What is the SEER2 rating of the Armstrong Air A7CP21V24P-**A?

The Armstrong Air A7CP21V24P-**A is rated at up to 21.0 SEER2 and 13.5 EER2 for cooling and up to 10.2 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 391 certified matchups SEER2 ranges from 15.2-21.0.

Is the Armstrong Air A7CP21V24P-**A good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 18,600 BTU/h at 5°F with a COP of 2.30, so it is still 2.3 times as efficient as electric resistance heat at that temperature.

How much does the Armstrong Air A7CP21V24P-**A cost to run per year?

At its rated efficiency it costs about $525-$1,500 a year in electricity in large U.S. cities, depending on climate and local rates - for example $661 in Phoenix and $1,263 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 Armstrong Air A7CP21V24P-**A?

ENERGY STAR lists 391 certified combinations for this outdoor unit. The highest-rated ones use 7EH24BX-**+TDR, 7AH2AV30PXC, 7AH2AV24PXC.

2-ton central heat pump · A7CP21V SERIES

Armstrong Air A7CP21V24P-**A

Excellent cooling and heating efficiency for a 2-ton central heat pump, and certified for cold climates.

Ranks #7 of 331 2 ton central heat pumps for cooling efficiency, and costs about $618 a year to run in a mixed climate like Atlanta.

SEER2: 21.0 Cooling efficiency over a season
Excellent · beats 97%
HSPF2: 10.2 Heating efficiency over a season
Excellent · beats 91%
EER2: 13.5 Cooling efficiency on a 95°F day
Excellent · beats 95%
Heat at 5°F: 18,600 BTU/h75% of its 47°F output
Very good · beats 88%

A good fit if…

You want low cooling bills - its SEER2 beats 97% of central heat pumps.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 18,600 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 91% 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

Specifications2 ton, R-454B

General
Brand	Armstrong Air
Also sold as	AIREASE, AC Pro
Outdoor unit model	A7CP21V24P-**A
Series	A7CP21V SERIES
Type	Central heat pump
Nominal size	2 ton
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	March 7, 2025
Last certified	September 30, 2026
Cooling
SEER2Seasonal efficiency, higher is better	21.0 (range 15.2-21.0)
EER2Efficiency at 95°F outdoors	11.2-13.5
Cooling capacity	21,600-24,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8-10.2
Capacity at 47°F	23,600-27,400 BTU/h
Capacity at 17°F	18,700-22,400 BTU/h
Capacity at 5°F	13,900-18,600 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.70-2.30
ENERGY STAR cold climate	Yes

Heating output as it gets colder75% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with 7EH24BX-**+TDR at the standard test temperatures, in BTU/h:

