What is the SEER2 rating of the KEEN Home KEENUMHP12AA?

The KEEN Home KEENUMHP12AA is rated at up to 23.0 SEER2 and 13.0 EER2 for cooling and up to 10.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.

Is the KEEN Home KEENUMHP12AA good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 11,500 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.

How much does the KEEN Home KEENUMHP12AA cost to run per year?

At its rated efficiency it costs about $247-$764 a year in electricity in large U.S. cities, depending on climate and local rates - for example $319 in Phoenix and $649 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 KEEN Home KEENUMHP12AA?

ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses KEENOWAH12AA.

12,000 BTU mini-split heat pump · KEEN Series

KEEN Home KEENUMHP12AA

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

Ranks #257 of 394 12,000 BTU mini-splits for cooling efficiency, and costs about $309 a year to run in a mixed climate like Atlanta.

SEER2: 23.0 Cooling efficiency over a season
Average · beats 62%
HSPF2: 10.0 Heating efficiency over a season
Average · beats 43%
EER2: 13.0 Cooling efficiency on a 95°F day
Average · beats 62%
Heat at 5°F: 11,500 BTU/h92% of its 47°F output
Average · beats 48%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 11,500 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	KEEN Home
Outdoor unit model	KEENUMHP12AA
Series	KEEN Series
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	July 4, 2025
Last certified	March 24, 2026
Cooling
SEER2Seasonal efficiency, higher is better	23.0 (range 23.0)
EER2Efficiency at 95°F outdoors	13.0
Cooling capacity	12,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	10.0
Capacity at 47°F	12,500 BTU/h
Capacity at 17°F	9,600 BTU/h
Capacity at 5°F	11,500 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.00
ENERGY STAR cold climate	Yes

Heating output as it gets colder92% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with KEENOWAH12AA at the standard test temperatures, in BTU/h:

Certified matchups1 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.
KEENOWAH12AA · cold climate	23.0	13.0	10.0	11,500	217596900

Yearly running cost in 10 large cities$247-$764

Phoenix, AZ$319/yr
Miami, FL$247/yr
Houston, TX$286/yr
Atlanta, GA$309/yr
Los Angeles, CA$306/yr
New York, NY$764/yr
Chicago, IL$625/yr
Denver, CO$523/yr
Seattle, WA$325/yr
Minneapolis, MN$649/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 KEEN Home KEENUMHP12AA?: The KEEN Home KEENUMHP12AA is rated at up to 23.0 SEER2 and 13.0 EER2 for cooling and up to 10.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
Is the KEEN Home KEENUMHP12AA good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 11,500 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
How much does the KEEN Home KEENUMHP12AA cost to run per year?: At its rated efficiency it costs about $247-$764 a year in electricity in large U.S. cities, depending on climate and local rates - for example $319 in Phoenix and $649 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 KEEN Home KEENUMHP12AA?: ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses KEENOWAH12AA.
What refrigerant does the KEEN Home KEENUMHP12AA 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 $324/yrYou save $303/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 KEEN Home KEENUMHP12AA

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: $324
Current system, per year: $627
You save per year: $303
Payback: 14.8 years
Net after 10 years: -$1,467

Cooling $184Heating $140Electricity used: 2,023 kWhSaved vs. a minimum-efficiency heat pump: $158

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

KANIONco KWSM-12IR454BHS23LR · cold climate23.0 SEER2 · 10.0 HSPF2
TCL H12SBH22BPC · cold climate23.0 SEER2 · 10.0 HSPF2
Hisense AST-1224TUO · cold climate23.0 SEER2 · 10.0 HSPF2
TCL TH12SVH23BWC · cold climate23.0 SEER2 · 9.8 HSPF2
Guardian URC12CN23STG1 · cold climate23.0 SEER2 · 10.0 HSPF2
Ameristar M3THS2212A91NA23.0 SEER2 · 9.5 HSPF2
Friedrich FPHSR12A3D · cold climate23.0 SEER2 · 10.0 HSPF2
GREE GWH12AUCXD-D6DNA1E/O · cold climate23.0 SEER2 · 9.5 HSPF2

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

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of March 24, 2026. How we use the data.