What is the SEER2 rating of the Day & Night D5CUHAH30AAK?

The Day & Night D5CUHAH30AAK is rated at up to 17.5 SEER2 and 11.7 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 82 certified matchups SEER2 ranges from 15.3-17.5.

Is the Day & Night D5CUHAH30AAK good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 33,200 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.

How much does the Day & Night D5CUHAH30AAK cost to run per year?

At its rated efficiency it costs about $783-$1,926 a year in electricity in large U.S. cities, depending on climate and local rates - for example $958 in Phoenix and $1,586 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 Day & Night D5CUHAH30AAK?

ENERGY STAR lists 82 certified combinations for this outdoor unit. The highest-rated ones use D5MUWAQ30XA3, D5FUHAH36XAK, D5FUAAH30XAK.

2.5-ton central heat pump · D5F Series

Day & Night D5CUHAH30AAK

Average cooling efficiency and excellent heating efficiency for a 2.5-ton central heat pump, and certified for cold climates.

Ranks #63 of 199 2.5 ton central heat pumps for cooling efficiency, and costs about $827 a year to run in a mixed climate like Atlanta.

SEER2: 17.5 Cooling efficiency over a season
Average · beats 58%
HSPF2: 10.8 Heating efficiency over a season
Excellent · beats 98%
EER2: 11.7 Cooling efficiency on a 95°F day
Average · beats 43%
Heat at 5°F: 33,200 BTU/h100% of its 47°F output
Below average · beats 39%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 33,200 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.
You want a choice of indoor units - 82 certified pairings.

Think twice if…

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

Calculate my running cost

Details

Specifications2.5 ton, R-454B

General
Brand	Day & Night
Also sold as	Smart Comfort, Midea, Arcoaire, Heil, Keeprite, Comfortmaker, Kenmore, Tempstar, Airquest, LPS Legacy, Grandaire, Viessmann, Carrier, Bryant, Payne, WeatherMaker
Outdoor unit model	D5CUHAH30AAK
Series	D5F Series
Type	Central heat pump
Nominal size	2.5 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	17.5 (range 15.3-17.5)
EER2Efficiency at 95°F outdoors	10.0-12.1
Cooling capacity	29,000-30,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	9.3-10.8
Capacity at 47°F	30,000-34,000 BTU/h
Capacity at 17°F	23,200-25,000 BTU/h
Capacity at 5°F	30,400-33,200 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.80-2.00
ENERGY STAR cold climate	Yes

Heating output as it gets colder100% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with D5MUWAQ30XA3 at the standard test temperatures, in BTU/h:

