What is the SEER2 rating of the Trane 4TWV8X24A1?

The Trane 4TWV8X24A1 is rated at up to 18.0 SEER2 and 12.5 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 55 certified matchups SEER2 ranges from 17.0-18.0.

Is the Trane 4TWV8X24A1 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 2-ton model.

How much does the Trane 4TWV8X24A1 cost to run per year?

At its rated efficiency it costs about $620-$1,568 a year in electricity in large U.S. cities, depending on climate and local rates - for example $752 in Phoenix and $1,300 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the Trane 4TWV8X24A1 the same as the American Standard 4A6V8X24A1?

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 4TWV8X24A1?

ENERGY STAR lists 55 certified combinations for this outdoor unit. The highest-rated ones use TAMXB0B30V31, 4PX*BU36BS3, TEM8A0B30V31+TDR.

What refrigerant does the Trane 4TWV8X24A1 use?

It uses R-410A. R-410A is being phased down under the EPA AIM Act, and new systems are moving to R-454B and R-32.

2-ton central heat pump · XV18I

Trane 4TWV8X24A1

Average cooling efficiency and below average heating efficiency for a 2-ton central heat pump, but not rated for cold climates.

Ranks #181 of 331 2 ton central heat pumps for cooling efficiency, and costs about $665 a year to run in a mixed climate like Atlanta.

SEER2: 18.0 Cooling efficiency over a season
Average · beats 66%
HSPF2: 8.5 Heating efficiency over a season
Below average · beats 38%
EER2: 12.5 Cooling efficiency on a 95°F day
Very good · beats 80%
Heat at 5°F: 13,400 BTU/h63% of its 47°F output
Below average · beats 27%

A good fit if…

You want steady temperatures and quiet running - the compressor varies its speed.
You want a choice of indoor units - 55 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.
You want the newest refrigerant - it uses R-410A, which is being phased down.

Calculate my running cost

Details

Specifications2 ton, R-410A

General
Brand	Trane
Also sold as	American Standard
Outdoor unit model	4TWV8X24A1
Series	XV18I
Type	Central heat pump
Nominal size	2 ton
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	January 1, 2023
Last certified	July 9, 2025
Cooling
SEER2Seasonal efficiency, higher is better	18.0 (range 17.0-18.0)
EER2Efficiency at 95°F outdoors	11.7-12.5
Cooling capacity	22,200-24,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.0-8.5
Capacity at 47°F	18,100-22,400 BTU/h
Capacity at 17°F	16,300-17,900 BTU/h
Capacity at 5°F	12,400-13,400 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.60-1.95
ENERGY STAR cold climate	No

Heating output as it gets colder63% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with TAMXB0B30V31 at the standard test temperatures, in BTU/h:

Certified matchups55 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.
TAMXB0B30V31	-	18.0	12.5	8.5	12,900	211015538
4PX*BU36BS3	S9V2B040U3PSB+RP	18.0	12.5	8.5	13,100	207526392
TEM8A0B30V31+TDR	-	18.0	12.2	8.5	13,100	207526351
4PX*BU36BS3	*UHMB080ACV3	18.0	12.5	8.5	12,800	207526234
TEM8A0B24V21+TDR	-	18.0	12.5	8.5	13,200	211596920
4TXCB004DS3	*UHMB080ACV3	18.0	12.5	8.5	12,800	211596919
4TXCB004DS3	*UHMB060CCV3	18.0	12.5	8.5	12,700	213825958
4PX*BU36BS3	*UHMB060CCV3	18.0	12.5	8.5	12,700	214250713
4PX*BU36BS3	*UHMB080CCV3	18.0	12.5	8.5	12,800	214250715
4TXCB004DS3	*UHMB080CCV3	18.0	12.5	8.5	12,800	214250721
4PX*BU36BS3	S9V2B040U3VSB+RP	18.0	12.5	8.5	13,100	214638875
4PX*BU36BS3	S9V2B060U3VSB+RP	18.0	12.5	8.5	13,000	214638877
4TXCB004DS3	S9V2B040U3VSB+RP	18.0	12.5	8.5	13,100	214638881
4PX*BU36BS3	S9V2B080U4PSC+RP	18.0	12.5	8.5	12,800	214639931
4PX*BU36BS3	S9V2B060U4PSC+RP	18.0	12.5	8.5	12,800	214639933
4TXCB004DS3	S9V2B040U3PSC+RP	18.0	12.5	8.5	12,700	214639943
4TXCB004DS3	S9V2B060U4PSC+RP	18.0	12.5	8.5	12,900	214639945
4TXCB004DS3	S9V2B060U4VSB+RP	18.0	12.5	8.5	12,900	215825861
4PX*BU36BS3	L8V1A060U3VSA+RP	18.0	12.0	8.2	12,500	210653580
4TXCB003DS3	*UHMB080ACV3	18.0	12.0	8.2	13,100	210653586
4TXCB003DS3	S9V2B040U3PSB+RP	18.0	12.0	8.2	13,400	210653590
4TXCB003DS3	S9V2B040U3VSA+RP	18.0	12.0	8.2	13,400	210653591
4TXCB003DS3	*UHMB060ACV3	18.0	12.5	8.2	13,100	211596918
4TXCB004DS3	L8V1A060U3VSB+RP	18.0	12.0	8.2	12,500	212629931
4PX*BU36BS3	L8V1A060U3VSB+RP	18.0	12.0	8.2	12,500	212629917
4PX*BU36BS3	S9V2B060U4PSB+RP	18.0	12.5	8.2	12,800	213880911
4TXCB003DS3	*UHMB060CCV3	18.0	12.5	8.2	13,000	214250717
4TXCB003DS3	*UHMB080CCV3	18.0	12.5	8.2	13,100	214250719
4TXCB003DS3	S9V2B040U3VSB+RP	18.0	12.5	8.2	13,300	214638879
4TXCB004DS3	S9V2B060U3VSB+RP	18.0	12.5	8.2	13,000	214638883
4PX*BU30BS3	S9V2B080U4PSC+RP	18.0	12.5	8.2	13,100	214639923
4PX*BU30BS3	S9V2B040U3PSC+RP	18.0	12.5	8.2	12,900	214639927
4PX*BU30BS3	S9V2B060U4PSC+RP	18.0	12.5	8.2	13,200	214639929
4TXCB003DS3	S9V2B060U4PSC+RP	18.0	12.5	8.2	13,200	214639939
4TXCB003DS3	S9V2B040U3PSC+RP	18.0	12.5	8.2	12,900	214639937
4PX*BU30BS3	S9V2B060U4VSB+RP	18.0	12.5	8.2	13,100	215825855
4TXCB003DS3	L8V1A060U3VSA+RP	18.0	12.0	8.0	12,900	210653588
4PX*BU36BS3	S8V2A040M3PDA	17.5	12.5	8.2	12,400	211092926
4PX*BU36BS3	S8V2A040M3PCA	17.5	12.5	8.2	12,400	211092898
4TXCB004DS3	L8V1A040U3VSA+RP	17.5	12.0	8.2	12,600	210653594
4TXCB004DS3	L8V1A040U3VSB+RP	17.5	12.0	8.2	12,600	212629929
4TXCB004DS3	S9V2B060D3PSC+RP	17.5	11.7	8.2	12,600	214639949
4TXCB004DS3	S8V2A040M3PDA	17.5	12.5	8.1	12,400	211092930
4TXCB004DS3	S8V2A040M3PCA	17.5	12.5	8.1	12,400	211092900
4PX*BU36BS3	L8V1A040U3VSB+RP	17.5	12.0	8.1	12,500	212629915
4PX*BU36BS3	S8V2A040M3PCB	17.5	12.5	8.1	12,400	214252121
4PX*BU36BS3	S8V2A040M3PDB	17.5	12.5	8.1	12,400	214252123
4TXCB004DS3	S8V2A040M3PDB	17.5	12.5	8.1	12,400	214252127
4TXCB004DS3	S8V2A040M3PCB	17.5	12.5	8.1	12,400	214252129
4TXCB003DS3	L8V1A040U3VSA+RP	17.5	12.0	8.0	12,900	210653584
4TXCB003DS3	S8V2A040M3PDA	17.5	12.0	8.0	12,800	211081225
4TXCB003DS3	S8V2A040M3PCA	17.5	12.0	8.0	12,800	210691861
4TXCB003DS3	*DD2B060ACV3	17.5	11.7	8.0	13,000	211597914
4TXCB003DS3	S8V2A040M3PDB	17.5	12.0	8.0	12,800	214253229
4TXCB004DS3	S9V2B040D3PSC+RP	17.0	11.7	8.2	12,500	214639951

