What is the SEER2 rating of the Trane 5TWX6048A1?

The Trane 5TWX6048A1 is rated at up to 16.0 SEER2 and 12.0 EER2 for cooling and up to 8.1 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 54 certified matchups SEER2 ranges from 15.2-16.0.

Is the Trane 5TWX6048A1 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 Trane 5TWX6048A1 cost to run per year?

At its rated efficiency it costs about $1,319-$3,388 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,607 in Phoenix and $2,816 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 Trane 5TWX6048A1?

ENERGY STAR lists 54 certified combinations for this outdoor unit. The highest-rated ones use 5TXCC009AS3+TSTAT+P0V0C000M50SD, 5TEMCD07AV51+TDR+TSTAT, 5TEMCD06AV41+TDR+TSTAT.

3.5-ton central heat pump · 16 Single-Stage Heat Pump with WeatherGuard Top

Trane 5TWX6048A1

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

Ranks #85 of 138 3.5 ton central heat pumps for cooling efficiency, and costs about $1,431 a year to run in a mixed climate like Atlanta.

SEER2: 16.0 Cooling efficiency over a season
Below average · beats 26%
HSPF2: 8.1 Heating efficiency over a season
Below average · beats 20%
EER2: 12.0 Cooling efficiency on a 95°F day
Average · beats 64%
Heat at 5°F: 22,400 BTU/h51% of its 47°F output
Very good · beats 85%

A good fit if…

You want a choice of indoor units - 54 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	Trane
Outdoor unit model	5TWX6048A1
Series	16 Single-Stage Heat Pump with WeatherGuard Top
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	February 16, 2026
Last certified	September 16, 2026
Cooling
SEER2Seasonal efficiency, higher is better	16.0 (range 15.2-16.0)
EER2Efficiency at 95°F outdoors	11.7-12.0
Cooling capacity	44,000-46,500 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8-8.1
Capacity at 47°F	42,000-44,000 BTU/h
Capacity at 17°F	28,400-29,000 BTU/h
Capacity at 5°F	21,800-22,400 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.14-2.28
ENERGY STAR cold climate	No

Heating output as it gets colder51% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with 5TXCC009AS3+TSTAT+P0V0C000M50SD at the standard test temperatures, in BTU/h:

Certified matchups54 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. 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.
5TXCC009AS3+TSTAT+P0V0C000M50SD	-	16.0	12.0	8.1	21,800	218110998
5TEMCD07AV51+TDR+TSTAT	-	16.0	12.0	8.1	21,800	218110949
5TEMCD06AV41+TDR+TSTAT	-	16.0	12.0	8.1	21,800	218110948
5PX*D010AS3+TSTAT+P0V0D000M50SD	-	16.0	12.0	8.1	21,800	218110914
5PX*D010AS3+TSTAT+P0V0C000M50SD	-	16.0	12.0	8.1	21,800	218110913
5PX*C009AS3+TSTAT+P0V0C000M50SD	-	16.0	12.0	8.1	21,800	218110859
5TEMCD07BV51+TDR+TSTAT	-	16.0	12.0	8.1	22,200	218788190
5TXCD010AS3+TSTAT+P0V0C000M50SD	-	16.0	12.0	7.8	21,800	218111038
5TEMCD04AV31+TDR+TSTAT	-	15.2	12.0	8.1	21,800	218112577
5TEM6D05AV41+TDR+TSTAT	-	15.2	11.7	8.1	22,000	218112576
5TXCD010AS3+TSTAT	S9X1D120U5PSB	15.2	12.0	8.1	22,000	218111047
5TXCD010AS3+TSTAT	S9X2D120U5PSB	15.2	12.0	8.1	22,000	218111046
5TXCD010AS3+TSTAT	S9V2C080U5VSB	15.2	11.7	8.1	22,000	218111034
5PX*D010AS3+TSTAT	S8X1D120M5PTC	15.2	12.0	8.1	22,000	218110927
5PX*D010AS3+TSTAT	S8X1D120M5PSC	15.2	12.0	8.1	22,000	218110926
5PX*D010AS3+TSTAT	S9X1D120U5PSB	15.2	12.0	8.1	22,000	218110922
5PX*D010AS3+TSTAT	S9V2C080U5VSB	15.2	11.7	8.1	22,000	218110919
5PX*D010AS3+TSTAT	S8X2D120M5PTC	15.2	12.0	8.1	22,000	218110918
5PX*D010AS3+TSTAT	S8X2D120M5PSC	15.2	12.0	8.1	22,000	218110917
5TEMCD05AV41+TDR+TSTAT	-	15.2	12.0	8.1	21,800	218159430
5TEM6D07AV51+TDR+TSTAT	-	15.2	12.0	8.1	21,800	218159429
5TEM6D06AV41+TDR+TSTAT	-	15.2	12.0	8.1	21,800	218159428
5PX*D010AS3+TSTAT	S9X2D120U5PSB	15.2	12.0	8.1	22,000	218159424
5PX*D010AS3+TSTAT	S9V2C100U5VSB	15.2	11.7	8.1	22,400	218396395
5PX*C009AS3+TSTAT	S9X2C100U5PSB	15.2	11.7	8.1	22,400	218396381
5TXCD010AS3+TSTAT	*UHMC100CCV4	15.2	12.0	8.1	22,400	218396308
5TXCD010AS3+TSTAT	S9V2C100U5VSB	15.2	11.7	8.1	22,400	218396306
5TXCD010AS3+TSTAT	*UHMD120CCV5	15.2	12.0	8.1	22,200	218396303
5TXCD010AS3+TSTAT	S9V2C100U4VSB	15.2	11.7	8.1	22,400	218396302
5TXCD010AS3+TSTAT	S9V2D120U5VSB	15.2	12.0	8.1	22,200	218396301
5TXCC009AS3+TSTAT	S9X2C100U5PSB	15.2	11.7	8.1	22,400	218396293
5TXCC009AS3+TSTAT	S9X1C100U5PSB	15.2	11.7	8.1	22,400	218396292
5TEM4D07AC51+TDR+TSTAT	-	15.2	12.0	8.1	22,400	218396288
5PX*DD10AS3+TSTAT+P0V0C000M50SD	-	15.2	12.0	8.1	22,000	218396286
5PX*DD10AS3+TSTAT+P0V0D000M50SD	-	15.2	12.0	8.1	22,000	218396285
5PX*C009AS3+TSTAT	S9X1C100U5PSB	15.2	11.7	8.1	22,400	218396272
5TXCD010AS3+TSTAT	S8X1D120M5PSC	15.2	12.0	8.0	22,000	218111043
5TXCD010AS3+TSTAT	S8X1D120M5PTC	15.2	12.0	8.0	22,000	218111042
5TXCD010AS3+TSTAT+P0V0D000M50SD	-	15.2	12.0	8.0	21,800	218111037
5TXCD010AS3+TSTAT	S8X2D120M5PTC	15.2	12.0	8.0	22,000	218111033
5TXCD010AS3+TSTAT	S8X2D120M5PSC	15.2	12.0	8.0	22,000	218111032
5PX*D010AS3+TSTAT	S8V2D120M5PDB	15.2	12.0	8.0	22,000	218110923
5PX*D010AS3+TSTAT	S8V2D120M5PCB	15.2	12.0	8.0	22,000	218159423
5PX*D010AS3+TSTAT	S8X1C100M5PTC	15.2	12.0	8.0	22,000	218396394
5PX*D010AS3+TSTAT	L8V1C100U5VSB	15.2	12.0	8.0	22,000	218396393
5PX*D010AS3+TSTAT	S8X1C100M5PSC	15.2	12.0	8.0	22,000	218396385
5PX*D010AS3+TSTAT	S8X2C100M5PSC	15.2	12.0	8.0	22,000	218396383
5TXCC009AS3+TSTAT	S9V2C080U5VSB	15.2	12.0	8.0	22,200	218396294
5PX*D010AS3+TSTAT	S8X2C100M5PTC	15.2	12.0	8.0	22,000	218396284
5PX*D010AS3+TSTAT	S9V2D120U5VSB	15.2	12.0	8.0	22,200	218396283
5PX*C009AS3+TSTAT	S9V2C080U5VSB	15.2	12.0	8.0	22,200	218396275
5TXCD010AS3+TSTAT	S8V2D120M5PDB	15.2	12.0	7.8	22,000	218111028
5TXCD010AS3+TSTAT	S8V2D120M5PCB	15.2	12.0	7.8	22,000	218111027
5TXCD010AS3+TSTAT	L8V1C100U5VSB	15.2	12.0	7.8	22,000	218111026

