What is the SEER2 rating of the Tempstar N4H5S30*K*AAA?

The Tempstar N4H5S30*K*AAA is rated at up to 15.2 SEER2 and 12.5 EER2 for cooling and up to 7.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.

Is the Tempstar N4H5S30*K*AAA good for cold climates?

It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 2.5-ton model.

How much does the Tempstar N4H5S30*K*AAA cost to run per year?

At its rated efficiency it costs about $859-$2,273 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,056 in Phoenix and $1,897 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the Tempstar N4H5S30*K*AAA the same as the MARATHERM R4H5S30*K*AAA?

Yes, as far as the certified ratings go. ENERGY STAR lists both model numbers with identical efficiency, capacity and matchups, which means the same outdoor unit sold under a different brand or with a minor variant code (voltage, colour or region). The full list is on this page.

Which indoor units work with the Tempstar N4H5S30*K*AAA?

ENERGY STAR lists 11 certified combinations for this outdoor unit. The highest-rated one uses EA*4X37L21A.

What refrigerant does the Tempstar N4H5S30*K*AAA use?

It uses R-410A. R-410A is being phased down under the EPA AIM Act, and new systems are moving to R-454B and R-32.

2.5-ton central heat pump · PERFORMANCE 15 SEER2 HP

Tempstar N4H5S30KAAA

Below average cooling and heating efficiency for a 2.5-ton central heat pump, but not rated for cold climates.

Ranks #198 of 199 2.5 ton central heat pumps for cooling efficiency, and costs about $953 a year to run in a mixed climate like Atlanta.

SEER2: 15.2 Cooling efficiency over a season
Below average · beats 6%
HSPF2: 7.8 Heating efficiency over a season
Below average · beats 5%
EER2: 12.5 Cooling efficiency on a 95°F day
Very good · beats 80%
Heat at 5°F: 12,900 BTU/h46% of its 47°F output
Average · beats 58%

A good fit if…

You want a choice of indoor units - 11 certified pairings.

Think twice if…

You often see nights below 0°F - it is not cold-climate certified.
Cooling cost matters most - its SEER2 is below average for central heat pumps.
You mainly need heat - its HSPF2 is below average for central heat pumps.
You want the newest refrigerant - it uses R-410A, which is being phased down.

Calculate my running cost

Details

Specifications2.5 ton, R-410A

General
Brand	Tempstar
Also sold as	MSH LEGACY, Heil, Kenmore, MARATHERM, Airquest, Keeprite, Day & Night, Comfortmaker, Smart Comfort, Arcoaire
Outdoor unit model	N4H5S30KAAA
Series	PERFORMANCE 15 SEER2 HP
Type	Central heat pump
Nominal size	2.5 ton
CompressorVariable-speed units run longer at low power	Single stage
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	July 13, 2023
Last certified	February 17, 2025
Cooling
SEER2Seasonal efficiency, higher is better	15.2 (range 15.2)
EER2Efficiency at 95°F outdoors	12.5
Cooling capacity	27,800 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8
Capacity at 47°F	28,000 BTU/h
Capacity at 17°F	16,900 BTU/h
Capacity at 5°F	12,900 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.10
ENERGY STAR cold climate	No

Heating output as it gets colder46% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with EA*4X37L21A at the standard test temperatures, in BTU/h:

Certified matchups11 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. 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.
EA*4X37L21A	80ES(N,L)0902120A	15.2	12.5	7.8	12,900	210309907
EA*4X37L21A	80ES(N,L)0902120A	15.2	12.5	7.8	12,900	210309903
EA*4X37L21A	80ES(N,L)0902120A	15.2	12.5	7.8	12,900	210309894
EA*4X37L21A	80ES(N,L)0902120A	15.2	12.5	7.8	12,900	210309899
EA*4X37L21A	80ES(N,L)0902120A	15.2	12.5	7.8	12,900	210309901
EA*4X37L21A	80ES(N,L)0902120A	15.2	12.5	7.8	12,900	210309882
EA*4X37L21A	80ES(N,L)0902120A	15.2	12.5	7.8	12,900	210309897
EA*4X37L21A	80ES(N,L)0902120A	15.2	12.5	7.8	12,900	210309891
EA*4X37L21A	80ES(N,L)0902120A	15.2	12.5	7.8	12,900	210309888
EA*4X37L21A	80ES(N,L)0902120A	15.2	12.5	7.8	12,900	210309905
EA*4X37L21A	80ES(N,L)0902120A	15.2	12.5	7.8	12,900	210309885

Same unit, other model numbers1

These model numbers have exactly the same certified ratings and matchups as the Tempstar N4H5S30*K*AAA: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

MARATHERM R4H5S30*K*AAA

Yearly running cost in 10 large cities$859-$2,273

Phoenix, AZ$1,056/yr
Miami, FL$859/yr
Houston, TX$946/yr
Atlanta, GA$953/yr
Los Angeles, CA$927/yr
New York, NY$2,273/yr
Chicago, IL$1,845/yr
Denver, CO$1,533/yr
Seattle, WA$941/yr
Minneapolis, MN$1,897/yr

At each state's average electricity price and the city's typical heating and cooling hours.

Questions6

What is the SEER2 rating of the Tempstar N4H5S30*K*AAA?: The Tempstar N4H5S30*K*AAA is rated at up to 15.2 SEER2 and 12.5 EER2 for cooling and up to 7.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
Is the Tempstar N4H5S30*K*AAA good for cold climates?: It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 2.5-ton model.
How much does the Tempstar N4H5S30*K*AAA cost to run per year?: At its rated efficiency it costs about $859-$2,273 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,056 in Phoenix and $1,897 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the Tempstar N4H5S30*K*AAA the same as the MARATHERM R4H5S30*K*AAA?: Yes, as far as the certified ratings go. ENERGY STAR lists both model numbers with identical efficiency, capacity and matchups, which means the same outdoor unit sold under a different brand or with a minor variant code (voltage, colour or region). The full list is on this page.
Which indoor units work with the Tempstar N4H5S30*K*AAA?: ENERGY STAR lists 11 certified combinations for this outdoor unit. The highest-rated one uses EA*4X37L21A.
What refrigerant does the Tempstar N4H5S30*K*AAA use?: It uses R-410A. R-410A is being phased down under the EPA AIM Act, and new systems are moving to R-454B and R-32.

Running cost and savings

Pre-filled with this model. Pick your city and what you heat with today; everything else is optional.

Heat pump $1,046/yrYou save $391/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 N4H5S30*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: $1,046
Current system, per year: $1,437
You save per year: $391
Payback: 26.9 years
Net after 10 years: -$6,591

Cooling $644Heating $402Electricity used: 6,537 kWhSaved vs. a minimum-efficiency heat pump: $57

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

Rheem WP15AY30AJ2N15.2 SEER2 · 7.8 HSPF2
WeatherMaker PH5SAN430**AA15.2 SEER2 · 7.8 HSPF2
Rheem RP15AY30AJ2N15.2 SEER2 · 7.8 HSPF2
OXBOX J5HP5030A1000AA15.2 SEER2 · 7.8 HSPF2
Midea MOVA-30HN10-M152L15.2 SEER2 · 7.8 HSPF2
Kenmore (C,H,T)4H5S30*K*AAA15.2 SEER2 · 7.8 HSPF2
Kaden KOVH-30BAM152L15.2 SEER2 · 7.8 HSPF2
Heil H4H5S30*K*AAA15.2 SEER2 · 7.8 HSPF2

See all 199 2.5 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of February 17, 2025. How we use the data.