What is the SEER2 rating of the Heil N5H5S48*K*AAA?

The Heil N5H5S48*K*AAA is rated at up to 15.5 SEER2 and 12.0 EER2 for cooling and up to 7.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 53 certified matchups SEER2 ranges from 15.2-15.5.

Is the Heil N5H5S48*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 4-ton model.

How much does the Heil N5H5S48*K*AAA cost to run per year?

At its rated efficiency it costs about $1,440-$3,847 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,775 in Phoenix and $3,214 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the Heil N5H5S48*K*AAA the same as the Heil R5H5S48*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 Heil N5H5S48*K*AAA?

ENERGY STAR lists 53 certified combinations for this outdoor unit. The highest-rated ones use FTMA5B60L0D, FEVB0060**+NAVA56001CK, FHMA5*60L*D.

4-ton central heat pump · PERFORMANCE 16 SEER2 HP

Heil N5H5S48KAAA

Below average cooling and heating efficiency for a 4-ton central heat pump, but not rated for cold climates.

Ranks #291 of 319 4 ton central heat pumps for cooling efficiency, and costs about $1,610 a year to run in a mixed climate like Atlanta.

SEER2: 15.5 Cooling efficiency over a season
Below average · beats 15%
HSPF2: 7.8 Heating efficiency over a season
Below average · beats 5%
EER2: 12.0 Cooling efficiency on a 95°F day
Average · beats 64%
Heat at 5°F: 24,400 BTU/h50% of its 47°F output
Very good · beats 88%

A good fit if…

You want a choice of indoor units - 53 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.
Comfort and noise matter - a single-stage compressor runs only full-on or off.

Calculate my running cost

Details

Specifications4 ton, R-454B

General
Brand	Heil
Also sold as	Airquest, Arcoaire, Comfortmaker, Day & Night, Keeprite, MARATHERM, Smart Comfort, Tempstar, Kenmore, ACIQ
Outdoor unit model	N5H5S48KAAA
Series	PERFORMANCE 16 SEER2 HP
Type	Central heat pump
Nominal size	4 ton
CompressorVariable-speed units run longer at low power	Single stage
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	January 1, 2024
Last certified	June 29, 2026
Cooling
SEER2Seasonal efficiency, higher is better	15.5 (range 15.2-15.5)
EER2Efficiency at 95°F outdoors	12.0-12.5
Cooling capacity	46,500-48,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8
Capacity at 47°F	46,500-48,500 BTU/h
Capacity at 17°F	30,000-30,600 BTU/h
Capacity at 5°F	23,600-24,400 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.26-2.30
ENERGY STAR cold climate	No

Heating output as it gets colder50% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with FTMA5B60L0D at the standard test temperatures, in BTU/h:

