What is the SEER2 rating of the Mitsubishi Electric MXZ-SM36NL-?

The Mitsubishi Electric MXZ-SM36NL- is rated at up to 23.0 SEER2 and 14.1 EER2 for cooling and up to 11.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 13 certified matchups SEER2 ranges from 17.5-23.0.

Is the Mitsubishi Electric MXZ-SM36NL- good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 29,000 BTU/h at 5°F with a COP of 2.20, so it is still 2.2 times as efficient as electric resistance heat at that temperature.

How much does the Mitsubishi Electric MXZ-SM36NL- cost to run per year?

At its rated efficiency it costs about $494-$1,551 a year in electricity in large U.S. cities, depending on climate and local rates - for example $641 in Phoenix and $1,320 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 Mitsubishi Electric MXZ-SM36NL-?

ENERGY STAR lists 13 certified combinations for this outdoor unit. The highest-rated ones use PKFY-M24NKMU, PKFY-L24NKMU, PEFY-L18NMAU.

24,000 BTU mini-split heat pump · Smart Multi

Mitsubishi Electric MXZ-SM36NL-

Average cooling efficiency and very good heating efficiency for a 24,000 BTU mini-split heat pump, and certified for cold climates.

Ranks #95 of 430 24,000 BTU mini-splits for cooling efficiency, and costs about $626 a year to run in a mixed climate like Atlanta.

SEER2: 23.0 Cooling efficiency over a season
Average · beats 62%
HSPF2: 11.0 Heating efficiency over a season
Very good · beats 75%
EER2: 14.1 Cooling efficiency on a 95°F day
Very good · beats 85%
Heat at 5°F: 29,000 BTU/h71% of its 47°F output
Very good · beats 78%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 29,000 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 75% of mini-splits.
You want steady temperatures and quiet running - the compressor varies its speed.
You want a choice of indoor units - 13 certified pairings.

Think twice if…

Nothing stands out - its ratings have no weak spot for its class.

Calculate my running cost

Details

Specifications24,000 BTU, R-454B

General
Brand	Mitsubishi Electric
Outdoor unit model	MXZ-SM36NL-
Series	Smart Multi
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	January 27, 2026
Last certified	April 17, 2026
Cooling
SEER2Seasonal efficiency, higher is better	23.0 (range 17.5-23.0)
EER2Efficiency at 95°F outdoors	11.0-14.1
Cooling capacity	18,000-36,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.5-11.0
Capacity at 47°F	22,000-41,000 BTU/h
Capacity at 17°F	13,500-26,600 BTU/h
Capacity at 5°F	18,000-29,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.76-2.20
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 best matchup at the standard test temperatures, in BTU/h:

Certified matchups13 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.
- · cold climate	23.0	14.1	11.0	29,000	217177363
- · cold climate	21.3	12.6	10.5	29,000	217177369
PKFY-M24NKMU · cold climate	21.1	11.0	9.2	26,000	218083348
PKFY-L24NKMU · cold climate	21.1	11.0	9.2	26,000	218186680
PEFY-L18NMAU · cold climate	20.1	11.0	8.8	22,000	218186675
PEFY-M18NMAU · cold climate	20.1	11.0	8.8	22,000	218186695
PEFY-L24NMAU · cold climate	19.6	11.0	9.1	28,000	218186676
PEFY-M24NMAU · cold climate	19.6	11.0	9.1	28,000	218186696
- · cold climate	19.5	11.0	10.0	29,000	217135876
PEFY-L36NMAU · cold climate	19.5	11.0	10.0	29,000	218186677
PEFY-M36NMAU · cold climate	19.5	11.0	10.0	29,000	218186697
PKFY-M18NLMU · cold climate	17.5	11.0	8.5	18,000	218083347
PKFY-L18NLMU · cold climate	17.5	11.0	8.5	18,000	218186679

Yearly running cost in 10 large cities$494-$1,551

Phoenix, AZ$641/yr
Miami, FL$494/yr
Houston, TX$576/yr
Atlanta, GA$626/yr
Los Angeles, CA$619/yr
New York, NY$1,551/yr
Chicago, IL$1,270/yr
Denver, CO$1,064/yr
Seattle, WA$660/yr
Minneapolis, MN$1,320/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 Mitsubishi Electric MXZ-SM36NL-?: The Mitsubishi Electric MXZ-SM36NL- is rated at up to 23.0 SEER2 and 14.1 EER2 for cooling and up to 11.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 13 certified matchups SEER2 ranges from 17.5-23.0.
Is the Mitsubishi Electric MXZ-SM36NL- good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 29,000 BTU/h at 5°F with a COP of 2.20, so it is still 2.2 times as efficient as electric resistance heat at that temperature.
How much does the Mitsubishi Electric MXZ-SM36NL- cost to run per year?: At its rated efficiency it costs about $494-$1,551 a year in electricity in large U.S. cities, depending on climate and local rates - for example $641 in Phoenix and $1,320 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 Mitsubishi Electric MXZ-SM36NL-?: ENERGY STAR lists 13 certified combinations for this outdoor unit. The highest-rated ones use PKFY-M24NKMU, PKFY-L24NKMU, PEFY-L18NMAU.
What refrigerant does the Mitsubishi Electric MXZ-SM36NL- 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 $652/yrYou save $651/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 Mitsubishi Electric MXZ-SM36NL-

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: $652
Current system, per year: $1,303
You save per year: $651
Payback: 13.8 years
Net after 10 years: -$2,494

Cooling $367Heating $285Electricity used: 4,077 kWhSaved vs. a minimum-efficiency heat pump: $357

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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Midea MOD30-24HFN10-M1P · cold climate23.0 SEER2 · 11.7 HSPF2
Fujitsu AOUH24KWAS3 · cold climate23.0 SEER2 · 10.5 HSPF2
Midea MOD-24HFN10AE · cold climate23.0 SEER2 · 11.7 HSPF2
GE Appliances 3G24ED2BE · cold climate23.0 SEER2 · 10.5 HSPF2
Midea MO1ES-H24B-2A · cold climate23.0 SEER2 · 11.7 HSPF2
DELLA 048-TP-23K2V-23S-OUT · cold climate23.0 SEER2 · 10.4 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.