What is the SEER2 rating of the Arcoaire D5CUHAH18AAK?

The Arcoaire D5CUHAH18AAK is rated at up to 19.3 SEER2 and 12.1 EER2 for cooling and up to 10.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 77 certified matchups SEER2 ranges from 15.5-19.3.

Is the Arcoaire D5CUHAH18AAK good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 19,600 BTU/h at 5°F with a COP of 2.12, so it is still 2.1 times as efficient as electric resistance heat at that temperature.

How much does the Arcoaire D5CUHAH18AAK cost to run per year?

At its rated efficiency it costs about $438-$1,123 a year in electricity in large U.S. cities, depending on climate and local rates - for example $533 in Phoenix and $933 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 D5CUHAH18AAK?

ENERGY STAR lists 77 certified combinations for this outdoor unit. The highest-rated ones use D5MUWAQ18XA3, D5FUHAH24XAK, D5FUAAH18XAK.

1.5-ton central heat pump · D5F Series

Arcoaire D5CUHAH18AAK

Very good cooling efficiency and excellent heating efficiency for a 1.5-ton central heat pump, and certified for cold climates.

Ranks #5 of 170 1.5 ton central heat pumps for cooling efficiency, and costs about $474 a year to run in a mixed climate like Atlanta.

SEER2: 19.3 Cooling efficiency over a season
Very good · beats 89%
HSPF2: 10.8 Heating efficiency over a season
Excellent · beats 98%
EER2: 12.1 Cooling efficiency on a 95°F day
Very good · beats 74%
Heat at 5°F: 19,600 BTU/h103% of its 47°F output
Average · beats 65%

A good fit if…

You want low cooling bills - its SEER2 beats 89% of central heat pumps.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 19,600 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 98% of central heat pumps.
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

Specifications1.5 ton, R-454B

General
Brand	Arcoaire
Also sold as	Keeprite, Comfortmaker, Day & Night, Tempstar, Smart Comfort, Airquest, Heil, Midea, Kenmore, LPS Legacy, Grandaire, Viessmann, Bryant, Payne, WeatherMaker, Carrier
Outdoor unit model	D5CUHAH18AAK
Series	D5F Series
Type	Central heat pump
Nominal size	1.5 ton
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	July 14, 2026
Cooling
SEER2Seasonal efficiency, higher is better	19.3 (range 15.5-19.3)
EER2Efficiency at 95°F outdoors	11.5-12.5
Cooling capacity	18,000-18,400 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	9.5-10.8
Capacity at 47°F	18,000-20,400 BTU/h
Capacity at 17°F	14,700-15,400 BTU/h
Capacity at 5°F	18,000-19,600 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.98-2.12
ENERGY STAR cold climate	Yes

Heating output as it gets colder103% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with D5MUWAQ18XA3 at the standard test temperatures, in BTU/h:

