What is the SEER2 rating of the Heil B5H6S36*K*AAA?

The Heil B5H6S36*K*AAA is rated at up to 15.5 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; across its 208 certified matchups SEER2 ranges from 15.2-15.5.

Is the Heil B5H6S36*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 3-ton model.

How much does the Heil B5H6S36*K*AAA cost to run per year?

At its rated efficiency it costs about $1,054-$2,779 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,294 in Phoenix and $2,318 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 Heil B5H6S36*K*AAA?

ENERGY STAR lists 208 certified combinations for this outdoor unit. The highest-rated ones use FEVA0048**+NAVA54801CK, FMA5X36**AL, FEVB0048**+NAVA54801CK.

3-ton central heat pump · MAINLINE 16 SEER2 HP

Heil B5H6S36KAAA

Below average cooling and heating efficiency for a 3-ton central heat pump, but not rated for cold climates.

Ranks #267 of 302 3 ton central heat pumps for cooling efficiency, and costs about $1,167 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: 12.5 Cooling efficiency on a 95°F day
Very good · beats 80%
Heat at 5°F: 18,100 BTU/h48% of its 47°F output
Very good · beats 81%

A good fit if…

You want a choice of indoor units - 208 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

Specifications3 ton, R-454B

General
Brand	Heil
Also sold as	Arcoaire, Airquest, Kenmore, Keeprite, Day & Night, Comfortmaker, Tempstar
Outdoor unit model	B5H6S36KAAA
Series	MAINLINE 16 SEER2 HP
Type	Central heat pump
Nominal size	3 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	11.7-13.0
Cooling capacity	33,800-36,800 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8
Capacity at 47°F	33,200-36,200 BTU/h
Capacity at 17°F	21,000-22,800 BTU/h
Capacity at 5°F	16,700-18,100 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.00-2.24
ENERGY STAR cold climate	No

Heating output as it gets colder48% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with FEVA0048**+NAVA54801CK at the standard test temperatures, in BTU/h:

Certified matchups208 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 208 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.
FEVA0048**+NAVA54801CK	-	15.5	12.5	7.8	17,400	218187424
FMA5X36**AL	-	15.5	12.5	7.8	17,000	218187420
FEVB0048**+NAVA54801CK	-	15.5	12.5	7.8	17,400	218187418
FEVA0048**+NAVA54801CK	-	15.5	12.5	7.8	17,400	218193510
FEVA0048**+NAVA54801CK	-	15.5	12.5	7.8	17,400	218193507
F5MA548LC	-	15.5	13.0	7.8	17,500	218193504
F5MA548LC	-	15.5	13.0	7.8	17,500	218193503
F5MA548LC	-	15.5	13.0	7.8	17,500	218193500
FMA5X36**AL	-	15.5	12.5	7.8	17,000	218192801
FMA5X36**AL	-	15.5	12.5	7.8	17,000	218192800
FEVB0048**+NAVA54801CK	-	15.5	12.5	7.8	17,400	218192791
FEVB0048**+NAVA54801CK	-	15.5	12.5	7.8	17,400	218192790
FHMA548LC	-	15.5	13.0	7.8	17,500	218192497
FHMA548LC	-	15.5	13.0	7.8	17,500	218192494
FHMA548LC	-	15.5	13.0	7.8	17,500	218192493
FTMA5B48L0C	-	15.5	12.5	7.8	16,700	218192486
FTMA5B48L0C	-	15.5	12.5	7.8	16,700	218192485
FTMA5B48L0C	-	15.5	12.5	7.8	16,700	218192484
FMA5X36**AL	-	15.5	12.5	7.8	17,000	218198296
FEVB0048**+NAVA54801CK	-	15.5	12.5	7.8	17,400	218198294
FHMA548LC	-	15.5	13.0	7.8	17,500	218198233
FTMA5B48L0C	-	15.5	12.5	7.8	16,700	218198232
FEVA0048**+NAVA54801CK	-	15.5	12.5	7.8	17,400	218198413
F5MA548LC	-	15.5	13.0	7.8	17,500	218198412
FHMA548LC	-	15.5	13.0	7.8	17,500	218208030
FHMA548LC	-	15.5	13.0	7.8	17,500	218208029
FHMA548LC	-	15.5	13.0	7.8	17,500	218208028
FTMA5B48L0C	-	15.5	12.5	7.8	16,700	218208027
FTMA5B48L0C	-	15.5	12.5	7.8	16,700	218208026
FTMA5B48L0C	-	15.5	12.5	7.8	16,700	218208025
FEVB0048**+NAVA54801CK	-	15.5	12.5	7.8	17,400	218208021
FEVA0048**+NAVA54801CK	-	15.5	12.5	7.8	17,400	218208569
FEVA0048**+NAVA54801CK	-	15.5	12.5	7.8	17,400	218208568
FEVA0048**+NAVA54801CK	-	15.5	12.5	7.8	17,400	218208567
F5MA548LC	-	15.5	13.0	7.8	17,500	218208566
F5MA548LC	-	15.5	13.0	7.8	17,500	218208565
F5MA548LC	-	15.5	13.0	7.8	17,500	218208564
FMA5X36**AL	-	15.5	12.5	7.8	17,000	218208218
FMA5X36**AL	-	15.5	12.5	7.8	17,000	218208217
FMA5X36**AL	-	15.5	12.5	7.8	17,000	218208216
FEVB0048**+NAVA54801CK	-	15.5	12.5	7.8	17,400	218208212
FEVB0048**+NAVA54801CK	-	15.5	12.5	7.8	17,400	218208211
FEVA0048**+NAVA54801CK	-	15.5	12.5	7.8	17,400	218209615
F5MA548LC	-	15.5	13.0	7.8	17,500	218209614
FMA5X36**AL	-	15.5	12.5	7.8	17,000	218209498
FEVB0048**+NAVA54801CK	-	15.5	12.5	7.8	17,400	218209496
FHMA548LC	-	15.5	13.0	7.8	17,500	218209435
FTMA5B48L0C	-	15.5	12.5	7.8	16,700	218209434
FM(C,U)5Z36**AL	-	15.2	12.5	7.8	17,200	218187423
EA*5X48M21A	96CTN0802120B	15.2	12.0	7.8	17,500	218187347
EA*5X48M21A	80CTL1102120B	15.2	12.0	7.8	17,500	218187344
EA*5X48M21A	96VTN1002122B	15.2	11.7	7.8	17,500	218191391
EA*5X48M21A	96VTN1002122B	15.2	11.7	7.8	17,500	218191390
EA*5X48M21A	96VTN1002122B	15.2	11.7	7.8	17,500	218191389
EA*5X48M21A	96CTN0802120B	15.2	12.0	7.8	17,500	218191383
EA*5X48M21A	96CTN0802120B	15.2	12.0	7.8	17,500	218191382
EA*5X48M21A	95MSU1002122A	15.2	12.0	7.8	17,600	218191381
EA*5X48M21A	95MSU1002122A	15.2	12.0	7.8	17,600	218191380
EA*5X48M21A	95MSU1002122A	15.2	12.0	7.8	17,600	218191379
EA*5X48M21A	92MSN1002120A	15.2	12.0	7.8	17,600	218191363