Certified matchups391 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 391 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.
7EH24BX-**+TDR · cold climate	A97UH1E030B12*	21.0	13.5	8.2	18,100	218788059
7EH24BX-**+TDR · cold climate	A97UH1E030B12*	21.0	13.5	8.2	18,100	218788051
7AH2AV30PXC · cold climate	-	20.5	12.0	10.0	17,900	217117577
7AH2AV30PXC · cold climate	-	20.5	12.0	10.0	17,900	217117581
7AH2AV24PXC · cold climate	-	20.5	13.0	10.0	18,600	217120427
7AH2AV24PXC · cold climate	-	20.5	13.0	10.0	18,600	217120501
7AH2AV30PXC · cold climate	-	20.5	12.0	10.0	17,900	217465738
7AH2AV24PXC · cold climate	-	20.5	13.0	10.0	18,600	217465740
7AH2AE30PX- · cold climate	-	20.5	13.0	9.8	17,900	217122218
7AH2AE30PX- · cold climate	-	20.5	13.0	9.8	17,900	217122117
7AH2AE24PX- · cold climate	-	20.5	13.0	9.8	18,600	217122118
7AH2AE24PX- · cold climate	-	20.5	13.0	9.8	18,600	217122219
7AH2AE30PX- · cold climate	-	20.5	13.0	9.8	17,900	217465952
7AH2AE24PX- · cold climate	-	20.5	13.0	9.8	18,600	217465953
7EH30AX-**+TDR	A80UH2E045A12*	20.5	12.5	9.0	16,700	217446235
7EH30AX-**+TDR	A80UH2E045A12*	20.5	12.5	9.0	16,700	217446466
7EH30AX-**+TDR	A80UH2E045A12*	20.5	12.5	9.0	16,700	217466040
7AH1AV30PX- · cold climate	-	20.5	13.0	8.5	17,800	217122217
7AH1AV30PX- · cold climate	-	20.5	13.0	8.5	17,800	217122116
7AH1AV30PX- · cold climate	-	20.5	13.0	8.5	17,800	217465951
7E[C,U]30BX-**+TDR · cold climate	A97US2V040B12X*	20.0	12.8	10.0	17,700	217120435
7E[C,U]30BX-**+TDR · cold climate	A97US2V040B12X*	20.0	12.8	10.0	17,700	217120509
7E[C,U]30BX-**+TDR · cold climate	A97US2V040B12X*	20.0	12.8	10.0	17,700	217465748
7E[C,U]30AX-**+TDR · cold climate	A80UH1E060A12X*	20.0	12.6	9.8	17,600	217122050
7E[C,U]30AX-**+TDR · cold climate	A80UH1E040A12X*	20.0	12.6	9.8	17,600	217122049
7E[C,U]30AX-**+TDR · cold climate	A80UH1E060A12X*	20.0	12.6	9.8	17,600	217122151
7E[C,U]30AX-**+TDR · cold climate	A80UH1E040A12X*	20.0	12.6	9.8	17,600	217122150
7AH1AV24PX-	-	20.0	13.0	9.8	17,300	217446196
7AH1AV24PX-	-	20.0	13.0	9.8	17,300	217446427
7E[C,U]30AX-**+TDR · cold climate	A80UH1E040A12X*	20.0	12.6	9.8	17,600	217465884
7E[C,U]30AX-**+TDR · cold climate	A80UH1E060A12X*	20.0	12.6	9.8	17,600	217465885
7AH1AV24PX-	-	20.0	13.0	9.8	17,300	217466001
7EH30BX-**+TDR · cold climate	A97US2V060B12X*	20.0	13.0	9.4	17,100	217446223
7EH30BX-**+TDR · cold climate	A80US2V090B12*	20.0	13.0	9.4	17,000	217446451
7EH30BX-**+TDR · cold climate	A98USMV070B12S*	20.0	13.0	9.4	17,000	217446224
7EH30BX-**+TDR · cold climate	A80US2V090B12*	20.0	13.0	9.4	17,000	217446220
7EH30BX-**+TDR · cold climate	A97US2V040B12X*	20.0	13.0	9.4	17,100	217446222
7EH30BX-**+TDR	A97US2V070B12S*	20.0	13.0	9.4	17,000	217446229
7EH30BX-**+TDR · cold climate	A97US2V040B12X*	20.0	13.0	9.4	17,100	217446453
7EH30BX-**+TDR · cold climate	A97US2V060B12X*	20.0	13.0	9.4	17,100	217446454
7EH30BX-**+TDR · cold climate	A98USMV070B12S*	20.0	13.0	9.4	17,000	217446455
7EH30BX-**+TDR	A97US2V070B12S*	20.0	13.0	9.4	17,000	217446460
7EH30BX-**+TDR · cold climate	A80US2V090B12*	20.0	13.0	9.4	17,000	217466025
7EH30BX-**+TDR · cold climate	A97US2V040B12X*	20.0	13.0	9.4	17,100	217466027
7EH30BX-**+TDR · cold climate	A97US2V060B12X*	20.0	13.0	9.4	17,100	217466028
7EH30BX-**+TDR · cold climate	A98USMV070B12S*	20.0	13.0	9.4	17,000	217466029
7EH30BX-**+TDR	A97US2V070B12S*	20.0	13.0	9.4	17,000	217466034
7EH30AX-**+TDR	A80US2V060A12X*	20.0	12.5	9.0	17,100	217446238
7EH30AX-**+TDR	A80US2V060A12X*	20.0	12.5	9.0	17,100	217446469
7EH30AX-**+TDR	A80US2V060A12X*	20.0	12.5	9.0	17,100	217466043
7ED30/36BX-**+TDR	A80DS2V090B16*	20.0	12.5	8.5	16,300	217446204
7ED30/36BX-**+TDR	A97DS2V045B12S*	20.0	12.5	8.5	16,200	217446205
7ED30/36BX-**+TDR	A80DS2V090B16*	20.0	12.5	8.5	16,300	217446435
7ED30/36BX-**+TDR	A97DS2V045B12S*	20.0	12.5	8.5	16,200	217446436
7ED30/36BX-**+TDR	A97DSMV070B12S*	20.0	12.5	8.5	16,300	217446437
7ED30/36BX-**+TDR	A97DSMV070B12S*	20.0	12.5	8.5	16,300	217446206
7EH24AX-**+TDR · cold climate	A80UH1E040A12X*	20.0	13.0	8.5	17,500	217446230
7EH24AX-**+TDR · cold climate	A80UH1E060A12X*	20.0	13.0	8.5	17,500	217446231
7EH24AX-**+TDR · cold climate	A80UH2E070A12*	20.0	13.0	8.5	17,600	217446232
7EH24AX-**+TDR · cold climate	A80UH1E040A12X*	20.0	13.0	8.5	17,500	217446461