Certified matchups77 indoor units

The same outdoor unit scores differently with each indoor unit. The 60 highest-rated of 77 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.
D5MUWAQ18XA3 · cold climate	19.3	12.1	10.8	19,600	217730630
D5MUWAQ18XA3 · cold climate	19.3	12.1	10.8	19,600	217730646
D5MUWAQ18XA3 · cold climate	19.3	12.1	10.8	19,600	217730662
D5MUWAQ18XA3 · cold climate	19.3	12.1	10.8	19,600	217730678
D5MUWAQ18XA3 · cold climate	19.3	12.1	10.8	19,600	217730614
D5MUWAQ18XA3 · cold climate	19.3	12.1	10.8	19,600	218213796
D5MUWAQ18XA3 · cold climate	19.3	12.1	10.8	19,600	218213790
D5MUWAQ18XA3 · cold climate	19.3	12.1	10.8	19,600	218213784
D5MUWAQ18XA3 · cold climate	19.3	12.1	10.8	19,600	218213778
D5MUWAQ18XA3 · cold climate	19.3	12.1	10.8	19,600	218213772
D5MUWAQ18XA3 · cold climate	19.3	12.1	10.8	19,600	218213766
D5MUWAQ18XA3 · cold climate	19.3	12.1	10.8	19,600	218213760
D5MUWAQ18XA3 · cold climate	19.3	12.1	10.8	19,600	218213754
D5MUWAQ18XA3 · cold climate	19.3	12.1	10.8	19,600	218213748
D5MUWAQ18XA3 · cold climate	19.3	12.1	10.8	19,600	218213742
D5MUWAQ18XA3 · cold climate	19.3	12.1	10.8	19,600	218213736
D5MUWAQ18XA3 · cold climate	19.3	12.1	10.8	19,600	218668521
D5FUHAH24XAK · cold climate	19.0	12.5	10.2	18,600	215319069
D5FUHAH24XAK · cold climate	19.0	12.5	10.2	18,600	215318901
D5FUHAH24XAK · cold climate	19.0	12.5	10.2	18,600	215319013
D5FUHAH24XAK · cold climate	19.0	12.5	10.2	18,600	215319097
D5FUHAH24XAK · cold climate	19.0	12.5	10.2	18,600	215319125
D5FUHAH24XAK · cold climate	19.0	12.5	10.2	18,600	215319153
D5FUHAH24XAK · cold climate	19.0	12.5	10.2	18,600	215319209
D5FUHAH24XAK · cold climate	19.0	12.5	10.2	18,600	215318929
D5FUHAH24XAK · cold climate	19.0	12.5	10.2	18,600	215318957
D5FUHAH24XAK · cold climate	19.0	12.5	10.2	18,600	215318985
D5FUHAH24XAK · cold climate	19.0	12.5	10.2	18,600	215319041
D5FUHAH24XAK · cold climate	19.0	12.5	10.2	18,600	215319181
D5FUHAH24XAK · cold climate	19.0	12.5	10.2	18,600	217178772
D5FUAAH18XAK · cold climate	19.0	12.5	9.8	18,000	215319055
D5FUAAH18XAK · cold climate	19.0	12.5	9.8	18,000	215318887
D5FUAAH18XAK · cold climate	19.0	12.5	9.8	18,000	215318999
D5FUAAH18XAK · cold climate	19.0	12.5	9.8	18,000	215318915
D5FUAAH18XAK · cold climate	19.0	12.5	9.8	18,000	215318943
D5FUAAH18XAK · cold climate	19.0	12.5	9.8	18,000	215319027
D5FUAAH18XAK · cold climate	19.0	12.5	9.8	18,000	215319167
D5FUAAH18XAK · cold climate	19.0	12.5	9.8	18,000	215319139
D5FUAAH18XAK · cold climate	19.0	12.5	9.8	18,000	215319195
D5FUAAH18XAK · cold climate	19.0	12.5	9.8	18,000	215318971
D5FUAAH18XAK · cold climate	19.0	12.5	9.8	18,000	215319083
D5FUAAH18XAK · cold climate	19.0	12.5	9.8	18,000	215319111
D5FUAAH18XAK · cold climate	19.0	12.5	9.8	18,000	217178763
D5FULAH24XBX · cold climate	16.1	11.7	9.5	18,000	217456521
D5FULAH24XAX · cold climate	16.1	11.7	9.5	18,000	217456744
D5FULAH24XAX · cold climate	16.1	11.7	9.5	18,000	217456436
D5FULAH24XBX · cold climate	16.1	11.7	9.5	18,000	217456437
D5FULAH24XAX · cold climate	16.1	11.7	9.5	18,000	217456660
D5FULAH24XBX · cold climate	16.1	11.7	9.5	18,000	217456661
D5FULAH24XAX · cold climate	16.1	11.7	9.5	18,000	217456576
D5FULAH24XBX · cold climate	16.1	11.7	9.5	18,000	217456577
D5FULAH24XAX · cold climate	16.1	11.7	9.5	18,000	217456632
D5FULAH24XBX · cold climate	16.1	11.7	9.5	18,000	217456633
D5FULAH24XAX · cold climate	16.1	11.7	9.5	18,000	217456716
D5FULAH24XBX · cold climate	16.1	11.7	9.5	18,000	217456717
D5FULAH24XAX · cold climate	16.1	11.7	9.5	18,000	217456772
D5FULAH24XBX · cold climate	16.1	11.7	9.5	18,000	217456773
D5FULAH24XAX · cold climate	16.1	11.7	9.5	18,000	217456688
D5FULAH24XBX · cold climate	16.1	11.7	9.5	18,000	217456689
D5FULAH24XBX · cold climate	16.1	11.7	9.5	18,000	217456605

Yearly running cost in 10 large cities$438-$1,123

Phoenix, AZ$533/yr
Miami, FL$438/yr
Houston, TX$477/yr
Atlanta, GA$474/yr
Los Angeles, CA$460/yr
New York, NY$1,123/yr
Chicago, IL$910/yr
Denver, CO$755/yr
Seattle, WA$462/yr
Minneapolis, MN$933/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 D5CUHAH18AAK?: The Arcoaire D5CUHAH18AAK is rated at up to 19.3 SEER2 and 12.1 EER2 for cooling and up to 10.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 77 certified matchups SEER2 ranges from 15.5-19.3.
Is the Arcoaire D5CUHAH18AAK good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 19,600 BTU/h at 5°F with a COP of 2.12, so it is still 2.1 times as efficient as electric resistance heat at that temperature.
How much does the Arcoaire D5CUHAH18AAK cost to run per year?: At its rated efficiency it costs about $438-$1,123 a year in electricity in large U.S. cities, depending on climate and local rates - for example $533 in Phoenix and $933 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 D5CUHAH18AAK?: ENERGY STAR lists 77 certified combinations for this outdoor unit. The highest-rated ones use D5MUWAQ18XA3, D5FUHAH24XAK, D5FUAAH18XAK.
What refrigerant does the Arcoaire D5CUHAH18AAK 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 $525/yrYou save $419/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 D5CUHAH18AAK

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: $525
Current system, per year: $944
You save per year: $419
Payback: 16.7 years
Net after 10 years: -$2,808

Cooling $328Heating $197Electricity used: 3,283 kWhSaved vs. a minimum-efficiency heat pump: $201

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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Breeze33 BZ33-INV18OUT2-J · cold climate19.3 SEER2 · 10.8 HSPF2
ACIQ ACIQ-18-HPD · cold climate19.3 SEER2 · 10.8 HSPF2
Carrier 37MUHAQ18AA3 · cold climate19.3 SEER2 · 10.8 HSPF2
LG KUSXB181A · cold climate20.5 SEER2 · 10.0 HSPF2
Comfort-Aire A-VXP18SA-1 · cold climate19.3 SEER2 · 10.8 HSPF2
Atomi Smart AT224021.2 SEER2 · 8.9 HSPF2
ComfortStar CPH3-18CD(O) · cold climate19.3 SEER2 · 10.8 HSPF2

See all 170 1.5 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of July 14, 2026. How we use the data.