Certified matchups53 indoor units

The same outdoor unit scores differently with each indoor unit. 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.
FTMA5B60L0D	15.5	12.0	7.8	23,600	214180119
FTMA5B60L0D	15.5	12.0	7.8	23,600	214180121
FTMA5B60L0D	15.5	12.0	7.8	23,600	214180123
FTMA5B60L0D	15.5	12.0	7.8	23,600	214180125
FTMA5B60L0D	15.5	12.0	7.8	23,600	214180127
FTMA5B60L0D	15.5	12.0	7.8	23,600	214180129
FTMA5B60L0D	15.5	12.0	7.8	23,600	214180131
FTMA5B60L0D	15.5	12.0	7.8	23,600	214180133
FTMA5B60L0D	15.5	12.0	7.8	23,600	214180135
FTMA5B60L0D	15.5	12.0	7.8	23,600	214180137
FTMA5B60L0D	15.5	12.0	7.8	23,600	216629135
FEVB0060**+NAVA56001CK	15.2	12.0	7.8	24,400	214179624
FHMA560LD	15.2	12.5	7.8	24,400	214179640
FHMA560LD	15.2	12.5	7.8	24,400	214179642
FHMA560LD	15.2	12.5	7.8	24,400	214179644
FHMA560LD	15.2	12.5	7.8	24,400	214179646
FHMA560LD	15.2	12.5	7.8	24,400	214179648
FHMA560LD	15.2	12.5	7.8	24,400	214179650
FHMA560LD	15.2	12.5	7.8	24,400	214179654
FHMA560LD	15.2	12.5	7.8	24,400	214179652
FHMA560LD	15.2	12.5	7.8	24,400	214179656
FHMA560LD	15.2	12.5	7.8	24,400	214179658
FEVB0060**+NAVA56001CK	15.2	12.0	7.8	24,400	214277471
FEVB0060**+NAVA56001CK	15.2	12.0	7.8	24,400	214277474
FEVB0060**+NAVA56001CK	15.2	12.0	7.8	24,400	214277476
FEVB0060**+NAVA56001CK	15.2	12.0	7.8	24,400	214277479
FEVB0060**+NAVA56001CK	15.2	12.0	7.8	24,400	214277482
FEVB0060**+NAVA56001CK	15.2	12.0	7.8	24,400	214277486
FEVB0060**+NAVA56001CK	15.2	12.0	7.8	24,400	214277489
FEVB0060**+NAVA56001CK	15.2	12.0	7.8	24,400	214277492
FEVB0060**+NAVA56001CK	15.2	12.0	7.8	24,400	214277495
F5MA560LD	15.2	12.5	7.8	24,400	216464185
F5MA560LD	15.2	12.5	7.8	24,400	216464187
F5MA560LD	15.2	12.5	7.8	24,400	216464195
F5MA560LD	15.2	12.5	7.8	24,400	216464189
F5MA560LD	15.2	12.5	7.8	24,400	216464191
F5MA560LD	15.2	12.5	7.8	24,400	216464193
F5MA560LD	15.2	12.5	7.8	24,400	216464197
F5MA560LD	15.2	12.5	7.8	24,400	216464199
F5MA560LD	15.2	12.5	7.8	24,400	216464201
F5MA560LD	15.2	12.5	7.8	24,400	216464203
F5MA560LD	15.2	12.5	7.8	24,400	216629117
FEVA0060**+NAVA56001CK	15.2	12.0	7.8	24,400	217051801
FEVA0060**+NAVA56001CK	15.2	12.0	7.8	24,400	217051803
FEVA0060**+NAVA56001CK	15.2	12.0	7.8	24,400	217051805
FEVA0060**+NAVA56001CK	15.2	12.0	7.8	24,400	217051807
FEVA0060**+NAVA56001CK	15.2	12.0	7.8	24,400	217051809
FEVA0060**+NAVA56001CK	15.2	12.0	7.8	24,400	217051811
FEVA0060**+NAVA56001CK	15.2	12.0	7.8	24,400	217051813
FEVA0060**+NAVA56001CK	15.2	12.0	7.8	24,400	217051815
FEVA0060**+NAVA56001CK	15.2	12.0	7.8	24,400	217051817
FEVA0060**+NAVA56001CK	15.2	12.0	7.8	24,400	217051819
FHMA560LD	15.2	12.5	7.8	24,400	217738742

Same unit, other model numbers1

These model numbers have exactly the same certified ratings and matchups as the Heil N5H5S48*K*AAA: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

Heil R5H5S48*K*AAA

Yearly running cost in 10 large cities$1,440-$3,847

Phoenix, AZ$1,775/yr
Miami, FL$1,440/yr
Houston, TX$1,591/yr
Atlanta, GA$1,610/yr
Los Angeles, CA$1,567/yr
New York, NY$3,847/yr
Chicago, IL$3,124/yr
Denver, CO$2,597/yr
Seattle, WA$1,596/yr
Minneapolis, MN$3,214/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 Heil N5H5S48*K*AAA?: The Heil N5H5S48*K*AAA is rated at up to 15.5 SEER2 and 12.0 EER2 for cooling and up to 7.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 53 certified matchups SEER2 ranges from 15.2-15.5.
Is the Heil N5H5S48*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 4-ton model.
How much does the Heil N5H5S48*K*AAA cost to run per year?: At its rated efficiency it costs about $1,440-$3,847 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,775 in Phoenix and $3,214 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the Heil N5H5S48*K*AAA the same as the Heil R5H5S48*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 Heil N5H5S48*K*AAA?: ENERGY STAR lists 53 certified combinations for this outdoor unit. The highest-rated ones use FTMA5B60L0D, FEVB0060**+NAVA56001CK, FHMA5*60L*D.
What refrigerant does the Heil N5H5S48*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 $1,761/yrYou save $688/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 Heil N5H5S48*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: $1,761
Current system, per year: $2,449
You save per year: $688
Payback: 26.1 years
Net after 10 years: -$11,115

Cooling $1,079Heating $682Electricity used: 11,005 kWhSaved vs. a minimum-efficiency heat pump: $118

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 4 ton models

Tempstar T5H6S48*K*AAA15.5 SEER2 · 7.8 HSPF2
Comfortmaker C5H6S48*K*AAA15.5 SEER2 · 7.8 HSPF2
TCL THH48HAI2NAF2U23 · cold climate15.2 SEER2 · 8.5 HSPF2
Carrier 27SCA548A**3015.5 SEER2 · 7.8 HSPF2
1HVAC ACIQ-60-EHPD · cold climate15.2 SEER2 · 8.4 HSPF2
Bryant PH5SAN548**AA15.5 SEER2 · 7.8 HSPF2
AproDr AHU19-60HN1-C · cold climate15.2 SEER2 · 8.4 HSPF2
Bryant GH5SAN548**AA15.5 SEER2 · 7.8 HSPF2

See all 319 4 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of June 29, 2026. How we use the data.