What is the SEER2 rating of the Tempstar T5H8T48*K*AAA?

The Tempstar T5H8T48*K*AAA is rated at up to 18.0 SEER2 and 13.0 EER2 for cooling and up to 8.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 415 certified matchups SEER2 ranges from 15.2-18.0.

Is the Tempstar T5H8T48*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 T5H8T48*K*AAA cost to run per year?

At its rated efficiency it costs about $1,258-$3,646 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,589 in Phoenix and $3,076 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 Tempstar T5H8T48*K*AAA?

ENERGY STAR lists 415 certified combinations for this outdoor unit. The highest-rated ones use QFVA5D6021X, FTMA5B60L0D, EVD5X61M21A*+WALLCON.

4-ton central heat pump · Mainline 18 SEER2 HP

Tempstar T5H8T48KAAA

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

Ranks #109 of 319 4 ton central heat pumps for cooling efficiency, and costs about $1,498 a year to run in a mixed climate like Atlanta.

SEER2: 18.0 Cooling efficiency over a season
Average · beats 66%
HSPF2: 8.5 Heating efficiency over a season
Below average · beats 38%
EER2: 13.0 Cooling efficiency on a 95°F day
Very good · beats 89%
Heat at 5°F: 26,600 BTU/h50% of its 47°F output
Excellent · beats 92%

A good fit if…

You want a choice of indoor units - 415 certified pairings.

Think twice if…

You often see nights below 0°F - it is not cold-climate certified.
You mainly need heat - its HSPF2 is below average for central heat pumps.

Calculate my running cost

Details

Specifications4 ton, R-454B

General
Brand	Tempstar
Outdoor unit model	T5H8T48KAAA
Series	Mainline 18 SEER2 HP
Type	Central heat pump
Nominal size	4 ton
CompressorVariable-speed units run longer at low power	Two-stage
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	November 1, 2024
Last certified	September 15, 2026
Cooling
SEER2Seasonal efficiency, higher is better	18.0 (range 15.2-18.0)
EER2Efficiency at 95°F outdoors	11.7-13.5
Cooling capacity	45,500-50,500 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8-8.5
Capacity at 47°F	48,500-52,500 BTU/h
Capacity at 17°F	29,400-32,400 BTU/h
Capacity at 5°F	23,200-26,600 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.10-2.34
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 QFVA5D6021X at the standard test temperatures, in BTU/h:

