What is the SEER2 rating of the Tempstar N5H9V24*K*AAA?

The Tempstar N5H9V24*K*AAA is rated at up to 19.5 SEER2 and 14.0 EER2 for cooling and up to 10.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 8720 certified matchups SEER2 ranges from 15.2-19.5.

Is the Tempstar N5H9V24*K*AAA good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 22,200 BTU/h at 5°F with a COP of 2.02, so it is still 2.0 times as efficient as electric resistance heat at that temperature.

How much does the Tempstar N5H9V24*K*AAA cost to run per year?

At its rated efficiency it costs about $583-$1,565 a year in electricity in large U.S. cities, depending on climate and local rates - for example $720 in Phoenix and $1,308 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 Tempstar N5H9V24*K*AAA?

ENERGY STAR lists 8720 certified combinations for this outdoor unit. The highest-rated ones use QFVA5D3617X, EA*5X37M21A, QFVA5D2417X.

2-ton central heat pump · Performance 19 SEER2 VS HP

Tempstar N5H9V24KAAA

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

Ranks #42 of 331 2 ton central heat pumps for cooling efficiency, and costs about $654 a year to run in a mixed climate like Atlanta.

SEER2: 19.5 Cooling efficiency over a season
Excellent · beats 91%
HSPF2: 10.0 Heating efficiency over a season
Very good · beats 84%
EER2: 14.0 Cooling efficiency on a 95°F day
Excellent · beats 98%
Heat at 5°F: 22,200 BTU/h95% of its 47°F output
Average · beats 47%

A good fit if…

You want low cooling bills - its SEER2 beats 91% of central heat pumps.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 22,200 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 84% 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	Tempstar
Also sold as	Keeprite, Arcoaire, Airquest, Comfortmaker, Day & Night, Heil, ACIQ
Outdoor unit model	N5H9V24KAAA
Series	Performance 19 SEER2 VS HP
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	January 14, 2025
Last certified	October 7, 2026
Cooling
SEER2Seasonal efficiency, higher is better	19.5 (range 15.2-19.5)
EER2Efficiency at 95°F outdoors	11.5-14.0
Cooling capacity	22,200-25,400 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.0-10.0
Capacity at 47°F	22,400-25,800 BTU/h
Capacity at 17°F	19,800-25,200 BTU/h
Capacity at 5°F	20,000-22,200 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.74-2.02
ENERGY STAR cold climate	Yes

Heating output as it gets colder95% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with QFVA5D3617X at the standard test temperatures, in BTU/h:

Certified matchups8,720 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 8,720 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.
QFVA5D3617X · cold climate	-	19.5	14.0	8.6	21,200	218695503
QFVA5D3617X · cold climate	-	19.5	14.0	8.6	21,200	218695501
QFVA5D3617X · cold climate	-	19.5	14.0	8.6	21,200	218695499
QFVA5D3617X · cold climate	-	19.5	14.0	8.6	21,200	218695497
QFVA5D3617X · cold climate	-	19.5	14.0	8.6	21,200	218695495
QFVA5D3617X · cold climate	-	19.5	14.0	8.6	21,200	218695493
QFVA5D3617X · cold climate	-	19.5	14.0	8.6	21,200	218695491
QFVA5D3617X · cold climate	-	19.5	14.0	8.6	21,200	218822093
EA*5X37M21A · cold climate	80MSU0802120A	19.0	14.0	10.0	21,000	217949609
EA*5X37M21A · cold climate	80MSU0802120A	19.0	14.0	10.0	21,000	217949611
EA*5X37M21A · cold climate	80MSU0802120A	19.0	14.0	10.0	21,000	217949612
EA*5X37M21A · cold climate	80MSU0802120A	19.0	14.0	10.0	21,000	217949610
EA*5X37M21A · cold climate	80MSU0802120A	19.0	14.0	10.0	21,000	217949613
EA*5X37M21A · cold climate	80MSU0802120A	19.0	14.0	10.0	21,000	217949614
EA*5X37M21A · cold climate	80MSU0802120A	19.0	14.0	10.0	21,000	217949615
EA*5X37M21A · cold climate	97VTN1002122A	19.0	14.0	10.0	21,000	217945525
EA*5X37M21A · cold climate	97VTN1002122A	19.0	14.0	10.0	21,000	217945526
EA*5X37M21A · cold climate	97VTN1002122A	19.0	14.0	10.0	21,000	217945527
EA*5X37M21A · cold climate	97VTN1002122A	19.0	14.0	10.0	21,000	217945528
EA*5X37M21A · cold climate	96VTN1002122B	19.0	14.0	10.0	21,000	217945510
EA*5X37M21A · cold climate	96VTN1002122B	19.0	14.0	10.0	21,000	217945511
EA*5X37M21A · cold climate	96VTN1002122B	19.0	14.0	10.0	21,000	217945512
EA*5X37M21A · cold climate	96VTN1002122B	19.0	14.0	10.0	21,000	217945513
EA*5X37M21A · cold climate	96VTN1002122B	19.0	14.0	10.0	21,000	217945514
EA*5X37M21A · cold climate	96VTN1002122B	19.0	14.0	10.0	21,000	217945515
EA*5X37M21A · cold climate	96VTN1002122B	19.0	14.0	10.0	21,000	217945516
EA*5X37M21A · cold climate	97VTN1002122A	19.0	14.0	10.0	21,000	217945529
EA*5X37M21A · cold climate	97VTN1002122A	19.0	14.0	10.0	21,000	217945530
EA*5X37M21A · cold climate	97VTN1002122A	19.0	14.0	10.0	21,000	217945531
EA*5X37M21A · cold climate	80VSL1102122B	19.0	14.0	10.0	21,200	217944909
EA*5X37M21A · cold climate	80VSL1102122B	19.0	14.0	10.0	21,200	217944910
EA*5X37M21A · cold climate	80VSL1102122B	19.0	14.0	10.0	21,200	217944912
EA*5X37M21A · cold climate	80VSL1102122B	19.0	14.0	10.0	21,200	217944913
EA*5X37M21A · cold climate	80VSL1102122B	19.0	14.0	10.0	21,200	217944911
EA*5X37M21A · cold climate	80VSL1102122B	19.0	14.0	10.0	21,200	217944914
EA*5X37M21A · cold climate	80VSL1102122B	19.0	14.0	10.0	21,200	217944915
EA*5X37M21A · cold climate	80MSU0601716A	19.0	14.0	10.0	21,000	217950977
EA*5X37M21A · cold climate	80MSU0601716A	19.0	14.0	10.0	21,000	217950978
EA*5X37M21A · cold climate	80MSU0601716A	19.0	14.0	10.0	21,000	217950979
EA*5X37M21A · cold climate	80MSU0601716A	19.0	14.0	10.0	21,000	217950980
EA*5X37M21A · cold climate	80MSU0601716A	19.0	14.0	10.0	21,000	217950981
EA*5X37M21A · cold climate	80MSU0601716A	19.0	14.0	10.0	21,000	217950982
EA*5X37M21A · cold climate	80MSU0601716A	19.0	14.0	10.0	21,000	217950983
EA*5X37M21A · cold climate	80MSU0802120A	19.0	14.0	10.0	21,000	218019211
EA*5X37M21A · cold climate	80MSU0601716A	19.0	14.0	10.0	21,000	218019359
EA*5X37M21A · cold climate	80VSL1102122B	19.0	14.0	10.0	21,200	218020551
EA*5X37M21A · cold climate	97VTN1002122A	19.0	14.0	10.0	21,000	218020622
EA*5X37M21A · cold climate	96VTN1002122B	19.0	14.0	10.0	21,000	218020620
QFVA5D2417X · cold climate	-	19.0	13.5	8.6	20,800	218695487
QFVA5D2417X · cold climate	-	19.0	13.5	8.6	20,800	218695485
QFVA5D2417X · cold climate	-	19.0	13.5	8.6	20,800	218695483
QFVA5D2417X · cold climate	-	19.0	13.5	8.6	20,800	218695481
QFVA5D2417X · cold climate	-	19.0	13.5	8.6	20,800	218695479
QFVA5D2417X · cold climate	-	19.0	13.5	8.6	20,800	218695477
QFVA5D2417X · cold climate	-	19.0	13.5	8.6	20,800	218695475
QFVA5D2417X · cold climate	-	19.0	13.5	8.6	20,800	218822092
EVD5X37M21A · cold climate	80CTL0901716B	19.0	14.0	8.5	21,400	217943061
EVD5X37M21A · cold climate	80CTL0901716B	19.0	14.0	8.5	21,400	217943062
EVD5X37M21A · cold climate	80CTL0901716B	19.0	14.0	8.5	21,400	217943063
EVD5X37M21A · cold climate	80CTL0901716B	19.0	14.0	8.5	21,400	217943064