Yearly running cost in 10 large cities$525-$1,500

Phoenix, AZ$661/yr
Miami, FL$525/yr
Houston, TX$593/yr
Atlanta, GA$618/yr
Los Angeles, CA$606/yr
New York, NY$1,500/yr
Chicago, IL$1,222/yr
Denver, CO$1,019/yr
Seattle, WA$629/yr
Minneapolis, MN$1,263/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 Armstrong Air A7CP21V24P-**A?: The Armstrong Air A7CP21V24P-**A is rated at up to 21.0 SEER2 and 13.5 EER2 for cooling and up to 10.2 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 391 certified matchups SEER2 ranges from 15.2-21.0.
Is the Armstrong Air A7CP21V24P-**A good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 18,600 BTU/h at 5°F with a COP of 2.30, so it is still 2.3 times as efficient as electric resistance heat at that temperature.
How much does the Armstrong Air A7CP21V24P-**A cost to run per year?: At its rated efficiency it costs about $525-$1,500 a year in electricity in large U.S. cities, depending on climate and local rates - for example $661 in Phoenix and $1,263 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 Armstrong Air A7CP21V24P-**A?: ENERGY STAR lists 391 certified combinations for this outdoor unit. The highest-rated ones use 7EH24BX-**+TDR, 7AH2AV30PXC, 7AH2AV24PXC.
What refrigerant does the Armstrong Air A7CP21V24P-**A 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 $662/yrYou save $564/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 Armstrong Air A7CP21V24P-**A

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: $662
Current system, per year: $1,226
You save per year: $564
Payback: 16.0 years
Net after 10 years: -$3,361

Cooling $392Heating $270Electricity used: 4,140 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.

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GE NS22H24MA4-**A22.0 SEER2 · 9.5 HSPF2
LG KUSXB241A · cold climate21.0 SEER2 · 10.2 HSPF2
Trane 5TWV0X24A1 · cold climate22.4 SEER2 · 10.0 HSPF2
Daikin DH9VSA241CA · cold climate21.0 SEER2 · 10.0 HSPF2
Lennox SL25XPV-024-230A · cold climate22.8 SEER2 · 9.2 HSPF2
Friedrich FRP19AY24AJVC · cold climate21.0 SEER2 · 10.0 HSPF2

See all 331 2 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of September 30, 2026. How we use the data.