What is the SEER2 rating of the Trane 5TWR5042A1?

The Trane 5TWR5042A1 is rated at up to 17.0 SEER2 and 12.0 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 293 certified matchups SEER2 ranges from 15.2-17.0.

Is the Trane 5TWR5042A1 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 5TWR5042A1 cost to run per year?

At its rated efficiency it costs about $1,105-$2,939 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,360 in Phoenix and $2,454 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the Trane 5TWR5042A1 the same as the American Standard 5A6H5042A1?

Yes, as far as the certified ratings go. ENERGY STAR lists both 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 Trane 5TWR5042A1?

ENERGY STAR lists 293 certified combinations for this outdoor unit. The highest-rated ones use 5PX*D010AS3+TSTAT+P0V0D000M50SD, 5TXCD010AS3+TSTAT, 5TXCD010AS3+TSTAT+P0V0D000M50SD.

3.5-ton central heat pump · 15 Single-Stage Heat Pump

Trane 5TWR5042A1

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

Ranks #39 of 138 3.5 ton central heat pumps for cooling efficiency, and costs about $1,231 a year to run in a mixed climate like Atlanta.

SEER2: 17.0 Cooling efficiency over a season
Average · beats 49%
HSPF2: 8.5 Heating efficiency over a season
Below average · beats 38%
EER2: 12.0 Cooling efficiency on a 95°F day
Average · beats 64%
Heat at 5°F: 20,000 BTU/h49% of its 47°F output
Very good · beats 88%

A good fit if…

You want a choice of indoor units - 293 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.
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
Also sold as	American Standard
Outdoor unit model	5TWR5042A1
Series	15 Single-Stage Heat Pump
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 25, 2024
Last certified	June 16, 2026
Cooling
SEER2Seasonal efficiency, higher is better	17.0 (range 15.2-17.0)
EER2Efficiency at 95°F outdoors	11.7-12.0
Cooling capacity	37,400-41,500 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8-8.5
Capacity at 47°F	37,400-40,500 BTU/h
Capacity at 17°F	24,600-26,400 BTU/h
Capacity at 5°F	18,700-20,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.00-2.30
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 5PX*D010AS3+TSTAT+P0V0D000M50SD at the standard test temperatures, in BTU/h:

