What is the SEER2 rating of the GE NS21H24MA5-**A?

The GE NS21H24MA5-**A is rated at up to 20.5 SEER2 and 13.0 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 91 certified matchups SEER2 ranges from 15.2-20.5.

Is the GE NS21H24MA5-**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 GE NS21H24MA5-**A cost to run per year?

At its rated efficiency it costs about $537-$1,496 a year in electricity in large U.S. cities, depending on climate and local rates - for example $671 in Phoenix and $1,256 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 GE NS21H24MA5-**A?

ENERGY STAR lists 91 certified combinations for this outdoor unit. The highest-rated ones use NAM24V2TA5*-, NCHC30AT5*-**+TDR, NAM30V1TA5*-.

2-ton central heat pump · NS21H Series

GE NS21H24MA5-**A

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

Ranks #19 of 331 2 ton central heat pumps for cooling efficiency, and costs about $620 a year to run in a mixed climate like Atlanta.

SEER2: 20.5 Cooling efficiency over a season
Excellent · beats 96%
HSPF2: 10.2 Heating efficiency over a season
Excellent · beats 91%
EER2: 13.0 Cooling efficiency on a 95°F day
Very good · beats 89%
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 96% 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	GE
Outdoor unit model	NS21H24MA5-**A
Series	NS21H 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	August 5, 2025
Last certified	September 30, 2026
Cooling
SEER2Seasonal efficiency, higher is better	20.5 (range 15.2-20.5)
EER2Efficiency at 95°F outdoors	11.2-13.4
Cooling capacity	21,600-24,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.2-10.2
Capacity at 47°F	24,000-27,400 BTU/h
Capacity at 17°F	18,800-22,400 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 NAM24V2TA5*- at the standard test temperatures, in BTU/h:

Certified matchups91 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 91 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.
NAM24V2TA5*- · cold climate	-	20.5	13.0	10.0	18,600	217642426
NCHC30AT5-*+TDR	NF80U045T3A*	20.5	12.5	9.0	16,700	217642627
NAM30V1TA5*- · cold climate	-	20.5	13.0	8.5	17,800	217642558
NCU[C,U]30BT5-*+TDR · cold climate	NF97X040V3B*	20.0	12.8	10.0	17,700	217642429
NCU[C,U]30AT5-*+TDR · cold climate	NF80X040S3A*	20.0	12.6	9.8	17,600	217642507
NAM24V1TA5*-	-	20.0	13.0	9.8	17,300	217642601
NCU[C,U]30AT5-*+TDR · cold climate	NF80X060S3A*	20.0	12.6	9.8	17,600	217642508
NCHC30BT5-*+TDR · cold climate	NF97X040V3B*	20.0	13.0	9.4	17,100	217642619
NCHC30BT5-*+TDR · cold climate	NF97X060V3B*	20.0	13.0	9.4	17,100	217642620
NCHC30BT5-*+TDR · cold climate	NF98U070M3B*	20.0	13.0	9.4	17,000	217642621
NCHC30AT5-*+TDR	NF80X060V3A*	20.0	12.5	9.0	17,100	217642631
NCDC36BT5-*+TDR	NF97D070M3B*	20.0	12.5	8.5	16,300	217642606
NCHC24AT5-*+TDR · cold climate	NF80X040S3A*	20.0	13.0	8.5	17,500	217642622
NCHC24AT5-*+TDR · cold climate	NF80X060S3A*	20.0	13.0	8.5	17,500	217642623
NCHC24AT5-*+TDR · cold climate	NF80U070T3A*	20.0	13.0	8.5	17,600	217642624
NAM24E1TA5*-	-	19.5	13.0	10.2	17,300	217642602
NCU[C,U]30AT5-*+TDR · cold climate	NF80X060V3A*	19.5	13.0	10.0	17,600	217642427
NCU[C,U]30BT5-*+TDR · cold climate	NF97X060V3B*	19.5	12.8	9.8	17,700	217642430
NCU[C,U]30AT5-*+TDR · cold climate	NF80U045T3A*	19.5	13.0	9.8	17,300	217642511
NCU[C,U]30AT5-*+TDR · cold climate	NF80U070T3A*	19.5	12.6	9.8	17,700	217642512
NCU[C,U]30BT5-*+TDR · cold climate	NF97U045V3B*	19.5	12.8	9.5	17,400	217642520
NCHC30BT5-*+TDR · cold climate	NF97U045V3B*	19.5	13.0	9.0	16,900	217642617
NCHC30BT5-*+TDR · cold climate	NF80X080V4B*	19.5	13.0	9.0	17,200	217642618
NCHC30AT5-*+TDR	NF80U070T3A*	19.5	12.0	9.0	17,200	217642628
NCU[C,U]24BT5-*+TDR	NF97X040V3B*	19.5	13.0	8.5	14,200	217642578
NCDC36CT5-*+TDR	NF97D090M4C*	19.5	12.5	8.5	16,200	217642609
NCU[C,U]24AT5-*+TDR	NF80U045T3A*	19.5	13.0	8.2	13,900	217642567
NCU[C,U]24BT5-*+TDR	NF97U070V3B*	19.5	13.4	8.2	14,000	217901789
NCDC36BT5-*+TDR	NF97D070V4B*	19.5	12.0	8.2	16,400	217901793
NCU[C,U]30BT5-*+TDR · cold climate	NF80X080V4B*	19.0	12.6	9.8	17,700	217642428
NCU[C,U]30BT5-*+TDR · cold climate	NF98U070M3B*	19.0	12.8	9.8	17,600	217642431
NCU[C,U]30AT5-*+TDR · cold climate	NF80U070S3A*	19.0	13.0	9.8	17,500	217642514
NCU[C,U]30BT5-*+TDR · cold climate	NF80U070S3B*	19.0	13.0	9.8	17,400	217642515
NCU[C,U]30AT5-*+TDR · cold climate	NF80L070S3A*	19.0	13.0	9.8	17,400	217642516
NCU[C,U]30BT5-*+TDR · cold climate	NF96U070S3B*	19.0	12.8	9.8	17,700	217642519
NCU[C,U]30BT5-*+TDR · cold climate	NF80L070S3B*	19.0	13.0	9.8	17,400	217642517
NCU[C,U]30BT5-*+TDR · cold climate	NF97U070T3B*	19.0	12.4	9.8	17,800	218159759
NCHC30BT5-*+TDR · cold climate	NF80U070S3B*	19.0	13.0	9.0	16,900	217642612
NCHC30BT5-*+TDR · cold climate	NF80L070S3B*	19.0	13.0	9.0	16,900	217642614
NCHC30AT5-*+TDR	NF80U070V3A*	19.0	12.6	9.0	17,000	217901795
NCU[C,U]24AT5-*+TDR	NF80X060V3A*	19.0	13.0	8.5	14,200	217642593
NCU[C,U]24BT5-*+TDR	NF98U070M3B*	19.0	13.0	8.5	14,200	217642596
NCU[C,U]24AT5-*+TDR	NF80X040S3A*	19.0	13.0	8.5	14,200	217642565
NCU[C,U]24AT5-*+TDR	NF80X060S3A*	19.0	13.0	8.5	14,200	217642566
NCU[C,U]24AT5-*+TDR	NF80U070T3A*	19.0	13.0	8.5	14,300	217642568
NCU[C,U]24BT5-*+TDR	NF97X060V3B*	19.0	13.0	8.5	14,300	217642579
NCU[C,U]24BT5-*+TDR	NF97U045V3B*	19.0	13.0	8.2	14,000	217642576
NCU[C,U]24BT5-*+TDR	NF80U090V4B*	19.0	13.2	8.2	14,100	217901788
NCU[C,U]30BT5-*+TDR · cold climate	NF95X040S3B*	18.5	12.4	9.8	17,800	217642509
NCU[C,U]30BT5-*+TDR · cold climate	NF95X060S3B*	18.5	12.4	9.8	17,800	217642510
NCU[C,U]30BT5-*+TDR · cold climate	NF96U045S3B*	18.5	12.4	9.8	17,800	217642518
NCU[C,U]30BT5-*+TDR · cold climate	NF97U045T3B*	18.5	12.4	9.8	17,800	218159756
NCHC30BT5-*+TDR · cold climate	NF95X040S3B*	18.5	12.5	9.0	17,200	217642607
NCHC30BT5-*+TDR · cold climate	NF95X060S3B*	18.5	12.5	9.0	17,200	217642608
NCHC30BT5-*+TDR · cold climate	NF96U045S3B*	18.5	12.5	9.0	17,300	217642615
NCHC30BT5-*+TDR · cold climate	NF96U070S3B*	18.5	13.0	9.0	17,100	217642616
NCHC30AT5-*+TDR	NF80X040S3A*	18.5	12.0	9.0	17,100	217642625
NCHC30AT5-*+TDR	NF80X060S3A*	18.5	12.0	9.0	17,100	217642626
NCHC30AT5-*+TDR	NF80L070S3A*	18.5	12.5	9.0	16,800	217642630
NCHC30BT5-*+TDR · cold climate	NF97U070T3B*	18.5	13.0	9.0	17,200	218159761

