What is the SEER2 rating of the Hisense AUW-12U3TS1?

The Hisense AUW-12U3TS1 is rated at up to 22.0 SEER2 and 12.0 EER2 for cooling and up to 10.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 5 certified matchups SEER2 ranges from 19.5-22.0.

Is the Hisense AUW-12U3TS1 good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 12,000 BTU/h at 5°F with a COP of 1.80, so it is still 1.8 times as efficient as electric resistance heat at that temperature.

How much does the Hisense AUW-12U3TS1 cost to run per year?

At its rated efficiency it costs about $257-$715 a year in electricity in large U.S. cities, depending on climate and local rates - for example $320 in Phoenix and $600 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the Hisense AUW-12U3TS1 the same as the Hisense AOU-12U3T25U?

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 Hisense AUW-12U3TS1?

ENERGY STAR lists 5 certified combinations for this outdoor unit. The highest-rated ones use HISENSE AST-12UW3TXEDN00A, HISENSE AST-12UW3TXU**00, HISENSE AST-12UW3TXG**00.

12,000 BTU mini-split heat pump · HiULTRA

Hisense AUW-12U3TS1

Average cooling and heating efficiency for a 12,000 BTU mini-split heat pump, and certified for cold climates.

Ranks #291 of 394 12,000 BTU mini-splits for cooling efficiency, and costs about $296 a year to run in a mixed climate like Atlanta.

SEER2: 22.0 Cooling efficiency over a season
Average · beats 48%
HSPF2: 10.5 Heating efficiency over a season
Average · beats 61%
EER2: 12.0 Cooling efficiency on a 95°F day
Below average · beats 25%
Heat at 5°F: 12,000 BTU/h100% of its 47°F output
Below average · beats 9%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 12,000 BTU/h at 5°F.
You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

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

Calculate my running cost

Details

Specifications12,000 BTU, R-454B

General
Brand	Hisense
Outdoor unit model	AUW-12U3TS1
Series	HiULTRA
Type	Mini-split heat pump
Nominal size	12,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	August 23, 2024
Last certified	April 17, 2026
Cooling
SEER2Seasonal efficiency, higher is better	22.0 (range 19.5-22.0)
EER2Efficiency at 95°F outdoors	11.2-12.0
Cooling capacity	12,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	9.5-10.5
Capacity at 47°F	12,000 BTU/h
Capacity at 17°F	8,700-8,900 BTU/h
Capacity at 5°F	12,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.80
ENERGY STAR cold climate	Yes

Heating output as it gets colder100% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with AST-12UW3TXEDN00A at the standard test temperatures, in BTU/h:

Certified matchups5 indoor units

The same outdoor unit scores differently with each indoor unit. Ask your installer for the AHRI reference number of the exact system you are quoted.

Indoor unit	SEER2	EER2	HSPF2	Heat @5°F	AHRI ref.
AST-12UW3TXEDN00A HISENSE · cold climate	22.0	12.0	10.5	12,000	215439625
AST-12UW3TXU**00 HISENSE · cold climate	22.0	11.7	9.5	12,000	217231610
AST-12UW3TXG**00 HISENSE · cold climate	21.0	11.2	10.0	12,000	217231618
ACT-12UR3TCA1 HISENSE · cold climate	20.0	12.0	9.5	12,000	215449565
ADT-12UX3TBL1 HISENSE · cold climate	19.5	11.7	9.5	12,000	215449561

Same unit, other model numbers1

These model numbers have exactly the same certified ratings and matchups as the Hisense AUW-12U3TS1: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

Hisense AOU-12U3T25U

Yearly running cost in 10 large cities$257-$715

Phoenix, AZ$320/yr
Miami, FL$257/yr
Houston, TX$287/yr
Atlanta, GA$296/yr
Los Angeles, CA$290/yr
New York, NY$715/yr
Chicago, IL$582/yr
Denver, CO$485/yr
Seattle, WA$299/yr
Minneapolis, MN$600/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 Hisense AUW-12U3TS1?: The Hisense AUW-12U3TS1 is rated at up to 22.0 SEER2 and 12.0 EER2 for cooling and up to 10.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 5 certified matchups SEER2 ranges from 19.5-22.0.
Is the Hisense AUW-12U3TS1 good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 12,000 BTU/h at 5°F with a COP of 1.80, so it is still 1.8 times as efficient as electric resistance heat at that temperature.
How much does the Hisense AUW-12U3TS1 cost to run per year?: At its rated efficiency it costs about $257-$715 a year in electricity in large U.S. cities, depending on climate and local rates - for example $320 in Phoenix and $600 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the Hisense AUW-12U3TS1 the same as the Hisense AOU-12U3T25U?: 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 Hisense AUW-12U3TS1?: ENERGY STAR lists 5 certified combinations for this outdoor unit. The highest-rated ones use HISENSE AST-12UW3TXEDN00A, HISENSE AST-12UW3TXU**00, HISENSE AST-12UW3TXG**00.
What refrigerant does the Hisense AUW-12U3TS1 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 $320/yrYou save $299/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 Hisense AUW-12U3TS1

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: $320
Current system, per year: $619
You save per year: $299
Payback: 15.1 years
Net after 10 years: -$1,513

Cooling $192Heating $128Electricity used: 2,000 kWhSaved vs. a minimum-efficiency heat pump: $155

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 12,000 BTU models

Guardian UPC12CN23STG1 · cold climate22.0 SEER2 · 10.5 HSPF2
Innovair QOS12H2BH0A · cold climate22.0 SEER2 · 10.5 HSPF2
Mitsubishi Electric SUZ-KA12NAH22.0 SEER2 · 10.7 HSPF2
Mitsubishi Electric NTXSKS12A112A22.0 SEER2 · 10.5 HSPF2
Mitsubishi Electric SUZ-KA12NA222.0 SEER2 · 10.9 HSPF2
Lennox MMLD012S6S-1P · cold climate22.0 SEER2 · 10.4 HSPF2
Sharp AE-X12ZU1 · cold climate22.0 SEER2 · 11.0 HSPF2
Star Air Kontrol SAK-12-OC/220V22.0 SEER2 · 9.8 HSPF2

See all 394 12,000 BTU mini-splits, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of April 17, 2026. How we use the data.