What is the SEER2 rating of the Trane 5TWX6036A1?

The Trane 5TWX6036A1 is rated at up to 16.5 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 374 certified matchups SEER2 ranges from 15.2-16.5.

Is the Trane 5TWX6036A1 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-ton model.

How much does the Trane 5TWX6036A1 cost to run per year?

At its rated efficiency it costs about $966-$2,463 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,175 in Phoenix and $2,045 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 5TWX6036A1?

ENERGY STAR lists 374 certified combinations for this outdoor unit. The highest-rated ones use 5TEMCD07AV51+TDR+TSTAT, 5TXCD010AS3+TSTAT, 5TXCD008AS3+TSTAT.

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

Trane 5TWX6036A1

Average cooling efficiency and below average heating efficiency for a 3-ton central heat pump, but not rated for cold climates.

Ranks #203 of 302 3 ton central heat pumps for cooling efficiency, and costs about $1,042 a year to run in a mixed climate like Atlanta.

SEER2: 16.5 Cooling efficiency over a season
Average · beats 40%
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: 17,700 BTU/h55% of its 47°F output
Excellent · beats 98%

A good fit if…

You want a choice of indoor units - 374 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 ton, R-454B

General
Brand	Trane
Outdoor unit model	5TWX6036A1
Series	16 Single-Stage Heat Pump with WeatherGuard Top
Type	Central heat pump
Nominal size	3 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	June 12, 2026
Cooling
SEER2Seasonal efficiency, higher is better	16.5 (range 15.2-16.5)
EER2Efficiency at 95°F outdoors	11.2-12.0
Cooling capacity	32,000-35,400 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8-8.1
Capacity at 47°F	29,800-32,400 BTU/h
Capacity at 17°F	21,000-22,200 BTU/h
Capacity at 5°F	16,900-17,700 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.22-2.48
ENERGY STAR cold climate	No

Heating output as it gets colder55% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with 5TEMCD07AV51+TDR+TSTAT at the standard test temperatures, in BTU/h:

Certified matchups374 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 374 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.
5TEMCD07AV51+TDR+TSTAT	-	16.5	12.0	8.1	17,000	218110467
5TXCD010AS3+TSTAT	S8X2D120M5PSC	16.0	12.0	8.1	17,300	218110599
5TXCD010AS3+TSTAT	S9V2D120U5VSB	16.0	12.0	8.1	17,200	218110598
5TXCD010AS3+TSTAT	S8X1D120M5PSC	16.0	12.0	8.1	17,300	218110595
5TXCD010AS3+TSTAT	S8X1D120M5PTC	16.0	12.0	8.1	17,300	218110594
5TXCD010AS3+TSTAT	S8V2D120M5PDB	16.0	12.0	8.1	17,200	218110593
5TXCD010AS3+TSTAT	S8X2D120M5PTC	16.0	12.0	8.1	17,300	218110592
5TXCD010AS3+TSTAT	*UHMD120CCV5	16.0	12.0	8.1	17,000	218110591
5TXCD008AS3+TSTAT	S9V2D120U5VSB	16.0	12.0	8.1	17,200	218110590
5TXCD008AS3+TSTAT	S8X1D120M5PTC	16.0	12.0	8.1	17,400	218110589
5TXCD008AS3+TSTAT	S8X2D120M5PSC	16.0	12.0	8.1	17,400	218110588
5TXCD008AS3+TSTAT	S8X2D120M5PTC	16.0	12.0	8.1	17,400	218110587
5TXCD008AS3+TSTAT	*UHMD120CCV5	16.0	12.0	8.1	17,000	218110586
5TXCD008AS3+TSTAT	S8V2D120M5PCB	16.0	12.0	8.1	17,200	218110583
5TXCD008AS3+TSTAT	S8V2D120M5PDB	16.0	12.0	8.1	17,200	218110582
5TXCD008AS3+TSTAT	S8X1D120M5PSC	16.0	12.0	8.1	17,400	218110581
5TXCC009AS3+TSTAT	S8X1C080M5PTC	16.0	12.0	8.1	17,200	218110580
5TXCC009AS3+TSTAT	S8X1C100M5PSC	16.0	12.0	8.1	17,300	218110579
5TXCC009AS3+TSTAT	S8X1C100M5PTC	16.0	12.0	8.1	17,300	218110578
5TXCC009AS3+TSTAT	S8X2C080M5PSC	16.0	12.0	8.1	17,200	218110577
5TXCC009AS3+TSTAT	S8X2C080M5PTC	16.0	12.0	8.1	17,200	218110576
5TXCC009AS3+TSTAT	S9V2C100U5VSB	16.0	12.0	8.1	16,900	218110575
5TXCC009AS3+TSTAT	S8V2C100M5PDB	16.0	12.0	8.1	17,200	218110574
5TXCC009AS3+TSTAT	S8V2C100M5PCB	16.0	12.0	8.1	17,200	218110573
5TXCC009AS3+TSTAT+P0V0C000M50SD	-	16.0	12.0	8.1	16,900	218110572
5TXCC009AS3+TSTAT	L8V1C100U5VSB	16.0	12.0	8.1	17,000	218110571
5TXCC009AS3+TSTAT	*UHMC100CCV4	16.0	12.0	8.1	16,900	218110570
5TXCC009AS3+TSTAT	S9X1C080U5PSB	16.0	12.0	8.1	17,200	218110569
5TXCC009AS3+TSTAT	S9X2C080U5PSB	16.0	12.0	8.1	17,200	218110567
5TXCC009AS3+TSTAT	S9V2C100U4VSB	16.0	12.0	8.1	16,900	218110565
5TXCC009AS3+TSTAT	S9V2C080U5VSB	16.0	12.0	8.1	17,200	218110564
5TXCC009AS3+TSTAT	S8X1C080M5PSC	16.0	12.0	8.1	17,200	218110563
5TXCC009AS3+TSTAT	S8X2C100M5PSC	16.0	12.0	8.1	17,300	218110562
5TXCC007AS3+TSTAT	S9X1C080U5PSB	16.0	12.0	8.1	17,300	218110561
5TXCC007AS3+TSTAT	S9X2C080U5PSB	16.0	12.0	8.1	17,300	218110559
5TXCC007AS3+TSTAT+P0V0C000M50SD	-	16.0	12.0	8.1	17,100	218110557
5TXCC007AS3+TSTAT	*UHMC100CCV4	16.0	12.0	8.1	17,000	218110548
5TEMCD06AV41+TDR+TSTAT	-	16.0	12.0	8.1	16,900	218110466
5TEMCD05AV41+TDR+TSTAT	-	16.0	12.0	8.1	17,000	218110465
5TEMCD04AV31+TDR+TSTAT	-	16.0	12.0	8.1	17,000	218110464
5TEM6D07AV51+TDR+TSTAT	-	16.0	12.0	8.1	17,100	218110462
5TEM6D06AV41+TDR+TSTAT	-	16.0	12.0	8.1	17,100	218110461
5TEM6D04AV31+TDR+TSTAT	-	16.0	12.0	8.1	17,300	218110459
5TAMXD07AV51+TSTAT	-	16.0	12.0	8.1	16,900	218110454
5TAMXD06AV41+TSTAT	-	16.0	12.0	8.1	17,100	218110453
5TAMXD05AV41+TSTAT	-	16.0	12.0	8.1	17,100	218110452
5TAM5D06AC41+TSTAT	-	16.0	12.0	8.1	17,100	218110449
5TAM5D05AC31+TSTAT	-	16.0	12.0	8.1	17,200	218110448
5PX*DD10AS3+TSTAT	S8X1D120M5PTC	16.0	12.0	8.1	17,300	218110445
5PX*DD10AS3+TSTAT	S8X2D120M5PTC	16.0	12.0	8.1	17,300	218110444
5PX*DD10AS3+TSTAT	S8X1D120M5PSC	16.0	12.0	8.1	17,300	218110442
5PX*D010AS3+TSTAT	S8X2D120M5PSC	16.0	12.0	8.1	17,300	218110440
5PX*D010AS3+TSTAT	S8X1D120M5PTC	16.0	12.0	8.1	17,300	218110439
5PX*D010AS3+TSTAT	S8X1D120M5PSC	16.0	12.0	8.1	17,300	218110438
5PX*D010AS3+TSTAT	S8V2D120M5PDB	16.0	12.0	8.1	17,200	218110437
5PX*D010AS3+TSTAT	S8V2D120M5PCB	16.0	12.0	8.1	17,200	218110436
5PX*D010AS3+TSTAT	*UHMD120CCV5	16.0	12.0	8.1	17,000	218110435
5PX*D010AS3+TSTAT	S9V2D120U5VSB	16.0	12.0	8.1	17,200	218110433
5PX*D010AS3+TSTAT	S8X2D120M5PTC	16.0	12.0	8.1	17,300	218110432
5PX*D008AS3+TSTAT	S9V2D120U5VSB	16.0	12.0	8.1	17,200	218110431