Yearly running cost in 10 large cities$1,319-$3,388

Phoenix, AZ$1,607/yr
Miami, FL$1,319/yr
Houston, TX$1,440/yr
Atlanta, GA$1,431/yr
Los Angeles, CA$1,387/yr
New York, NY$3,388/yr
Chicago, IL$2,744/yr
Denver, CO$2,277/yr
Seattle, WA$1,395/yr
Minneapolis, MN$2,816/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 Trane 5TWX6048A1?: The Trane 5TWX6048A1 is rated at up to 16.0 SEER2 and 12.0 EER2 for cooling and up to 8.1 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 54 certified matchups SEER2 ranges from 15.2-16.0.
Is the Trane 5TWX6048A1 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 Trane 5TWX6048A1 cost to run per year?: At its rated efficiency it costs about $1,319-$3,388 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,607 in Phoenix and $2,816 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 Trane 5TWX6048A1?: ENERGY STAR lists 54 certified combinations for this outdoor unit. The highest-rated ones use 5TXCC009AS3+TSTAT+P0V0C000M50SD, 5TEMCD07AV51+TDR+TSTAT, 5TEMCD06AV41+TDR+TSTAT.
What refrigerant does the Trane 5TWX6048A1 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 $1,585/yrYou save $703/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 Trane 5TWX6048A1

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: $1,585
Current system, per year: $2,288
You save per year: $703
Payback: 24.2 years
Net after 10 years: -$9,970

Cooling $990Heating $595Electricity used: 9,904 kWhSaved vs. a minimum-efficiency heat pump: $165

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

WeatherKing WP15AY42AJ2N · cold climate16.0 SEER2 · 8.1 HSPF2
Thermal Zone TZP15AY42AJ2N · cold climate16.0 SEER2 · 8.1 HSPF2
York YH2F42TB2116.0 SEER2 · 8.1 HSPF2
TCL THH48HES2NAGOH24 · cold climate16.0 SEER2 · 8.1 HSPF2
Armstrong Air 4SHP17LE142P-**A15.6 SEER2 · 8.3 HSPF2
Sure SP15AY42AJ2N · cold climate16.0 SEER2 · 8.1 HSPF2
Blueridge BHP17L42P-**A15.6 SEER2 · 8.3 HSPF2
Ruud RP15AY42AJ2N · cold climate16.0 SEER2 · 8.1 HSPF2

See all 138 3.5 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of September 16, 2026. How we use the data.