Yearly running cost in 10 large cities$537-$1,496

Phoenix, AZ$671/yr
Miami, FL$537/yr
Houston, TX$601/yr
Atlanta, GA$620/yr
Los Angeles, CA$606/yr
New York, NY$1,496/yr
Chicago, IL$1,218/yr
Denver, CO$1,014/yr
Seattle, WA$625/yr
Minneapolis, MN$1,256/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 GE NS21H24MA5-**A?: The GE NS21H24MA5-**A is rated at up to 20.5 SEER2 and 13.0 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 91 certified matchups SEER2 ranges from 15.2-20.5.
Is the GE NS21H24MA5-**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 GE NS21H24MA5-**A cost to run per year?: At its rated efficiency it costs about $537-$1,496 a year in electricity in large U.S. cities, depending on climate and local rates - for example $671 in Phoenix and $1,256 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 GE NS21H24MA5-**A?: ENERGY STAR lists 91 certified combinations for this outdoor unit. The highest-rated ones use NAM24V2TA5*-, NCHC30AT5*-**+TDR, NAM30V1TA5*-.
What refrigerant does the GE NS21H24MA5-**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 $670/yrYou save $553/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 GE NS21H24MA5-**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: $670
Current system, per year: $1,223
You save per year: $553
Payback: 16.3 years
Net after 10 years: -$3,468

Cooling $402Heating $268Electricity used: 4,186 kWhSaved vs. a minimum-efficiency heat pump: $271

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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Armstrong Air 4SHP22LX124P-**A21.0 SEER2 · 9.0 HSPF2
Trane 5TCV0X36A1 · cold climate20.0 SEER2 · 10.3 HSPF2
RUSSELL SP19AY24AJVC · cold climate21.0 SEER2 · 9.5 HSPF2
VillaTherm VHP-UCHA-24HDCT-A · cold climate20.0 SEER2 · 10.2 HSPF2
Mainline MLP19AY24AJVC · cold climate21.0 SEER2 · 9.5 HSPF2
Hisense AUWR-2424P · cold climate20.0 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.