What is the SEER2 rating of the Trane 5TWX5036A1?

The Trane 5TWX5036A1 is rated at up to 16.5 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 444 certified matchups SEER2 ranges from 15.2-16.5.

Is the Trane 5TWX5036A1 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 5TWX5036A1 cost to run per year?

At its rated efficiency it costs about $960-$2,380 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,157 in Phoenix and $1,968 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 5TWX5036A1?

ENERGY STAR lists 444 certified combinations for this outdoor unit. The highest-rated ones use 5TXCD010AS3+TSTAT, 5PX*D010AS3+TSTAT, 5PX*C009AS3+TSTAT+P0V0C000M50SD.

3-ton central heat pump · 15 Single-Stage Heat Pump with WeatherGuard Top

Trane 5TWX5036A1

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

Ranks #200 of 302 3 ton central heat pumps for cooling efficiency, and costs about $1,014 a year to run in a mixed climate like Atlanta.

SEER2: 16.5 Cooling efficiency over a season
Average · beats 40%
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: 17,700 BTU/h55% of its 47°F output
Excellent · beats 95%

A good fit if…

You want a choice of indoor units - 444 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	5TWX5036A1
Series	15 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 1, 2024
Last certified	June 3, 2026
Cooling
SEER2Seasonal efficiency, higher is better	16.5 (range 15.2-16.5)
EER2Efficiency at 95°F outdoors	11.7-12.0
Cooling capacity	31,800-35,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8-8.5
Capacity at 47°F	29,800-32,600 BTU/h
Capacity at 17°F	20,800-22,200 BTU/h
Capacity at 5°F	16,600-17,700 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.10-2.40
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 5TXCD010AS3+TSTAT at the standard test temperatures, in BTU/h:

Certified matchups444 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 444 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.
5TXCD010AS3+TSTAT	S9V2D120U5VSB	16.5	12.0	8.1	16,900	214182663
5TXCD010AS3+TSTAT	S9V2D120U5PSC	16.5	12.0	8.1	16,900	214182668
5PX*D010AS3+TSTAT	S8V2D120M5PCB	16.5	12.0	8.1	17,300	215687086
5PX*D010AS3+TSTAT	S8V2D120M5PDB	16.5	12.0	8.1	17,300	215687087
5PX*D010AS3+TSTAT	S9V2D120U5PSC	16.5	12.0	8.1	17,200	215687092
5PX*D010AS3+TSTAT	S9V2D120U5VSB	16.5	12.0	8.1	17,200	215687093
5PX*C009AS3+TSTAT+P0V0C000M50SD	-	16.5	12.0	8.1	17,200	215686999
5PX*C009AS3+TSTAT	L8V1C100U5VSB	16.5	12.0	8.1	17,200	215687015
5PX*CD09AS3+TSTAT+P0V0C000M50SD	-	16.5	12.0	8.1	17,200	215687062
5TXCC009AS3+TSTAT	L8V1C100U5VSB	16.5	12.0	8.1	17,200	215687175
5TXCC009AS3+TSTAT+P0V0C000M50SD	-	16.5	12.0	8.1	17,200	215687178
5TEMCD06AV41+TDR+TSTAT	-	16.5	12.0	8.1	16,900	215863977
5TEMCD07AV51+TDR+TSTAT	-	16.5	12.0	8.1	16,900	215863978
5TEM6D04AV31+TDR+TSTAT	-	16.0	12.0	8.5	17,500	214182337
5TEM6D06AV41+TDR+TSTAT	-	16.0	12.0	8.5	17,400	214182339
5TEM6D07AV51+TDR+TSTAT	-	16.0	12.0	8.5	17,500	214182340
5TXCD008AS3+TSTAT	S9V2D120U5VSB	16.0	12.0	8.5	17,400	215687193
5PX*C007AS3+TSTAT+P0V0C000M50SD	-	16.0	12.0	8.5	17,300	215686978
5PX*D008AS3+TSTAT	S9V2D120U5VSB	16.0	12.0	8.5	17,400	215687079
5PX*D008AS3+TSTAT	S9V2D120U5PSC	16.0	12.0	8.5	17,400	215687083
5TXCD008AS3+TSTAT	S9V2D120U5PSC	16.0	12.0	8.5	17,400	215687187
5PX*C007AS3+TSTAT	S9V2C100U5VSB	16.0	12.0	8.5	17,500	215831671
5TXCC007AS3+TSTAT	S9V2C100U5VSB	16.0	12.0	8.5	17,600	215831683
5TEMCD04AV31+TDR+TSTAT	-	16.0	12.0	8.5	17,200	215863975
5TEMCD05AV41+TDR+TSTAT	-	16.0	12.0	8.5	17,200	215863976
5TXCC007AS3+TSTAT	S9X2C080U5PSB	16.0	12.0	8.1	17,100	214182598
5TXCC007AS3+TSTAT	S9X1C080U5PSB	16.0	12.0	8.1	17,100	214182602
5TXCC007AS3+TSTAT	S9V2C100U5PSC	16.0	12.0	8.1	17,100	214182604
5TXCC007AS3+TSTAT	S9V2C100U4VSB	16.0	12.0	8.1	17,600	214182608
5TXCC007AS3+TSTAT	S9V2C100U4VSA	16.0	12.0	8.1	17,100	214182610
5TXCC007AS3+TSTAT	S9V2C080U5PSC	16.0	12.0	8.1	17,200	214182612
5TXCC007AS3+TSTAT	*UHMC100CCV4	16.0	12.0	8.1	17,100	214182629
5TXCC007AS3+TSTAT	L8V1C100U5VSB	16.0	12.0	8.1	17,100	214182631
5TXCC007AS3+TSTAT+P0V0C000M50SD	-	16.0	12.0	8.1	17,000	214182637
5TXCC007AS3+TSTAT	S8V2C100M5PCB	16.0	12.0	8.1	17,200	214182649
5TXCC007AS3+TSTAT	S8V2C100M5PDB	16.0	12.0	8.1	17,200	214182653
5TXCD010AS3+TSTAT	S9V2D120U5VSA	16.0	12.0	8.1	17,300	214182666
5TXCD010AS3+TSTAT	S9V2D120U5PSB	16.0	12.0	8.1	16,900	214182670
5TXCD010AS3+TSTAT	S8X2D120M5PTC	16.0	12.0	8.1	17,200	214182672
5TXCD010AS3+TSTAT	S8X2D120M5PSC	16.0	12.0	8.1	17,200	214182674
5TXCD010AS3+TSTAT	S8X1D120M5PTC	16.0	12.0	8.1	17,200	214182676
5TXCD010AS3+TSTAT	S8X1D120M5PSC	16.0	12.0	8.1	17,200	214182678
5TXCD010AS3+TSTAT	S8V2D120M5PDB	16.0	12.0	8.1	16,900	214182680
5TXCD010AS3+TSTAT	*UHMD120CCV5	16.0	12.0	8.1	17,000	214182686
5TXCD010AS3+TSTAT	*UHMD120ACV5	16.0	12.0	8.1	17,000	214182688
5TXCD010AS3+TSTAT	S8V2D120M5PCB	16.0	12.0	8.1	16,900	214182690
5TXCC007AS3+TSTAT	S8V2C080M5PCB	16.0	12.0	8.1	17,200	214182641
5TXCC007AS3+TSTAT	S8V2C080M5PDB	16.0	12.0	8.1	17,200	214182645
5TXCD008AS3+TSTAT	S8X1D120M5PTC	16.0	12.0	8.1	17,400	215687188
5TXCD008AS3+TSTAT	S8X1D120M5PSC	16.0	12.0	8.1	17,400	215687189
5TXCD008AS3+TSTAT	S8V2D120M5PCB	16.0	12.0	8.1	17,600	215687190
5TXCD008AS3+TSTAT	*UHMD120CCV5	16.0	12.0	8.1	17,300	215687192
5TXCD008AS3+TSTAT	S8V2D120M5PDB	16.0	12.0	8.1	17,600	215687194
5PX*B006AS3+TSTAT+P0V0B000M40SD	-	16.0	12.0	8.1	17,500	215686850
5PX*B006AS3+TSTAT	S8X1B060M4PSC	16.0	12.0	8.1	17,300	215686859
5PX*B006AS3+TSTAT	S8X1B060M4PTC	16.0	12.0	8.1	17,300	215686860
5PX*B006AS3+TSTAT	S8X2B060M4PSC	16.0	12.0	8.1	17,300	215686865
5PX*B006AS3+TSTAT	*UHMB080CCV3	16.0	12.0	8.1	17,300	215686867
5PX*B006AS3+TSTAT	S8X2B060M4PTC	16.0	12.0	8.1	17,300	215686872
5PX*BD06AS3+TSTAT+P0V0B000M40SD	-	16.0	12.0	8.1	17,700	215686934