Certified matchups82 indoor units

The same outdoor unit scores differently with each indoor unit. The 60 highest-rated of 82 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.
D5MUWAQ30XA3 · cold climate	17.5	11.7	10.2	32,000	217730618
D5MUWAQ30XA3 · cold climate	17.5	11.7	10.2	32,000	217730634
D5MUWAQ30XA3 · cold climate	17.5	11.7	10.2	32,000	217730650
D5MUWAQ30XA3 · cold climate	17.5	11.7	10.2	32,000	217730666
D5MUWAQ30XA3 · cold climate	17.5	11.7	10.2	32,000	217730682
D5MUWAQ30XA3 · cold climate	17.5	11.7	10.2	32,000	218213798
D5MUWAQ30XA3 · cold climate	17.5	11.7	10.2	32,000	218213792
D5MUWAQ30XA3 · cold climate	17.5	11.7	10.2	32,000	218213786
D5MUWAQ30XA3 · cold climate	17.5	11.7	10.2	32,000	218213780
D5MUWAQ30XA3 · cold climate	17.5	11.7	10.2	32,000	218213774
D5MUWAQ30XA3 · cold climate	17.5	11.7	10.2	32,000	218213768
D5MUWAQ30XA3 · cold climate	17.5	11.7	10.2	32,000	218213762
D5MUWAQ30XA3 · cold climate	17.5	11.7	10.2	32,000	218213756
D5MUWAQ30XA3 · cold climate	17.5	11.7	10.2	32,000	218213750
D5MUWAQ30XA3 · cold climate	17.5	11.7	10.2	32,000	218213744
D5MUWAQ30XA3 · cold climate	17.5	11.7	10.2	32,000	218213738
D5MUWAQ30XA3 · cold climate	17.5	11.7	10.2	32,000	218668523
D5FUHAH36XAK · cold climate	17.2	12.1	10.8	33,200	215318958
D5FUHAH36XAK · cold climate	17.2	12.1	10.8	33,200	215319070
D5FUHAH36XAK · cold climate	17.2	12.1	10.8	33,200	215318902
D5FUHAH36XAK · cold climate	17.2	12.1	10.8	33,200	215318986
D5FUHAH36XAK · cold climate	17.2	12.1	10.8	33,200	215319014
D5FUHAH36XAK · cold climate	17.2	12.1	10.8	33,200	215318930
D5FUHAH36XAK · cold climate	17.2	12.1	10.8	33,200	215319042
D5FUHAH36XAK · cold climate	17.2	12.1	10.8	33,200	215319098
D5FUHAH36XAK · cold climate	17.2	12.1	10.8	33,200	215319126
D5FUHAH36XAK · cold climate	17.2	12.1	10.8	33,200	215319182
D5FUHAH36XAK · cold climate	17.2	12.1	10.8	33,200	215319210
D5FUHAH36XAK · cold climate	17.2	12.1	10.8	33,200	215319154
D5FUHAH36XAK · cold climate	17.2	12.1	10.8	33,200	217178773
D5FUAAH30XAK · cold climate	16.9	11.7	10.0	32,600	215319114
D5FUAAH30XAK · cold climate	16.9	11.7	10.0	32,600	215319058
D5FUAAH30XAK · cold climate	16.9	11.7	10.0	32,600	215318890
D5FUAAH30XAK · cold climate	16.9	11.7	10.0	32,600	215319002
D5FUAAH30XAK · cold climate	16.9	11.7	10.0	32,600	215318918
D5FUAAH30XAK · cold climate	16.9	11.7	10.0	32,600	215318946
D5FUAAH30XAK · cold climate	16.9	11.7	10.0	32,600	215319030
D5FUAAH30XAK · cold climate	16.9	11.7	10.0	32,600	215319086
D5FUAAH30XAK · cold climate	16.9	11.7	10.0	32,600	215319142
D5FUAAH30XAK · cold climate	16.9	11.7	10.0	32,600	215319170
D5FUAAH30XAK · cold climate	16.9	11.7	10.0	32,600	215318974
D5FUAAH30XAK · cold climate	16.9	11.7	10.0	32,600	215319198
D5FUAAH30XAK · cold climate	16.9	11.7	10.0	32,600	217178766
D5FULAH36XBX · cold climate	16.0	11.0	9.6	32,000	217456693
D5FULAH36XCX · cold climate	16.0	11.0	9.6	32,000	217456694
D5FULAH36XBX · cold climate	16.0	11.0	9.6	32,000	217456525
D5FULAH36XCX · cold climate	16.0	11.0	9.6	32,000	217456526
D5FULAH36XBX · cold climate	16.0	11.0	9.6	32,000	217456497
D5FULAH36XCX · cold climate	16.0	11.0	9.6	32,000	217456498
D5FULAH36XBX · cold climate	16.0	11.0	9.6	32,000	217456637
D5FULAH36XBX · cold climate	16.0	11.0	9.6	32,000	217456776
D5FULAH36XCX · cold climate	16.0	11.0	9.6	32,000	217456777
D5FULAH36XBX · cold climate	16.0	11.0	9.6	32,000	217456609
D5FULAH36XCX · cold climate	16.0	11.0	9.6	32,000	217456610
D5FULAH36XBX · cold climate	16.0	11.0	9.6	32,000	217456665
D5FULAH36XCX · cold climate	16.0	11.0	9.6	32,000	217456666
D5FULAH36XBX · cold climate	16.0	11.0	9.6	32,000	217456749
D5FULAH36XBX · cold climate	16.0	11.0	9.6	32,000	217456581
D5FULAH36XCX · cold climate	16.0	11.0	9.6	32,000	217456582
D5FULAH36XBX · cold climate	16.0	11.0	9.6	32,000	217456441

Yearly running cost in 10 large cities$783-$1,926

Phoenix, AZ$958/yr
Miami, FL$802/yr
Houston, TX$858/yr
Atlanta, GA$827/yr
Los Angeles, CA$795/yr
New York, NY$1,926/yr
Chicago, IL$1,554/yr
Denver, CO$1,284/yr
Seattle, WA$783/yr
Minneapolis, MN$1,586/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 Day & Night D5CUHAH30AAK?: The Day & Night D5CUHAH30AAK is rated at up to 17.5 SEER2 and 11.7 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 82 certified matchups SEER2 ranges from 15.3-17.5.
Is the Day & Night D5CUHAH30AAK good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 33,200 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
How much does the Day & Night D5CUHAH30AAK cost to run per year?: At its rated efficiency it costs about $783-$1,926 a year in electricity in large U.S. cities, depending on climate and local rates - for example $958 in Phoenix and $1,586 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 Day & Night D5CUHAH30AAK?: ENERGY STAR lists 82 certified combinations for this outdoor unit. The highest-rated ones use D5MUWAQ30XA3, D5FUHAH36XAK, D5FUAAH30XAK.
What refrigerant does the Day & Night D5CUHAH30AAK 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 $935/yrYou save $644/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 Day & Night D5CUHAH30AAK

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: $935
Current system, per year: $1,580
You save per year: $644
Payback: 17.8 years
Net after 10 years: -$5,057

Cooling $603Heating $332Electricity used: 5,846 kWhSaved vs. a minimum-efficiency heat pump: $281

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 2.5 ton models

Cooper&Hunter CH-PQ33-230VO · cold climate17.5 SEER2 · 10.8 HSPF2
Innovair SHV30H2BA · cold climate17.5 SEER2 · 10.8 HSPF2
ComfortStar CPH3-30CD(O) · cold climate17.5 SEER2 · 10.8 HSPF2
Mainline ML30HP230LMNTH-O · cold climate17.5 SEER2 · 10.8 HSPF2
Carrier 37MUHAQ30AA3 · cold climate17.5 SEER2 · 10.8 HSPF2
MDV MOD30-30HFN10-M3X · cold climate17.5 SEER2 · 10.8 HSPF2
AI AIR CONDITIONING AUO19-30N2-M3H · cold climate17.5 SEER2 · 10.8 HSPF2
Midea MO1HE-H30B-2A · cold climate17.5 SEER2 · 10.8 HSPF2

See all 199 2.5 ton central heat pumps, ranked

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