Certified matchups415 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 415 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.
QFVA5D6021X	-	18.0	13.0	8.5	25,800	218695626
FTMA5B60L0D	-	18.0	13.5	8.1	24,600	216152755
EVD5X61M21A*+WALLCON	80CSU0802120B	18.0	13.0	8.0	23,400	216351214
EVD5X61M24A*+WALLCON	80CTL0902120B	18.0	13.0	8.0	23,400	216351302
EVD5X61M24A*+WALLCON	80CTL1352422B	18.0	13.0	8.0	23,400	216351310
EVD5X61M24A*+WALLCON	80CSU0802120B	18.0	13.0	8.0	23,400	216351470
EVD5X61M24A*+WALLCON	80CSU1002120B	18.0	13.0	8.0	23,600	216351478
EVD5X61M24A*+WALLCON	97CMN1002122B	18.0	13.0	8.0	23,600	216351350
EVD5X61M24A*+WALLCON	96CTN1002122B	18.0	13.0	8.0	23,600	216351422
EVD5X61M24A*+WALLCON	96CTN1202422B	18.0	13.0	8.0	23,600	216351430
EVD5X61M24A*+WALLCON	97CTN1002122A	18.0	13.0	8.0	23,600	216351494
EVD5X61M24A*+WALLCON	97CTN1202422A	18.0	13.0	8.0	23,600	216351502
EVD5X61M21A*+WALLCON	80CTL0902120B	18.0	13.0	8.0	23,600	216351061
EVD5X61M21A*+WALLCON	80CSU1002120A	18.0	12.0	8.0	25,200	216351005
EVD5X61M21A*+WALLCON	80CTL1102120B	18.0	13.0	8.0	23,600	216351069
EVD5X61M21A	97VTN1002122A	17.5	12.5	8.5	24,600	216351262
EVD5X61M24A	95MSU1002122A	17.5	12.5	8.5	25,000	216351406
EVD5X61M24A	80VSL1102122B	17.5	12.5	8.5	25,000	216351278
EVD5X61M24A	96VTN1002122B	17.5	12.5	8.5	24,800	216351454
EVD5X61M24A	97VTN1002122A	17.5	12.5	8.5	24,800	216351526
EVD5X61M21A	80MSU0802120A	17.5	13.0	8.5	24,400	216351037
EVD5X61M24A	80VTL1102122B	17.5	12.5	8.5	24,800	216351326
EVD5X61M21A	96VTN1002122B	17.5	12.5	8.5	24,600	216351206
EVD5X61M21A	80VSL1102122B	17.5	12.5	8.5	24,800	216351021
EVD5X61M21A	80MSU1002120A	17.5	12.5	8.5	25,000	216351045
EVD5X61M21A	95MSU1002122A	17.5	12.5	8.1	24,400	216351166
EVD5X49M24A	80MSU0802120A	17.5	12.5	8.1	24,600	216350573
EVM5X60M21A	80MSU0802120A	17.5	12.5	8.1	24,400	216350021
EVM5X60M21A	96VTN1002122B	17.5	12.5	8.1	24,400	216350189
EVD5X60M21A	96VTN1002122B	17.5	12.5	8.1	24,400	216350933
EVD5X61M21A	80MSU0601716A	17.5	12.0	8.1	25,000	216351029
EVD5X61M21A	80VTL1102122B	17.5	12.5	8.1	24,600	216351085
EVM5X49M21A	80MSU0802120A	17.5	12.5	8.1	24,400	216349765
QFVA5D4821X	-	17.5	12.5	8.1	25,400	218695619
EVD5X61M21A*+WALLCON	97CMN0802120B	17.5	12.5	8.0	23,800	216351118
EVD5X61M21A*+WALLCON	97CMN1002122B	17.5	13.0	8.0	23,600	216351126
EVM5X49M21A*+WALLCON	95CSU1002122B	17.5	12.5	8.0	23,600	216349821
EVD5X61M21A*+WALLCON	80CSU1002120B	17.5	13.0	8.0	23,600	216351222
EVD5X61M21A*+WALLCON	97CTN0802120A	17.5	12.5	8.0	23,800	216351230
EVD5X61M21A*+WALLCON	97CTN1002122A	17.5	13.0	8.0	23,600	216351238
EVD5X49M24A*+WALLCON	80CTL0902120B	17.5	12.5	8.0	23,400	216350581
EVD5X49M24A*+WALLCON	96CTN1202422B	17.5	12.5	8.0	23,400	216350669
EVD5X61M24A*+WALLCON	97CMN1202422B	17.5	13.0	8.0	23,600	216351358
EVD5X61M24A*+WALLCON	96CTN0802120B	17.5	12.5	8.0	23,600	216351414
EVD5X61M24A*+WALLCON	80CTL0702120B	17.5	12.5	8.0	23,800	216351294
EVM5X49M21A*+WALLCON	96CTN1002122B	17.5	12.5	8.0	23,600	216349901
EVM5X49M21A*+WALLCON	80CSU0802120B	17.5	13.0	8.0	23,400	216349933
EVD5X49M24A*+WALLCON	97CTN1202422A	17.5	12.5	8.0	23,400	216350709
EVM5X49M21A*+WALLCON	80CSU1002120B	17.5	12.5	8.0	23,600	216349941
EVM5X49M21A*+WALLCON	97CTN1002122A	17.5	12.5	8.0	23,600	216349957
EVM5X60M21A*+WALLCON	80CSU1002120A	17.5	12.0	8.0	25,200	216349989
EVD5X60M21A	80MSU0802120A	17.5	12.5	8.0	24,400	216350773
EVD5X60M21A*+WALLCON	80CSU1002120A	17.5	12.0	8.0	25,200	216350741
EVM5X60M21A*+WALLCON	80CTL0902120B	17.5	12.5	8.0	23,600	216350045
EVM5X60M21A*+WALLCON	80CTL1102120B	17.5	12.5	8.0	23,600	216350053
EVM5X60M21A*+WALLCON	95CSU1002122B	17.5	12.5	8.0	23,600	216350085
EVD5X61M24A*+WALLCON	97CTN0802120A	17.5	12.5	8.0	23,600	216351486
EVD5X60M21A*+WALLCON	80CTL0902120B	17.5	12.5	8.0	23,600	216350797
EVD5X60M21A*+WALLCON	80CTL1102120B	17.5	12.5	8.0	23,600	216350805
EVD5X60M21A*+WALLCON	95CSU1002122B	17.5	12.5	8.0	23,400	216350837

Yearly running cost in 10 large cities$1,258-$3,646

Phoenix, AZ$1,589/yr
Miami, FL$1,258/yr
Houston, TX$1,426/yr
Atlanta, GA$1,498/yr
Los Angeles, CA$1,469/yr
New York, NY$3,646/yr
Chicago, IL$2,973/yr
Denver, CO$2,482/yr
Seattle, WA$1,533/yr
Minneapolis, MN$3,076/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 Tempstar T5H8T48*K*AAA?: The Tempstar T5H8T48*K*AAA is rated at up to 18.0 SEER2 and 13.0 EER2 for cooling and up to 8.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 415 certified matchups SEER2 ranges from 15.2-18.0.
Is the Tempstar T5H8T48*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 T5H8T48*K*AAA cost to run per year?: At its rated efficiency it costs about $1,258-$3,646 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,589 in Phoenix and $3,076 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 Tempstar T5H8T48*K*AAA?: ENERGY STAR lists 415 certified combinations for this outdoor unit. The highest-rated ones use QFVA5D6021X, FTMA5B60L0D, EVD5X61M21A*+WALLCON.
What refrigerant does the Tempstar T5H8T48*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 $1,597/yrYou save $910/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 T5H8T48*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: $1,597
Current system, per year: $2,508
You save per year: $910
Payback: 19.8 years
Net after 10 years: -$8,898

Cooling $939Heating $659Electricity used: 9,984 kWhSaved vs. a minimum-efficiency heat pump: $331

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

TCL THH48TEI2NAI0H24 · cold climate18.0 SEER2 · 8.5 HSPF2
Trane 4TWV8X48A118.0 SEER2 · 8.5 HSPF2
Kenmore (C,H,T)5H8T48*K*AAA18.0 SEER2 · 8.5 HSPF2
Trane 4TWV8X60A1 · cold climate18.0 SEER2 · 8.5 HSPF2
Heil H5H8T48*K*AAA18.0 SEER2 · 8.5 HSPF2
WeatherMaker PH8TAN548**AB18.0 SEER2 · 8.5 HSPF2
Friedrich RD17AZ48AJ3N · cold climate18.0 SEER2 · 8.5 HSPF2
Century HSA1960V1-**A18.0 SEER2 · 8.2 HSPF2

See all 319 4 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of September 15, 2026. How we use the data.