What is the SEER2 rating of the ECO AC EHH-O12BB?

The ECO AC EHH-O12BB is rated at up to 23.1 SEER2 and 12.5 EER2 for cooling and up to 10.3 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 3 certified matchups SEER2 ranges from 19.0-23.1.

Is the ECO AC EHH-O12BB good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 8,400 BTU/h at 5°F with a COP of 2.27, so it is still 2.3 times as efficient as electric resistance heat at that temperature.

How much does the ECO AC EHH-O12BB cost to run per year?

At its rated efficiency it costs about $245-$720 a year in electricity in large U.S. cities, depending on climate and local rates - for example $311 in Phoenix and $608 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 ECO AC EHH-O12BB?

ENERGY STAR lists 3 certified combinations for this outdoor unit. The highest-rated ones use EHH-W12BB, EHH-C12BA, EHH-D12BA.

What refrigerant does the ECO AC EHH-O12BB 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.

12,000 BTU mini-split heat pump · E-series

ECO AC EHH-O12BB

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

Ranks #238 of 394 12,000 BTU mini-splits for cooling efficiency, and costs about $295 a year to run in a mixed climate like Atlanta.

SEER2: 23.1 Cooling efficiency over a season
Average · beats 66%
HSPF2: 10.3 Heating efficiency over a season
Average · beats 55%
EER2: 12.5 Cooling efficiency on a 95°F day
Average · beats 44%
Heat at 5°F: 8,400 BTU/h68% of its 47°F output
Very good · beats 84%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 8,400 BTU/h at 5°F.
You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

You want the newest refrigerant - it uses R-410A, which is being phased down.

Calculate my running cost

Details

Specifications12,000 BTU, R-410A

General
Brand	ECO AC
Outdoor unit model	EHH-O12BB
Series	E-series
Type	Mini-split heat pump
Nominal size	12,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	October 15, 2022
Last certified	April 27, 2026
Cooling
SEER2Seasonal efficiency, higher is better	23.1 (range 19.0-23.1)
EER2Efficiency at 95°F outdoors	11.7-14.0
Cooling capacity	11,500-12,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	9.3-10.3
Capacity at 47°F	12,000 BTU/h
Capacity at 17°F	8,200-9,300 BTU/h
Capacity at 5°F	8,000-8,400 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.24-2.27
ENERGY STAR cold climate	Yes

Heating output as it gets colder68% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with EHH-W12BB at the standard test temperatures, in BTU/h:

Certified matchups3 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.
EHH-W12BB	23.1	12.5	9.3	8,100	207825491
EHH-C12BA	22.7	14.0	10.0	8,000	210586147
EHH-D12BA · cold climate	19.0	11.7	10.3	8,400	207825495

Yearly running cost in 10 large cities$245-$720

Phoenix, AZ$311/yr
Miami, FL$245/yr
Houston, TX$279/yr
Atlanta, GA$295/yr
Los Angeles, CA$290/yr
New York, NY$720/yr
Chicago, IL$587/yr
Denver, CO$491/yr
Seattle, WA$303/yr
Minneapolis, MN$608/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 ECO AC EHH-O12BB?: The ECO AC EHH-O12BB is rated at up to 23.1 SEER2 and 12.5 EER2 for cooling and up to 10.3 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 3 certified matchups SEER2 ranges from 19.0-23.1.
Is the ECO AC EHH-O12BB good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 8,400 BTU/h at 5°F with a COP of 2.27, so it is still 2.3 times as efficient as electric resistance heat at that temperature.
How much does the ECO AC EHH-O12BB cost to run per year?: At its rated efficiency it costs about $245-$720 a year in electricity in large U.S. cities, depending on climate and local rates - for example $311 in Phoenix and $608 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 ECO AC EHH-O12BB?: ENERGY STAR lists 3 certified combinations for this outdoor unit. The highest-rated ones use EHH-W12BB, EHH-C12BA, EHH-D12BA.
What refrigerant does the ECO AC EHH-O12BB 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 $313/yrYou save $305/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 ECO AC EHH-O12BB

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: $313
Current system, per year: $619
You save per year: $305
Payback: 14.7 years
Net after 10 years: -$1,446

Cooling $183Heating $130Electricity used: 1,958 kWhSaved vs. a minimum-efficiency heat pump: $161

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

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Goodman MSH123G22MCAA · cold climate23.1 SEER2 · 10.5 HSPF2
KANIONco KWSM-12IR410AHS22MV23.1 SEER2 · 9.3 HSPF2
ZERO ZMSB-12HV-USHH · cold climate23.1 SEER2 · 10.8 HSPF2
Star Air Kontrol SAK-12-22MS/22023.1 SEER2 · 9.3 HSPF2
SLIMAIR SHC12VE2AG · cold climate23.1 SEER2 · 10.8 HSPF2
Fujitsu AOUH12LUAS1 · cold climate23.0 SEER2 · 11.3 HSPF2

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

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of April 27, 2026. How we use the data.