Yearly running cost in 10 large cities$583-$1,565

Phoenix, AZ$720/yr
Miami, FL$583/yr
Houston, TX$645/yr
Atlanta, GA$654/yr
Los Angeles, CA$637/yr
New York, NY$1,565/yr
Chicago, IL$1,271/yr
Denver, CO$1,057/yr
Seattle, WA$650/yr
Minneapolis, MN$1,308/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 Tempstar N5H9V24*K*AAA?: The Tempstar N5H9V24*K*AAA is rated at up to 19.5 SEER2 and 14.0 EER2 for cooling and up to 10.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 8720 certified matchups SEER2 ranges from 15.2-19.5.
Is the Tempstar N5H9V24*K*AAA good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 22,200 BTU/h at 5°F with a COP of 2.02, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
How much does the Tempstar N5H9V24*K*AAA cost to run per year?: At its rated efficiency it costs about $583-$1,565 a year in electricity in large U.S. cities, depending on climate and local rates - for example $720 in Phoenix and $1,308 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 Tempstar N5H9V24*K*AAA?: ENERGY STAR lists 8720 certified combinations for this outdoor unit. The highest-rated ones use QFVA5D3617X, EA*5X37M21A, QFVA5D2417X.
What refrigerant does the Tempstar N5H9V24*K*AAA 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 $715/yrYou save $543/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 Tempstar N5H9V24*K*AAA

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: $715
Current system, per year: $1,258
You save per year: $543
Payback: 16.6 years
Net after 10 years: -$3,570

Cooling $437Heating $278Electricity used: 4,466 kWhSaved vs. a minimum-efficiency heat pump: $251

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 ton models

Carrier 27VPA924A*030 · cold climate19.5 SEER2 · 10.0 HSPF2
Trane/American Standard 5HPL6024A1000A19.5 SEER2 · 9.4 HSPF2
Bryant 249VAN024**AA · cold climate19.5 SEER2 · 10.0 HSPF2
Navien, Inc. NAZ17V3622A119.5 SEER2 · 8.8 HSPF2
Arcoaire Q5H9V24*K*AAA · cold climate19.5 SEER2 · 10.0 HSPF2
Trane 4TWV0X24A119.5 SEER2 · 8.7 HSPF2
Trane/American Standard 5HCL9024A1000A · cold climate19.7 SEER2 · 8.8 HSPF2
MDV MOD30-24HFN1-MW · cold climate19.4 SEER2 · 10.5 HSPF2

See all 331 2 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of October 7, 2026. How we use the data.