
Last certified	May 6, 2026
Cooling
SEER2Seasonal efficiency, higher is better	23.9 (range 18.5-23.9)
EER2Efficiency at 95°F outdoors	12.2-13.3
Cooling capacity	16,000-18,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	9.8-13.5
Capacity at 47°F	17,000-20,000 BTU/h
Capacity at 17°F	13,200-15,000 BTU/h
Capacity at 5°F	12,800-14,200 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.05-2.40
ENERGY STAR cold climate	Yes

Heating output as it gets colder77% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with D5FSFAH16XAK at the standard test temperatures, in BTU/h:

Certified matchups89 indoor units

The same outdoor unit scores differently with each indoor unit. The 60 highest-rated of 89 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

Indoor unit	SEER2	EER2	HSPF2	Heat @5°F	AHRI ref.
D5FSFAH16XAK ARCOAIRE · cold climate	23.9	12.5	13.5	13,100	215324145
D5FSFAH16XAK COMFORTMAKER · cold climate	23.9	12.5	13.5	13,100	215324218
D5FSFAH16XAK DAY & NIGHT · cold climate	23.9	12.5	13.5	13,100	215324291
D5FSFAH16XAK HEIL · cold climate	23.9	12.5	13.5	13,100	215324364
D5FSFAH16XAK KEEPRITE · cold climate	23.9	12.5	13.5	13,100	215324437
D5FSFAH16XAK KENMORE · cold climate	23.9	12.5	13.5	13,100	215324510
D5FSFAH16XAK MIDEA · cold climate	23.9	12.5	13.5	13,100	215324583
D5FSFAH16XAK TEMPSTAR · cold climate	23.9	12.5	13.5	13,100	215324656
D5FSFAH16XAK SMART COMFORT · cold climate	23.9	12.5	13.5	13,100	215324729
D5FSFAH16XAK AIRQUEST · cold climate	23.9	12.5	13.5	13,100	215324802
D5FSFAH16XAK LPS Legacy · cold climate	23.9	12.5	13.5	13,100	215324875
D5FSHAH18XAK ARCOAIRE · cold climate	23.5	12.8	10.8	12,800	215324142
D5FSHAH18XAK COMFORTMAKER · cold climate	23.5	12.8	10.8	12,800	215324215
D5FSHAH18XAK DAY & NIGHT · cold climate	23.5	12.8	10.8	12,800	215324288
D5FSHAH18XAK HEIL · cold climate	23.5	12.8	10.8	12,800	215324361
D5FSHAH18XAK KEEPRITE · cold climate	23.5	12.8	10.8	12,800	215324434
D5FSHAH18XAK KENMORE · cold climate	23.5	12.8	10.8	12,800	215324507
D5FSHAH18XAK MIDEA · cold climate	23.5	12.8	10.8	12,800	215324580
D5FSHAH18XAK TEMPSTAR · cold climate	23.5	12.8	10.8	12,800	215324653
D5FSHAH18XAK SMART COMFORT · cold climate	23.5	12.8	10.8	12,800	215324726
D5FSHAH18XAK AIRQUEST · cold climate	23.5	12.8	10.8	12,800	215324799
D5FSHAH18XAK LPS Legacy · cold climate	23.5	12.8	10.8	12,800	215324872
D5FCFAH18XAK ARCOAIRE · cold climate	22.4	12.5	10.4	12,800	215324146
D5FCFAH18XAK COMFORTMAKER · cold climate	22.4	12.5	10.4	12,800	215324219
D5FCFAH18XAK DAY & NIGHT · cold climate	22.4	12.5	10.4	12,800	215324292
D5FCFAH18XAK HEIL · cold climate	22.4	12.5	10.4	12,800	215324365
D5FCFAH18XAK KEEPRITE · cold climate	22.4	12.5	10.4	12,800	215324438
D5FCFAH18XAK KENMORE · cold climate	22.4	12.5	10.4	12,800	215324511
D5FCFAH18XAK MIDEA · cold climate	22.4	12.5	10.4	12,800	215324584
D5FCFAH18XAK TEMPSTAR · cold climate	22.4	12.5	10.4	12,800	215324657
D5FCFAH18XAK SMART COMFORT · cold climate	22.4	12.5	10.4	12,800	215324730
D5FCFAH18XAK AIRQUEST · cold climate	22.4	12.5	10.4	12,800	215324803
D5FCFAH18XAK LPS Legacy · cold climate	22.4	12.5	10.4	12,800	215324876
D5FSOAH18XAK ARCOAIRE · cold climate	22.3	12.5	12.2	13,100	215324143
D5FSOAH18XAK COMFORTMAKER · cold climate	22.3	12.5	12.2	13,100	215324216
D5FSOAH18XAK DAY & NIGHT · cold climate	22.3	12.5	12.2	13,100	215324289
D5FSOAH18XAK HEIL · cold climate	22.3	12.5	12.2	13,100	215324362
D5FSOAH18XAK KEEPRITE · cold climate	22.3	12.5	12.2	13,100	215324435
D5FSOAH18XAK KENMORE · cold climate	22.3	12.5	12.2	13,100	215324508
D5FSOAH18XAK MIDEA · cold climate	22.3	12.5	12.2	13,100	215324581
D5FSOAH18XAK TEMPSTAR · cold climate	22.3	12.5	12.2	13,100	215324654
D5FSOAH18XAK SMART COMFORT · cold climate	22.3	12.5	12.2	13,100	215324727
D5FSOAH18XAK AIRQUEST · cold climate	22.3	12.5	12.2	13,100	215324800
D5FSOAH18XAK LPS Legacy · cold climate	22.3	12.5	12.2	13,100	215324873
D5FSCAH18XAK ARCOAIRE · cold climate	20.8	12.5	11.4	12,800	215324144
D5FSCAH18XAK COMFORTMAKER · cold climate	20.8	12.5	11.4	12,800	215324217
D5FSCAH18XAK DAY & NIGHT · cold climate	20.8	12.5	11.4	12,800	215324290
D5FSCAH18XAK HEIL · cold climate	20.8	12.5	11.4	12,800	215324363
D5FSCAH18XAK KEEPRITE · cold climate	20.8	12.5	11.4	12,800	215324436
D5FSCAH18XAK KENMORE · cold climate	20.8	12.5	11.4	12,800	215324509
D5FSCAH18XAK MIDEA · cold climate	20.8	12.5	11.4	12,800	215324582
D5FSCAH18XAK TEMPSTAR · cold climate	20.8	12.5	11.4	12,800	215324655
D5FSCAH18XAK SMART COMFORT · cold climate	20.8	12.5	11.4	12,800	215324728
D5FSCAH18XAK AIRQUEST · cold climate	20.8	12.5	11.4	12,800	215324801
D5FSCAH18XAK LPS Legacy · cold climate	20.8	12.5	11.4	12,800	215324874
D5FSDAH18XHK ARCOAIRE · cold climate	20.0	13.3	11.4	14,200	215324148
D5FSDAH18XHK COMFORTMAKER · cold climate	20.0	13.3	11.4	14,200	215324221
D5FSDAH18XHK DAY & NIGHT · cold climate	20.0	13.3	11.4	14,200	215324294
D5FSDAH18XHK HEIL · cold climate	20.0	13.3	11.4	14,200	215324367
D5FSDAH18XHK KEEPRITE · cold climate	20.0	13.3	11.4	14,200	215324440

