What is the SEER2 rating of the Tempstar T5H6S48*K*AAA?

The Tempstar T5H6S48*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 5 certified matchups SEER2 ranges from 15.2-15.5.

Is the Tempstar T5H6S48*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 Tempstar T5H6S48*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 Tempstar T5H6S48*K*AAA the same as the Kenmore (C,H,T)5H6S48*K*AAA?

Yes, as far as the certified ratings go. ENERGY STAR lists 3 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 T5H6S48*K*AAA?

ENERGY STAR lists 5 certified combinations for this outdoor unit. The highest-rated ones use FTMA5B60L0D, FHMA5*60L*D, FEVB0060**+NAVA56001CK.

4-ton central heat pump · MAINLINE 16 SEER2 HP

Tempstar T5H6S48KAAA

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

Ranks #292 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 certified 4-ton central heat pump at a typical efficiency level.

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	Tempstar
Also sold as	Kenmore, WeatherMaker
Outdoor unit model	T5H6S48KAAA
Series	MAINLINE 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 9, 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 matchups5 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	214165308
FHMA560LD	15.2	12.5	7.8	24,400	214165201
FEVB0060**+NAVA56001CK	15.2	12.0	7.8	24,400	214277675
F5MA560LD	15.2	12.5	7.8	24,400	216464220
FEVA0060**+NAVA56001CK	15.2	12.0	7.8	24,400	217051838

Same unit, other model numbers2

These model numbers have exactly the same certified ratings and matchups as the Tempstar T5H6S48*K*AAA: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

Kenmore (C,H,T)5H6S48*K*AAA
WeatherMaker PH5SAN548**AB

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 Tempstar T5H6S48*K*AAA?: The Tempstar T5H6S48*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 5 certified matchups SEER2 ranges from 15.2-15.5.
Is the Tempstar T5H6S48*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 Tempstar T5H6S48*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 Tempstar T5H6S48*K*AAA the same as the Kenmore (C,H,T)5H6S48*K*AAA?: Yes, as far as the certified ratings go. ENERGY STAR lists 3 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 T5H6S48*K*AAA?: ENERGY STAR lists 5 certified combinations for this outdoor unit. The highest-rated ones use FTMA5B60L0D, FHMA5*60L*D, FEVB0060**+NAVA56001CK.
What refrigerant does the Tempstar T5H6S48*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 Tempstar T5H6S48*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

Heil N5H5S48*K*AAA15.5 SEER2 · 7.8 HSPF2
TCL THH48HAI2NAF2U23 · cold climate15.2 SEER2 · 8.5 HSPF2
Heil B5H6S48*K*AAA15.5 SEER2 · 7.8 HSPF2
1HVAC ACIQ-60-EHPD · cold climate15.2 SEER2 · 8.4 HSPF2
Comfortmaker C5H6S48*K*AAA15.5 SEER2 · 7.8 HSPF2
AproDr AHU19-60HN1-C · cold climate15.2 SEER2 · 8.4 HSPF2
Carrier 27SCA548A**3015.5 SEER2 · 7.8 HSPF2
Blueridge BNG2A60SCN · cold climate15.2 SEER2 · 8.4 HSPF2

See all 319 4 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of June 9, 2026. How we use the data.