Certified matchups293 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 293 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*D010AS3+TSTAT+P0V0D000M50SD	-	17.0	12.0	8.1	19,100	215569110
5TXCD010AS3+TSTAT	S9V2D120U5PSC	16.5	12.0	8.1	19,000	214078953
5TXCD010AS3+TSTAT	S9V2D120U5VSB	16.5	12.0	8.1	18,900	214078957
5TXCD010AS3+TSTAT+P0V0D000M50SD	-	16.5	12.0	8.1	18,800	214078963
5PX*C009AS3+TSTAT+P0V0C000M50SD	-	16.5	12.0	8.1	19,000	215574170
5PX*C007AS3+TSTAT+P0V0C000M50SD	-	16.5	12.0	8.1	19,400	215568900
5PX*C009AS3+TSTAT	L8V1C100U5VSB	16.5	12.0	8.1	19,100	215568962
5PX*CD09AS3+TSTAT	S9V2C100D4VSB	16.5	12.0	8.1	19,700	215569032
5PX*D008AS3+TSTAT+P0V0D000M50SD	-	16.5	12.0	8.1	19,200	215569078
5PX*D010AS3+TSTAT	S8V2D120M5PDB	16.5	12.0	8.1	19,300	215569106
5PX*D010AS3+TSTAT	S8V2D120M5PCB	16.5	12.0	8.1	19,300	215569108
5PX*D010AS3+TSTAT	S9V2D120U5VSB	16.5	12.0	8.1	19,400	215569116
5PX*D010AS3+TSTAT	S9V2D120U5PSC	16.5	12.0	8.1	19,400	215569118
5PX*DD10AS3+TSTAT+P0V0D000M50SD	-	16.5	12.0	8.1	19,100	215569124
5TXCC009AS3+TSTAT	L8V1C100U5VSB	16.5	12.0	8.1	19,100	215566554
5TXCD008AS3+TSTAT+P0V0D000M50SD	-	16.5	12.0	8.1	19,200	215566594
5TXCC009AS3+TSTAT+P0V0C000M50SD	-	16.5	12.0	8.1	19,000	215566522
5TEMCD06AV41+TDR+TSTAT	-	16.5	12.0	8.1	18,700	215863946
5TEMCD07AV51+TDR+TSTAT	-	16.5	12.0	8.1	18,700	215863948
5PX*CD09AS3+TSTAT+P0V0C000M50SD	-	16.5	12.0	8.0	19,100	215569044
5TEM6D04AV31+TDR+TSTAT	-	16.0	12.0	8.5	19,100	214078807
5TEM6D06AV41+TDR+TSTAT	-	16.0	12.0	8.5	19,400	214078809
5TEM6D07AV51+TDR+TSTAT	-	16.0	12.0	8.5	19,400	214078811
5TEMCD05AV41+TDR+TSTAT	-	16.0	12.0	8.5	18,900	215863944
5TXCD010AS3+TSTAT	S8V2D120M5PCB	16.0	12.0	8.1	19,100	214078975
5TXCC007AS3+TSTAT	S8X2C080M5PTC	16.0	12.0	8.1	19,300	214078891
5TXCC007AS3+TSTAT	S8X2C100M5PSC	16.0	12.0	8.1	19,400	214078893
5TXCC007AS3+TSTAT	S8V2C100M5PCB	16.0	12.0	8.1	19,400	214078875
5TXCC007AS3+TSTAT	S8V2C100M5PDB	16.0	12.0	8.1	19,400	214078879
5TXCC007AS3+TSTAT	S8X1C080M5PSC	16.0	12.0	8.1	19,300	214078881
5TXCC007AS3+TSTAT	S8X1C080M5PTC	16.0	12.0	8.1	19,300	214078883
5TXCC007AS3+TSTAT	S8X1C100M5PSC	16.0	12.0	8.1	19,400	214078885
5TXCC007AS3+TSTAT	S8X1C100M5PTC	16.0	12.0	8.1	19,400	214078887
5TXCC007AS3+TSTAT	S8X2C080M5PSC	16.0	12.0	8.1	19,300	214078889
5TXCD010AS3+TSTAT	*UHMD120CCV5	16.0	12.0	8.1	19,000	214078967
5TXCD010AS3+TSTAT	*UHMD120ACV5	16.0	12.0	8.1	19,000	214078969
5TXCD010AS3+TSTAT	S8V2D120M5PDA	16.0	12.0	8.1	19,100	214078971
5TXCD010AS3+TSTAT	S8V2D120M5PCA	16.0	12.0	8.1	19,100	214078973
5TXCC007AS3+TSTAT	S8X2C100M5PTC	16.0	12.0	8.1	19,400	214078895
5TXCC007AS3+TSTAT	S9V2C080U5PSC	16.0	12.0	8.1	19,300	214078899
5TXCC007AS3+TSTAT	S9V2C100U4VSA	16.0	12.0	8.1	19,300	214078901
5TXCC007AS3+TSTAT	S9V2C100U4VSB	16.0	12.0	8.1	19,300	214078903
5TXCC007AS3+TSTAT	S9V2C100U5PSC	16.0	12.0	8.1	19,200	214078907
5TXCC007AS3+TSTAT	S8V2C080M5PDB	16.0	12.0	8.1	19,400	214078917
5TXCC007AS3+TSTAT	S8V2C080M5PCB	16.0	12.0	8.1	19,400	214078921
5TXCC007AS3+TSTAT+P0V0C000M50SD	-	16.0	12.0	8.1	19,100	214078925
5TXCC007AS3+TSTAT+P0V0C000M50SC	-	16.0	12.0	8.1	19,100	214078927
5TXCC007AS3+TSTAT	L8V1C100U5VSB	16.0	12.0	8.1	19,200	214078931
5TXCD010AS3+TSTAT	S8V2D120M5PDB	16.0	12.0	8.1	19,100	214078941
5TXCD010AS3+TSTAT	S8X1D120M5PSC	16.0	12.0	8.1	19,100	214078943
5TXCD010AS3+TSTAT	S8X1D120M5PTC	16.0	12.0	8.1	19,100	214078945
5TXCD010AS3+TSTAT	S8X2D120M5PSC	16.0	12.0	8.1	19,100	214078947
5TXCD010AS3+TSTAT	S8X2D120M5PTC	16.0	12.0	8.1	19,100	214078949
5TXCD010AS3+TSTAT	S9V2D120U5PSB	16.0	12.0	8.1	18,900	214078951
5TXCD010AS3+TSTAT	S9V2D120U5VSA	16.0	12.0	8.1	18,900	214078955
5TXCD010AS3+TSTAT	S9X1D120U5PSB	16.0	12.0	8.1	18,800	214078959
5TXCD010AS3+TSTAT	S9X2D120U5PSB	16.0	12.0	8.1	18,800	214078961
5PX*B006AS3+TSTAT+P0V0B000M40SD	-	16.0	12.0	8.1	19,600	215568800
5PX*C007AS3+TSTAT	*UHMC100CCV4	16.0	12.0	8.1	19,200	215574168
5PX*C007AS3+TSTAT	S8V2C080M5PCB	16.0	12.0	8.1	19,300	215568898

