What is the SEER2 rating of the Trane 5TWX7048A1?

The Trane 5TWX7048A1 is rated at up to 17.1 SEER2 and 12.0 EER2 for cooling and up to 9.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 220 certified matchups SEER2 ranges from 15.2-17.1.

Is the Trane 5TWX7048A1 good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 33,200 BTU/h at 5°F with a COP of 2.23, so it is still 2.2 times as efficient as electric resistance heat at that temperature.

How much does the Trane 5TWX7048A1 cost to run per year?

At its rated efficiency it costs about $1,194-$3,109 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,460 in Phoenix and $2,588 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 5TWX7048A1?

ENERGY STAR lists 220 certified combinations for this outdoor unit. The highest-rated ones use 5PX*C009AS3, 5PX*D010AS3, 5PX*D008AS3.

3.5-ton central heat pump · 17 Multi-Speed Heat Pump with WeatherGuard Top

Trane 5TWX7048A1

Average cooling and heating efficiency for a 3.5-ton central heat pump, and certified for cold climates.

Ranks #32 of 138 3.5 ton central heat pumps for cooling efficiency, and costs about $1,309 a year to run in a mixed climate like Atlanta.

SEER2: 17.1 Cooling efficiency over a season
Average · beats 53%
HSPF2: 9.0 Heating efficiency over a season
Average · beats 54%
EER2: 12.0 Cooling efficiency on a 95°F day
Average · beats 64%
Heat at 5°F: 33,200 BTU/h74% of its 47°F output
Very good · beats 80%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 33,200 BTU/h at 5°F.
You want a choice of indoor units - 220 certified pairings.

Think twice if…

Nothing stands out - its ratings have no weak spot for its class.

Calculate my running cost

Details

Specifications3.5 ton, R-454B

General
Brand	Trane
Outdoor unit model	5TWX7048A1
Series	17 Multi-Speed Heat Pump with WeatherGuard Top
Type	Central heat pump
Nominal size	3.5 ton
CompressorVariable-speed units run longer at low power	Two-stage
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	January 15, 2025
Last certified	June 12, 2026
Cooling
SEER2Seasonal efficiency, higher is better	17.1 (range 15.2-17.1)
EER2Efficiency at 95°F outdoors	11.2-12.7
Cooling capacity	43,000-44,500 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.5-9.0
Capacity at 47°F	43,500-45,500 BTU/h
Capacity at 17°F	28,800-39,500 BTU/h
Capacity at 5°F	31,800-33,200 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.10-2.23
ENERGY STAR cold climate	Yes

Heating output as it gets colder74% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with 5PX*C009AS3 at the standard test temperatures, in BTU/h:

