What is the SEER2 rating of the Kenmore B5H6S42*K*AAA?

The Kenmore B5H6S42*K*AAA is rated at up to 15.5 SEER2 and 13.0 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 32 certified matchups SEER2 ranges from 15.2-15.5.

Is the Kenmore B5H6S42*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 3.5-ton model.

How much does the Kenmore B5H6S42*K*AAA cost to run per year?

At its rated efficiency it costs about $1,286-$3,312 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,568 in Phoenix and $2,753 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 Kenmore B5H6S42*K*AAA?

ENERGY STAR lists 32 certified combinations for this outdoor unit. The highest-rated ones use FTMA5B60L0D, F5MA5*60L*D, FEVB0060**+NAVA56001CK.

3.5-ton central heat pump · MAINLINE 16 SEER2 HP

Kenmore B5H6S42KAAA

Below average cooling and heating efficiency for a 3.5-ton central heat pump, but not rated for cold climates.

Ranks #109 of 138 3.5 ton central heat pumps for cooling efficiency, and costs about $1,398 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: 13.0 Cooling efficiency on a 95°F day
Very good · beats 89%
Heat at 5°F: 19,900 BTU/h49% of its 47°F output
Very good · beats 83%

A good fit if…

You want a choice of indoor units - 32 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

Specifications3.5 ton, R-454B

General
Brand	Kenmore
Also sold as	Heil, Tempstar, Arcoaire, Airquest, Keeprite, Day & Night, Comfortmaker
Outdoor unit model	B5H6S42KAAA
Series	MAINLINE 16 SEER2 HP
Type	Central heat pump
Nominal size	3.5 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	41,500-43,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8
Capacity at 47°F	39,000-40,500 BTU/h
Capacity at 17°F	24,600-25,600 BTU/h
Capacity at 5°F	19,000-19,900 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.20-2.26
ENERGY STAR cold climate	No

Heating output as it gets colder49% 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 matchups32 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	13.0	7.8	19,000	218198537
FTMA5B60L0D	15.5	13.0	7.8	19,000	218188800
FTMA5B60L0D	15.5	13.0	7.8	19,000	218189143
FTMA5B60L0D	15.5	13.0	7.8	19,000	218201956
FTMA5B60L0D	15.5	13.0	7.8	19,000	218201953
FTMA5B60L0D	15.5	13.0	7.8	19,000	218208943
FTMA5B60L0D	15.5	13.0	7.8	19,000	218208942
FTMA5B60L0D	15.5	13.0	7.8	19,000	218208941
F5MA560LD	15.2	11.7	7.8	19,900	218198555
FEVB0060**+NAVA56001CK	15.2	12.5	7.8	19,800	218198547
FHMA560LD	15.2	11.7	7.8	19,900	218198536
FEVB0060**+NAVA56001CK	15.2	12.5	7.8	19,800	218188810
FHMA560LD	15.2	11.7	7.8	19,900	218188799
F5MA560LD	15.2	11.7	7.8	19,900	218189161
FEVB0060**+NAVA56001CK	15.2	12.5	7.8	19,800	218189153
FHMA560LD	15.2	11.7	7.8	19,900	218189142
F5MA560LD	15.2	11.7	7.8	19,900	218202039
F5MA560LD	15.2	11.7	7.8	19,900	218202036
F5MA560LD	15.2	11.7	7.8	19,900	218202035
FEVB0060**+NAVA56001CK	15.2	12.5	7.8	19,800	218202007
FEVB0060**+NAVA56001CK	15.2	12.5	7.8	19,800	218202006
FHMA560LD	15.2	11.7	7.8	19,900	218201952
FHMA560LD	15.2	11.7	7.8	19,900	218201951
F5MA560LD	15.2	11.7	7.8	19,900	218208995
F5MA560LD	15.2	11.7	7.8	19,900	218208994
F5MA560LD	15.2	11.7	7.8	19,900	218208993
FEVB0060**+NAVA56001CK	15.2	12.5	7.8	19,800	218208971
FEVB0060**+NAVA56001CK	15.2	12.5	7.8	19,800	218208970
FHMA560LD	15.2	11.7	7.8	19,900	218208940
FHMA560LD	15.2	11.7	7.8	19,900	218208939
FHMA560LD	15.2	11.7	7.8	19,900	218208938
FEVB0060**+NAVA56001CK	15.2	12.5	7.8	19,800	218208931

Yearly running cost in 10 large cities$1,286-$3,312

Phoenix, AZ$1,568/yr
Miami, FL$1,286/yr
Houston, TX$1,405/yr
Atlanta, GA$1,398/yr
Los Angeles, CA$1,355/yr
New York, NY$3,312/yr
Chicago, IL$2,683/yr
Denver, CO$2,226/yr
Seattle, WA$1,364/yr
Minneapolis, MN$2,753/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 Kenmore B5H6S42*K*AAA?: The Kenmore B5H6S42*K*AAA is rated at up to 15.5 SEER2 and 13.0 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 32 certified matchups SEER2 ranges from 15.2-15.5.
Is the Kenmore B5H6S42*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 3.5-ton model.
How much does the Kenmore B5H6S42*K*AAA cost to run per year?: At its rated efficiency it costs about $1,286-$3,312 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,568 in Phoenix and $2,753 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 Kenmore B5H6S42*K*AAA?: ENERGY STAR lists 32 certified combinations for this outdoor unit. The highest-rated ones use FTMA5B60L0D, F5MA5*60L*D, FEVB0060**+NAVA56001CK.
What refrigerant does the Kenmore B5H6S42*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 $1,547/yrYou save $612/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 Kenmore B5H6S42*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: $1,547
Current system, per year: $2,159
You save per year: $612
Payback: 26.1 years
Net after 10 years: -$9,880

Cooling $965Heating $582Electricity used: 9,667 kWhSaved vs. a minimum-efficiency heat pump: $104

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 3.5 ton models

Heil N5H5S42*K*AAA15.5 SEER2 · 7.8 HSPF2
Tempstar T5H6S42*K*AAA15.5 SEER2 · 7.8 HSPF2
ECOTEMP W5H5S42*K*AAA15.5 SEER2 · 7.8 HSPF2
MRCOOL MHP17042A-**A15.4 SEER2 · 7.8 HSPF2
Carrier 27SCA542A**3015.5 SEER2 · 7.8 HSPF2
Kepler AZPN/45WD · cold climate15.2 SEER2 · 9.2 HSPF2
Bryant PH5SAN542**AA15.5 SEER2 · 7.8 HSPF2
MDV MOE30U-45HFN1-M · cold climate15.2 SEER2 · 9.2 HSPF2

See all 138 3.5 ton central heat pumps, ranked

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