What is the SEER2 rating of the AI AIR CONDITIONING AO24-09N2-M1?

The AI AIR CONDITIONING AO24-09N2-M1 is rated at up to 26.0 SEER2 and 16.2 EER2 for cooling and up to 13.9 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 6 certified matchups SEER2 ranges from 19.5-26.0.

Is the AI AIR CONDITIONING AO24-09N2-M1 good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 8,600 BTU/h at 5°F with a COP of 2.33, so it is still 2.3 times as efficient as electric resistance heat at that temperature.

How much does the AI AIR CONDITIONING AO24-09N2-M1 cost to run per year?

At its rated efficiency it costs about $163-$451 a year in electricity in large U.S. cities, depending on climate and local rates - for example $203 in Phoenix and $378 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the AI AIR CONDITIONING AO24-09N2-M1 the same as the Mitsutomo RU-SZ09-LA-Q?

Yes, as far as the certified ratings go. ENERGY STAR lists 3 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 AI AIR CONDITIONING AO24-09N2-M1?

ENERGY STAR lists 6 certified combinations for this outdoor unit. The highest-rated ones use AS-09N2-M1, AW25-09N2-M1, A1C-09N2-M1.

9,000 BTU mini-split heat pump · AO Series

AI AIR CONDITIONING AO24-09N2-M1

Excellent cooling and heating efficiency for a 9,000 BTU mini-split heat pump, and certified for cold climates.

Ranks #113 of 395 9,000 BTU mini-splits for cooling efficiency, and costs about $187 a year to run in a mixed climate like Atlanta.

SEER2: 26.0 Cooling efficiency over a season
Excellent · beats 91%
HSPF2: 13.9 Heating efficiency over a season
Excellent · beats 98%
EER2: 16.2 Cooling efficiency on a 95°F day
Excellent · beats 97%
Heat at 5°F: 8,600 BTU/h96% of its 47°F output
Very good · beats 88%

A good fit if…

You want low cooling bills - its SEER2 beats 91% of mini-splits.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 8,600 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 98% of mini-splits.
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

Specifications9,000 BTU, R-454B

General
Brand	AI AIR CONDITIONING
Also sold as	Mitsutomo, Wells
Outdoor unit model	AO24-09N2-M1
Series	AO Series
Type	Mini-split heat pump
Nominal size	9,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	October 10, 2024
Last certified	May 6, 2026
Cooling
SEER2Seasonal efficiency, higher is better	26.0 (range 19.5-26.0)
EER2Efficiency at 95°F outdoors	12.8-16.2
Cooling capacity	9,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	11.0-13.9
Capacity at 47°F	9,000-11,000 BTU/h
Capacity at 17°F	7,900-9,300 BTU/h
Capacity at 5°F	8,000-8,600 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.17-2.33
ENERGY STAR cold climate	Yes

Heating output as it gets colder96% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with AS-09N2-M1 at the standard test temperatures, in BTU/h:

Certified matchups6 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.
AS-09N2-M1 · cold climate	26.0	16.2	13.9	8,600	215866763
AW25-09N2-M1 · cold climate	24.6	14.7	13.0	8,200	215866730
A1C-09N2-M1 · cold climate	22.1	14.4	11.8	8,000	215866750
AC-09N2-M1 · cold climate	21.6	14.3	11.3	8,300	215866744
AH-09N2-M1 · cold climate	19.7	13.0	11.5	8,300	215866756
AL-09N2-M1 · cold climate	19.5	12.8	11.0	8,600	215866753

Same unit, other model numbers2

These model numbers have exactly the same certified ratings and matchups as the AI AIR CONDITIONING AO24-09N2-M1: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

Mitsutomo RU-SZ09-LA-Q
Wells WOS-09QUA/230

Yearly running cost in 10 large cities$163-$451

Phoenix, AZ$203/yr
Miami, FL$163/yr
Houston, TX$182/yr
Atlanta, GA$187/yr
Los Angeles, CA$183/yr
New York, NY$451/yr
Chicago, IL$367/yr
Denver, CO$305/yr
Seattle, WA$188/yr
Minneapolis, MN$378/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 AI AIR CONDITIONING AO24-09N2-M1?: The AI AIR CONDITIONING AO24-09N2-M1 is rated at up to 26.0 SEER2 and 16.2 EER2 for cooling and up to 13.9 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 6 certified matchups SEER2 ranges from 19.5-26.0.
Is the AI AIR CONDITIONING AO24-09N2-M1 good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 8,600 BTU/h at 5°F with a COP of 2.33, so it is still 2.3 times as efficient as electric resistance heat at that temperature.
How much does the AI AIR CONDITIONING AO24-09N2-M1 cost to run per year?: At its rated efficiency it costs about $163-$451 a year in electricity in large U.S. cities, depending on climate and local rates - for example $203 in Phoenix and $378 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the AI AIR CONDITIONING AO24-09N2-M1 the same as the Mitsutomo RU-SZ09-LA-Q?: Yes, as far as the certified ratings go. ENERGY STAR lists 3 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 AI AIR CONDITIONING AO24-09N2-M1?: ENERGY STAR lists 6 certified combinations for this outdoor unit. The highest-rated ones use AS-09N2-M1, AW25-09N2-M1, A1C-09N2-M1.
What refrigerant does the AI AIR CONDITIONING AO24-09N2-M1 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 $202/yrYou save $278/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 AI AIR CONDITIONING AO24-09N2-M1

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: $202
Current system, per year: $480
You save per year: $278
Payback: 12.6 years
Net after 10 years: -$720

Cooling $122Heating $81Electricity used: 1,265 kWhSaved vs. a minimum-efficiency heat pump: $168

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 9,000 BTU models

ACIQ ACIQ-09ZS-HP230C · cold climate26.0 SEER2 · 13.9 HSPF2
Arcoaire D5CSRAH09AAK · cold climate26.0 SEER2 · 13.9 HSPF2
AC Pro MHPC-H-009BSB · cold climate26.0 SEER2 · 13.9 HSPF2
Carrier 37MARAQ09AA3 · cold climate26.0 SEER2 · 13.9 HSPF2
MDV MOX330-09HFN1-MY6W · cold climate26.3 SEER2 · 11.4 HSPF2
Cooper&Hunter CH-RES09-230VO · cold climate26.0 SEER2 · 13.9 HSPF2
Goodman MSH093G22MCAA · cold climate26.4 SEER2 · 11.6 HSPF2
DIRECT AIR DIRM4-09DA25-1Z · cold climate26.0 SEER2 · 13.9 HSPF2

See all 395 9,000 BTU mini-splits, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of May 6, 2026. How we use the data.