Yearly running cost in 10 large cities$1,054-$2,779

Phoenix, AZ$1,294/yr
Miami, FL$1,054/yr
Houston, TX$1,160/yr
Atlanta, GA$1,167/yr
Los Angeles, CA$1,134/yr
New York, NY$2,779/yr
Chicago, IL$2,255/yr
Denver, CO$1,873/yr
Seattle, WA$1,150/yr
Minneapolis, MN$2,318/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 Heil B5H6S36*K*AAA?: The Heil B5H6S36*K*AAA is rated at up to 15.5 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; across its 208 certified matchups SEER2 ranges from 15.2-15.5.
Is the Heil B5H6S36*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 3-ton model.
How much does the Heil B5H6S36*K*AAA cost to run per year?: At its rated efficiency it costs about $1,054-$2,779 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,294 in Phoenix and $2,318 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 Heil B5H6S36*K*AAA?: ENERGY STAR lists 208 certified combinations for this outdoor unit. The highest-rated ones use FEVA0048**+NAVA54801CK, FMA5X36**AL, FEVB0048**+NAVA54801CK.
What refrigerant does the Heil B5H6S36*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 $1,281/yrYou save $503/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 B5H6S36*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: $1,281
Current system, per year: $1,785
You save per year: $503
Payback: 25.8 years
Net after 10 years: -$7,968

Cooling $790Heating $491Electricity used: 8,009 kWhSaved vs. a minimum-efficiency heat pump: $86

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 3 ton models

Bryant PH5SAN436**AA15.5 SEER2 · 7.8 HSPF2
Bryant 227TAN036**AA15.5 SEER2 · 7.8 HSPF2
LPS Legacy N4H5S36*K*AAA15.5 SEER2 · 7.8 HSPF2
Kepler AZPN/36WAC · cold climate15.5 SEER2 · 8.6 HSPF2
Tempstar T5H6S36*K*AAA15.5 SEER2 · 7.8 HSPF2
KERR A-KXP36TA-1 · cold climate15.8 SEER2 · 9.4 HSPF2
AC Pro SPHP-Z-V037BB · cold climate15.4 SEER2 · 9.8 HSPF2
Whirlpool WLP15AY36AJ2N16.0 SEER2 · 7.8 HSPF2

See all 302 3 ton central heat pumps, ranked

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