Same unit, other model numbers1

These model numbers have exactly the same certified ratings and matchups as the Trane 5TWR5042A1: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

American Standard 5A6H5042A1

Yearly running cost in 10 large cities$1,105-$2,939

Phoenix, AZ$1,360/yr
Miami, FL$1,105/yr
Houston, TX$1,219/yr
Atlanta, GA$1,231/yr
Los Angeles, CA$1,198/yr
New York, NY$2,939/yr
Chicago, IL$2,386/yr
Denver, CO$1,983/yr
Seattle, WA$1,218/yr
Minneapolis, MN$2,454/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 Trane 5TWR5042A1?: The Trane 5TWR5042A1 is rated at up to 17.0 SEER2 and 12.0 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 293 certified matchups SEER2 ranges from 15.2-17.0.
Is the Trane 5TWR5042A1 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 5TWR5042A1 cost to run per year?: At its rated efficiency it costs about $1,105-$2,939 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,360 in Phoenix and $2,454 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the Trane 5TWR5042A1 the same as the American Standard 5A6H5042A1?: Yes, as far as the certified ratings go. ENERGY STAR lists both 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 Trane 5TWR5042A1?: ENERGY STAR lists 293 certified combinations for this outdoor unit. The highest-rated ones use 5PX*D010AS3+TSTAT+P0V0D000M50SD, 5TXCD010AS3+TSTAT, 5TXCD010AS3+TSTAT+P0V0D000M50SD.
What refrigerant does the Trane 5TWR5042A1 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 $1,349/yrYou save $706/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 5TWR5042A1

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: $1,349
Current system, per year: $2,054
You save per year: $706
Payback: 21.3 years
Net after 10 years: -$7,944

Cooling $828Heating $520Electricity used: 8,429 kWhSaved vs. a minimum-efficiency heat pump: $226

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.

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Midea MOVC-60HDN10-M16G · cold climate17.0 SEER2 · 8.5 HSPF2
DuraSTAR DRU1H42S2A · cold climate16.7 SEER2 · 9.5 HSPF2
Daikin DZ6VSA481EA · cold climate17.0 SEER2 · 8.5 HSPF2
Mainline ML42HP230LMNTH-O · cold climate16.7 SEER2 · 9.5 HSPF2
Bosch BOVB-60RTB-M15S · cold climate17.0 SEER2 · 8.5 HSPF2
MDV MOX630-42HFN10-M3X-D · cold climate16.7 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 16, 2026. How we use the data.