Certified matchups220 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 220 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.
5PX*C009AS3	S9V2C080U5PSC	17.1	12.0	9.0	32,000	216764427
5PX*D010AS3	S9V2D120U5PSC	17.1	12.0	9.0	32,000	216764447
5PX*D010AS3	S9V2D120U5VSB	17.1	12.0	9.0	32,000	216764446
5PX*D008AS3	S8X1D120M5PSC	17.1	12.0	9.0	32,800	216764438
5PX*D010AS3	S9V2C080U5PSC	17.1	12.0	9.0	32,000	216764450
5PX*D010AS3	S8X1D120M5PSC	17.1	12.0	9.0	32,400	216764451
5PX*D010AS3	S8X1C100M5PSC	17.1	12.0	9.0	32,200	216764452
5TEMCD06AV41+TDR	-	17.1	12.7	9.0	31,800	216764460
5PX*DD10AS3	S8X1D120M5PSC	17.1	11.7	9.0	32,600	216764456
5TEM6D07AV51+TDR	-	17.1	12.5	9.0	31,800	216764459
5TEMCD07AV51+TDR	-	17.1	12.7	9.0	31,800	216764461
5TEM6D06AV41+TDR	-	17.1	12.5	9.0	31,800	216764458
5TXCC009AS3	S9V2C080U5PSC	17.1	12.0	9.0	32,000	216764465
5TXCD008AS3	S8X1D120M5PSC	17.1	12.0	9.0	32,800	216764477
5TXCD010AS3	S8X1C100M5PSC	17.1	12.0	9.0	32,200	216764489
5TXCD010AS3	S9V2D120U5VSB	17.1	12.0	9.0	32,000	216764483
5TXCD010AS3	S8X1D120M5PSC	17.1	12.0	9.0	32,400	216764484
5TXCD010AS3	S9V2D120U5PSC	17.1	12.0	9.0	32,000	216764488
5TXCD010AS3	S9V2C080U5PSC	17.1	12.0	9.0	32,000	216764485
5PX*D010AS3	S8X2C100M5PSC	17.1	12.0	9.0	32,200	216765046
5PX*D008AS3	S8X1D120M5PTC	17.1	12.0	9.0	32,800	216765044
5PX*D008AS3	S8X2D120M5PTC	17.1	12.0	9.0	32,800	216765041
5PX*D008AS3	S8X2D120M5PSC	17.1	12.0	9.0	32,800	216765039
5PX*D010AS3	S8X1C100M5PTC	17.1	12.0	9.0	32,200	216765052
5PX*D010AS3	S8X1D120M5PTC	17.1	12.0	9.0	32,400	216765053
5PX*D010AS3	S8X2D120M5PTC	17.1	12.0	9.0	32,400	216765050
5PX*D010AS3	S8X2D120M5PSC	17.1	12.0	9.0	32,400	216765047
5PX*D010AS3	S8X2C100M5PTC	17.1	12.0	9.0	32,200	216765049
5PX*DD10AS3	S8X2D120M5PSC	17.1	11.7	9.0	32,600	216765055
5PX*DD10AS3	S8X1D120M5PTC	17.1	11.7	9.0	32,600	216765056
5PX*DD10AS3	S8X2D120M5PTC	17.1	11.7	9.0	32,600	216765058
5TXCD010AS3	S8X1C100M5PTC	17.1	12.0	9.0	32,200	216765073
5TXCD008AS3	S8X2D120M5PTC	17.1	12.0	9.0	32,800	216765066
5TXCD008AS3	S8X2D120M5PSC	17.1	12.0	9.0	32,800	216765069
5TXCD008AS3	S8X1D120M5PTC	17.1	12.0	9.0	32,800	216765067
5TXCD010AS3	S8X2C100M5PSC	17.1	12.0	9.0	32,200	216765079
5TXCD010AS3	S8X2C100M5PTC	17.1	12.0	9.0	32,200	216765080
5TXCD010AS3	S8X2D120M5PSC	17.1	12.0	9.0	32,400	216765077
5TXCD010AS3	S8X1D120M5PTC	17.1	12.0	9.0	32,400	216765078
5TXCD010AS3	S8X2D120M5PTC	17.1	12.0	9.0	32,400	216765075
5PX*C009AS3	L8V1C100U5VSB	17.0	12.0	9.0	32,000	216764421
5PX*C009AS3 · cold climate	S8X1C100M5PSC	17.0	12.0	9.0	32,200	216764426
5PX*D008AS3 · cold climate	S8X1C100M5PSC	17.0	11.7	9.0	33,000	216764437
5PX*D008AS3	S9V2D120U5VSB	17.0	12.0	9.0	32,400	216764441
5PX*D010AS3	L8V1C100U5VSB	17.0	12.0	9.0	32,000	216764442
5PX*D008AS3	S9V2D120U5PSC	17.0	12.0	9.0	32,400	216764439
5PX*D010AS3	*UHMC100CCV4	17.0	12.0	9.0	32,000	216764444
5PX*D010AS3	S8X1C080M5PSC	17.0	12.0	9.0	32,200	216764453
5PX*D010AS3 · cold climate	S9V2C100U5PSC	17.0	12.0	9.0	32,000	216764448
5PX*D010AS3 · cold climate	S9V2C100U4VSB	17.0	12.0	9.0	32,000	216764449
5TXCC009AS3 · cold climate	S8X1C100M5PSC	17.0	12.0	9.0	32,200	216764468
5TXCC009AS3	L8V1C100U5VSB	17.0	12.0	9.0	32,000	216764469
5TXCD008AS3	S9V2D120U5PSC	17.0	12.0	9.0	32,400	216764471
5TXCD008AS3 · cold climate	S8X1C100M5PSC	17.0	11.7	9.0	33,000	216764476
5TXCD008AS3	S9V2D120U5VSB	17.0	12.0	9.0	32,400	216764472
5TXCD010AS3	*UHMC100CCV4	17.0	12.0	9.0	32,000	216764478
5TXCD010AS3	L8V1C100U5VSB	17.0	12.0	9.0	32,000	216764480
5TXCD010AS3	S8X1C080M5PSC	17.0	12.0	9.0	32,200	216764482
5PX*C009AS3 · cold climate	S8X1C100M5PTC	17.0	12.0	9.0	32,200	216765028
5PX*C009AS3 · cold climate	S8X2C100M5PSC	17.0	12.0	9.0	32,200	216765031

Yearly running cost in 10 large cities$1,194-$3,109

Phoenix, AZ$1,460/yr
Miami, FL$1,194/yr
Houston, TX$1,308/yr
Atlanta, GA$1,309/yr
Los Angeles, CA$1,270/yr
New York, NY$3,109/yr
Chicago, IL$2,520/yr
Denver, CO$2,093/yr
Seattle, WA$1,284/yr
Minneapolis, MN$2,588/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 5TWX7048A1?: The Trane 5TWX7048A1 is rated at up to 17.1 SEER2 and 12.0 EER2 for cooling and up to 9.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 220 certified matchups SEER2 ranges from 15.2-17.1.
Is the Trane 5TWX7048A1 good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 33,200 BTU/h at 5°F with a COP of 2.23, so it is still 2.2 times as efficient as electric resistance heat at that temperature.
How much does the Trane 5TWX7048A1 cost to run per year?: At its rated efficiency it costs about $1,194-$3,109 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,460 in Phoenix and $2,588 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 5TWX7048A1?: ENERGY STAR lists 220 certified combinations for this outdoor unit. The highest-rated ones use 5PX*C009AS3, 5PX*D010AS3, 5PX*D008AS3.
What refrigerant does the Trane 5TWX7048A1 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 $1,443/yrYou save $808/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 5TWX7048A1

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: $1,443
Current system, per year: $2,251
You save per year: $808
Payback: 20.4 years
Net after 10 years: -$8,418

Cooling $895Heating $548Electricity used: 9,019 kWhSaved vs. a minimum-efficiency heat pump: $285

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

Daikin DZ6VSA421EA · cold climate17.0 SEER2 · 8.6 HSPF2
ECOER EODA17H-4860AD · cold climate17.5 SEER2 · 8.8 HSPF2
Bosch BOVA-60RXB-M15S · cold climate17.0 SEER2 · 8.5 HSPF2
Daikin DH7VSA4210A · cold climate17.5 SEER2 · 8.8 HSPF2
Bosch BOVB-60RTB-M15S · cold climate17.0 SEER2 · 8.5 HSPF2
MRCOOL UHP18048-O · cold climate17.5 SEER2 · 9.5 HSPF2
Daikin DZ6VSA481EA · cold climate17.0 SEER2 · 8.5 HSPF2
Midea MO1HE-H48B-2A · cold climate17.5 SEER2 · 9.5 HSPF2

See all 138 3.5 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of June 12, 2026. How we use the data.