What is the SEER2 rating of the Midea MOD-24HFN1AA?

The Midea MOD-24HFN1AA is rated at up to 22.0 SEER2 and 14.0 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 Midea MOD-24HFN1AA 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 24,000 BTU model.

How much does the Midea MOD-24HFN1AA cost to run per year?

At its rated efficiency it costs about $515-$1,539 a year in electricity in large U.S. cities, depending on climate and local rates - for example $657 in Phoenix and $1,303 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the Midea MOD-24HFN1AA the same as the MRCOOL O-ES-24-HP-C-230B?

Yes, as far as the certified ratings go. ENERGY STAR lists 5 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 Midea MOD-24HFN1AA?

ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses MIDEA MSEP-24HFN1AA.

What refrigerant does the Midea MOD-24HFN1AA 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.

24,000 BTU mini-split heat pump · MOD Series

Midea MOD-24HFN1AA

Average cooling and heating efficiency for a 24,000 BTU mini-split heat pump, but not rated for cold climates.

Ranks #197 of 430 24,000 BTU mini-splits for cooling efficiency, and costs about $628 a year to run in a mixed climate like Atlanta.

SEER2: 22.0 Cooling efficiency over a season
Average · beats 48%
HSPF2: 10.0 Heating efficiency over a season
Average · beats 43%
EER2: 14.0 Cooling efficiency on a 95°F day
Very good · beats 82%
Heat at 5°F: 15,500 BTU/h62% of its 47°F output
Below average · beats 9%

A good fit if…

You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

You often see nights below 0°F - it is not cold-climate certified.
You want the newest refrigerant - it uses R-410A, which is being phased down.

Calculate my running cost

Details

Specifications24,000 BTU, R-410A

General
Brand	Midea
Also sold as	MRCOOL, MDV, NOVAIR, TGM
Outdoor unit model	MOD-24HFN1AA
Series	MOD Series
Type	Mini-split heat pump
Nominal size	24,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	September 5, 2024
Last certified	April 17, 2026
Cooling
SEER2Seasonal efficiency, higher is better	22.0 (range 22.0)
EER2Efficiency at 95°F outdoors	14.0
Cooling capacity	24,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	10.0
Capacity at 47°F	25,000 BTU/h
Capacity at 17°F	16,200 BTU/h
Capacity at 5°F	15,500 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.80
ENERGY STAR cold climate	No

Heating output as it gets colder62% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with MSEP-24HFN1AA 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.
MSEP-24HFN1AA MIDEA	22.0	14.0	10.0	15,500	213785813

Same unit, other model numbers4

These model numbers have exactly the same certified ratings and matchups as the Midea MOD-24HFN1AA: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

MRCOOL O-ES-24-HP-C-230B
MDV MVD-24HFN1AA
NOVAIR LEA24SZ25SK-O
TGM MRAPT24AS

Yearly running cost in 10 large cities$515-$1,539

Phoenix, AZ$657/yr
Miami, FL$515/yr
Houston, TX$590/yr
Atlanta, GA$628/yr
Los Angeles, CA$618/yr
New York, NY$1,539/yr
Chicago, IL$1,257/yr
Denver, CO$1,051/yr
Seattle, WA$650/yr
Minneapolis, MN$1,303/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 Midea MOD-24HFN1AA?: The Midea MOD-24HFN1AA is rated at up to 22.0 SEER2 and 14.0 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 Midea MOD-24HFN1AA 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 24,000 BTU model.
How much does the Midea MOD-24HFN1AA cost to run per year?: At its rated efficiency it costs about $515-$1,539 a year in electricity in large U.S. cities, depending on climate and local rates - for example $657 in Phoenix and $1,303 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the Midea MOD-24HFN1AA the same as the MRCOOL O-ES-24-HP-C-230B?: Yes, as far as the certified ratings go. ENERGY STAR lists 5 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 Midea MOD-24HFN1AA?: ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses MIDEA MSEP-24HFN1AA.
What refrigerant does the Midea MOD-24HFN1AA 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 $664/yrYou save $590/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 Midea MOD-24HFN1AA

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: $664
Current system, per year: $1,254
You save per year: $590
Payback: 15.3 years
Net after 10 years: -$3,101

Cooling $384Heating $280Electricity used: 4,150 kWhSaved vs. a minimum-efficiency heat pump: $300

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 24,000 BTU models

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TCL TMH27HDI2NAO0U25 · cold climate22.0 SEER2 · 10.0 HSPF2
Deye DW3B1-ACDC-24KR2(US) · cold climate22.0 SEER2 · 10.0 HSPF2
LG KUSAP241A · cold climate22.0 SEER2 · 9.7 HSPF2
AUX ASW-H24F8A2/*R3DI-C7 · cold climate22.0 SEER2 · 10.0 HSPF2
Koolking M3OF-27HFN1-M · cold climate22.0 SEER2 · 9.6 HSPF2
AUX AFEB24HP230V1CO · cold climate22.0 SEER2 · 10.0 HSPF2

See all 430 24,000 BTU mini-splits, ranked

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