What is the SEER2 rating of the Midea M5CVRAQ24AA3?

The Midea M5CVRAQ24AA3 is rated at up to 17.0 SEER2 and 9.0 EER2 for cooling and up to 8.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.

Is the Midea M5CVRAQ24AA3 good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 17,100 BTU/h at 5°F with a COP of 2.01, so it is still 2.0 times as efficient as electric resistance heat at that temperature.

How much does the Midea M5CVRAQ24AA3 cost to run per year?

At its rated efficiency it costs about $664-$1,782 a year in electricity in large U.S. cities, depending on climate and local rates - for example $819 in Phoenix and $1,489 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the Midea M5CVRAQ24AA3 the same as the Mainline ML24HP230WIN-O?

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 Midea M5CVRAQ24AA3?

ENERGY STAR lists 2 certified combinations for this outdoor unit. The highest-rated ones use MIDEA M5FVHAQ24XA3, MIDEA M5FVHAQ24XC3.

24,000 BTU mini-split heat pump · M5F Series

Midea M5CVRAQ24AA3

Below average cooling and heating efficiency for a 24,000 BTU mini-split heat pump, and certified for cold climates.

Ranks #421 of 430 24,000 BTU mini-splits for cooling efficiency, and costs about $745 a year to run in a mixed climate like Atlanta.

SEER2: 17.0 Cooling efficiency over a season
Below average · beats 2%
HSPF2: 8.5 Heating efficiency over a season
Below average · beats 2%
EER2: 9.0 Cooling efficiency on a 95°F day
Below average · beats 1%
Heat at 5°F: 17,100 BTU/h71% of its 47°F output
Average · beats 58%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 17,100 BTU/h at 5°F.
You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

Cooling cost matters most - its SEER2 is below average for mini-splits.
You mainly need heat - its HSPF2 is below average for mini-splits.

Calculate my running cost

Details

Specifications24,000 BTU, R-454B

General
Brand	Midea
Also sold as	Mainline, Comfort-Aire
Outdoor unit model	M5CVRAQ24AA3
Series	M5F Series
Type	Mini-split heat pump
Nominal size	24,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	November 15, 2018
Last certified	March 4, 2025
Cooling
SEER2Seasonal efficiency, higher is better	17.0 (range 17.0)
EER2Efficiency at 95°F outdoors	9.0
Cooling capacity	24,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.5
Capacity at 47°F	24,000 BTU/h
Capacity at 17°F	17,100 BTU/h
Capacity at 5°F	17,100 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.01
ENERGY STAR cold climate	Yes

Heating output as it gets colder71% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with M5FVHAQ24XA3 at the standard test temperatures, in BTU/h:

Certified matchups2 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.
M5FVHAQ24XA3 MIDEA · cold climate	17.0	9.0	8.5	17,100	215324983
M5FVHAQ24XC3 MIDEA · cold climate	17.0	9.0	8.5	17,100	215333844

Same unit, other model numbers2

These model numbers have exactly the same certified ratings and matchups as the Midea M5CVRAQ24AA3: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

Mainline ML24HP230WIN-O
Comfort-Aire A-SSP24SA-1

Yearly running cost in 10 large cities$664-$1,782

Phoenix, AZ$819/yr
Miami, FL$664/yr
Houston, TX$734/yr
Atlanta, GA$745/yr
Los Angeles, CA$725/yr
New York, NY$1,782/yr
Chicago, IL$1,447/yr
Denver, CO$1,203/yr
Seattle, WA$740/yr
Minneapolis, MN$1,489/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 M5CVRAQ24AA3?: The Midea M5CVRAQ24AA3 is rated at up to 17.0 SEER2 and 9.0 EER2 for cooling and up to 8.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
Is the Midea M5CVRAQ24AA3 good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 17,100 BTU/h at 5°F with a COP of 2.01, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
How much does the Midea M5CVRAQ24AA3 cost to run per year?: At its rated efficiency it costs about $664-$1,782 a year in electricity in large U.S. cities, depending on climate and local rates - for example $819 in Phoenix and $1,489 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the Midea M5CVRAQ24AA3 the same as the Mainline ML24HP230WIN-O?: 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 Midea M5CVRAQ24AA3?: ENERGY STAR lists 2 certified combinations for this outdoor unit. The highest-rated ones use MIDEA M5FVHAQ24XA3, MIDEA M5FVHAQ24XC3.
What refrigerant does the Midea M5CVRAQ24AA3 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 $813/yrYou save $424/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 M5CVRAQ24AA3

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: $813
Current system, per year: $1,238
You save per year: $424
Payback: 21.2 years
Net after 10 years: -$4,757

Cooling $497Heating $316Electricity used: 5,082 kWhSaved vs. a minimum-efficiency heat pump: $136

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

Carrier 37MVRAQ24AA3 · cold climate17.0 SEER2 · 8.5 HSPF2
Arcoaire D5CVRAH24AAK · cold climate17.0 SEER2 · 8.5 HSPF2
TOSOT TGWHD-24ND · cold climate17.0 SEER2 · 8.5 HSPF2
Mitsubishi Electric SUZ-KA30NAHZ · cold climate17.8 SEER2 · 8.6 HSPF2
Mitsubishi Electric PUZ-HA24NHA · cold climate16.7 SEER2 · 9.4 HSPF2
Mitsubishi Electric SUZ-KA24NA217.9 SEER2 · 8.3 HSPF2
Mitsubishi Electric SUZ-KA24NAHZ · cold climate16.7 SEER2 · 9.4 HSPF2
LG KUSAF241F18.0 SEER2 · 8.0 HSPF2

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

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of March 4, 2025. How we use the data.