Yearly running cost in 10 large cities$960-$2,380

Phoenix, AZ$1,157/yr
Miami, FL$960/yr
Houston, TX$1,036/yr
Atlanta, GA$1,014/yr
Los Angeles, CA$979/yr
New York, NY$2,380/yr
Chicago, IL$1,924/yr
Denver, CO$1,593/yr
Seattle, WA$973/yr
Minneapolis, MN$1,968/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 5TWX5036A1?: The Trane 5TWX5036A1 is rated at up to 16.5 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 444 certified matchups SEER2 ranges from 15.2-16.5.
Is the Trane 5TWX5036A1 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 5TWX5036A1 cost to run per year?: At its rated efficiency it costs about $960-$2,380 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,157 in Phoenix and $1,968 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 5TWX5036A1?: ENERGY STAR lists 444 certified combinations for this outdoor unit. The highest-rated ones use 5TXCD010AS3+TSTAT, 5PX*D010AS3+TSTAT, 5PX*C009AS3+TSTAT+P0V0C000M50SD.
What refrigerant does the Trane 5TWX5036A1 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 $1,135/yrYou save $569/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 5TWX5036A1

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: $1,135
Current system, per year: $1,704
You save per year: $569
Payback: 22.0 years
Net after 10 years: -$6,813

Cooling $721Heating $414Electricity used: 7,093 kWhSaved vs. a minimum-efficiency heat pump: $166

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 ton models

Innovair SHV36H2BA · cold climate16.5 SEER2 · 8.2 HSPF2
Lennox ML14KP1-036-230A16.5 SEER2 · 8.1 HSPF2
Tempstar T5H8T36*K*AAA16.5 SEER2 · 8.5 HSPF2
Kenmore (C,H,T)5H8T36*K*AAA16.5 SEER2 · 8.5 HSPF2
Lennox XP21-036-230-16.4 SEER2 · 8.0 HSPF2
Heil H5H8T36*K*AAA16.5 SEER2 · 8.5 HSPF2
1HVAC ACIQ-36-HPC · cold climate16.3 SEER2 · 9.5 HSPF2
Heil D5CUHAH36AAK+TIC2025-0016 · cold climate16.5 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 3, 2026. How we use the data.