Yearly running cost in 10 large cities$966-$2,463

Phoenix, AZ$1,175/yr
Miami, FL$966/yr
Houston, TX$1,052/yr
Atlanta, GA$1,042/yr
Los Angeles, CA$1,009/yr
New York, NY$2,463/yr
Chicago, IL$1,994/yr
Denver, CO$1,654/yr
Seattle, WA$1,013/yr
Minneapolis, MN$2,045/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 5TWX6036A1?: The Trane 5TWX6036A1 is rated at up to 16.5 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 374 certified matchups SEER2 ranges from 15.2-16.5.
Is the Trane 5TWX6036A1 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-ton model.
How much does the Trane 5TWX6036A1 cost to run per year?: At its rated efficiency it costs about $966-$2,463 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,175 in Phoenix and $2,045 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 5TWX6036A1?: ENERGY STAR lists 374 certified combinations for this outdoor unit. The highest-rated ones use 5TEMCD07AV51+TDR+TSTAT, 5TXCD010AS3+TSTAT, 5TXCD008AS3+TSTAT.
What refrigerant does the Trane 5TWX6036A1 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 $1,157/yrYou save $551/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 5TWX6036A1

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: $1,157
Current system, per year: $1,707
You save per year: $551
Payback: 23.6 years
Net after 10 years: -$7,494

Cooling $725Heating $431Electricity used: 7,230 kWhSaved vs. a minimum-efficiency heat pump: $146

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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1HVAC ACIQ-36-HPC · cold climate16.3 SEER2 · 9.5 HSPF2
AI AIR CONDITIONING AUO18-36N1-M3H · cold climate16.3 SEER2 · 9.5 HSPF2
ComfortStar CPH36CD(O)-B · cold climate16.3 SEER2 · 9.5 HSPF2
ECO-AIR MOX630-36HFN1-M3X · cold climate16.3 SEER2 · 9.5 HSPF2
Tempstar T5H8T36*K*AAA16.5 SEER2 · 8.5 HSPF2

See all 302 3 ton central heat pumps, ranked

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