Yearly running cost in 10 large cities$352-$862

Phoenix, AZ$424/yr
Miami, FL$353/yr
Houston, TX$379/yr
Atlanta, GA$369/yr
Los Angeles, CA$355/yr
New York, NY$862/yr
Chicago, IL$696/yr
Denver, CO$576/yr
Seattle, WA$352/yr
Minneapolis, MN$712/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 Arcoaire D5CSRAH18AAK?: The Arcoaire D5CSRAH18AAK is rated at up to 23.9 SEER2 and 12.5 EER2 for cooling and up to 13.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 89 certified matchups SEER2 ranges from 18.5-23.9.
Is the Arcoaire D5CSRAH18AAK good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 14,200 BTU/h at 5°F with a COP of 2.40, so it is still 2.4 times as efficient as electric resistance heat at that temperature.
How much does the Arcoaire D5CSRAH18AAK cost to run per year?: At its rated efficiency it costs about $352-$862 a year in electricity in large U.S. cities, depending on climate and local rates - for example $424 in Phoenix and $712 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 Arcoaire D5CSRAH18AAK?: ENERGY STAR lists 89 certified combinations for this outdoor unit. The highest-rated ones use ARCOAIRE D5FSFAH16XAK, COMFORTMAKER D5FSFAH16XAK, DAY & NIGHT D5FSFAH16XAK.
What refrigerant does the Arcoaire D5CSRAH18AAK use?: It uses R-454B.

Running cost and savings

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

Heat pump $414/yrYou save $514/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 Arcoaire D5CSRAH18AAK

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: $414
Current system, per year: $928
You save per year: $514
Payback: 13.6 years
Net after 10 years: -$1,863

Cooling $265Heating $149Electricity used: 2,590 kWhSaved vs. a minimum-efficiency heat pump: $297

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 18,000 BTU models

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MRCOOL AEPL**MHV22S1831B1A · cold climate24.0 SEER2 · 10.0 HSPF2
InfinityLiving EZ-18Z-M2B · cold climate23.9 SEER2 · 10.0 HSPF2
ZERO ZMSB-18HV-USHH · cold climate24.0 SEER2 · 10.5 HSPF2
MRCOOL DIY-MULTI3-18HP230D-O · cold climate23.9 SEER2 · 10.0 HSPF2
ZERO Z2SOV-18HDTB-US · cold climate24.0 SEER2 · 10.5 HSPF2
AC Pro MHPC-H-018BSB · cold climate23.8 SEER2 · 13.5 HSPF2

See all 465 18,000 BTU mini-splits, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of May 6, 2026. How we use the data.