Same unit, other model numbers1

These model numbers have exactly the same certified ratings and matchups as the Trane 4TWV8X24A1: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

American Standard 4A6V8X24A1

Yearly running cost in 10 large cities$620-$1,568

Phoenix, AZ$752/yr
Miami, FL$620/yr
Houston, TX$673/yr
Atlanta, GA$665/yr
Los Angeles, CA$643/yr
New York, NY$1,568/yr
Chicago, IL$1,269/yr
Denver, CO$1,052/yr
Seattle, WA$644/yr
Minneapolis, MN$1,300/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 4TWV8X24A1?: The Trane 4TWV8X24A1 is rated at up to 18.0 SEER2 and 12.5 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 55 certified matchups SEER2 ranges from 17.0-18.0.
Is the Trane 4TWV8X24A1 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 2-ton model.
How much does the Trane 4TWV8X24A1 cost to run per year?: At its rated efficiency it costs about $620-$1,568 a year in electricity in large U.S. cities, depending on climate and local rates - for example $752 in Phoenix and $1,300 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the Trane 4TWV8X24A1 the same as the American Standard 4A6V8X24A1?: 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 4TWV8X24A1?: ENERGY STAR lists 55 certified combinations for this outdoor unit. The highest-rated ones use TAMXB0B30V31, 4PX*BU36BS3, TEM8A0B30V31+TDR.
What refrigerant does the Trane 4TWV8X24A1 use?: It uses R-410A. R-410A is being phased down under the EPA AIM Act, and new systems are moving to R-454B and R-32.

Running cost and savings

Pre-filled with this model. Pick your city and what you heat with today; everything else is optional.

Heat pump $739/yrYou save $439/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 4TWV8X24A1

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: $739
Current system, per year: $1,178
You save per year: $439
Payback: 20.5 years
Net after 10 years: -$4,614

Cooling $465Heating $274Electricity used: 4,622 kWhSaved vs. a minimum-efficiency heat pump: $157

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 2 ton models

Luxaire XD536E2D11 · cold climate18.0 SEER2 · 8.5 HSPF2
York HH824E2S12 · cold climate18.0 SEER2 · 8.5 HSPF2
Luxaire XD524E2D11 · cold climate18.0 SEER2 · 8.5 HSPF2
York YD524E2D11 · cold climate18.0 SEER2 · 8.5 HSPF2
Bosch BOVA-36RXB-M15S · cold climate18.0 SEER2 · 8.5 HSPF2
York YD536E2D11 · cold climate18.0 SEER2 · 8.5 HSPF2
Blueridge BNG2Z30SCN18.0 SEER2 · 8.3 HSPF2
American Standard 4A6L9024A118.0 SEER2 · 8.7 HSPF2

See all 331 2 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of July 9, 2025. How we use the data.