What is the SEER2 rating of the Mitsutomo RO-SZ30-AB-Q?

The Mitsutomo RO-SZ30-AB-Q is rated at up to 21.0 SEER2 and 11.0 EER2 for cooling and up to 9.1 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 3 certified matchups SEER2 ranges from 17.5-21.0.

Is the Mitsutomo RO-SZ30-AB-Q 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 30,000 BTU model.

How much does the Mitsutomo RO-SZ30-AB-Q cost to run per year?

At its rated efficiency it costs about $675-$2,027 a year in electricity in large U.S. cities, depending on climate and local rates - for example $863 in Phoenix and $1,718 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 Mitsutomo RO-SZ30-AB-Q?

ENERGY STAR lists 3 certified combinations for this outdoor unit. The highest-rated ones use RW-SZ30-AB-Q, RW-SZ30-AC-Q, HV-UZ30-AB-Q.

What refrigerant does the Mitsutomo RO-SZ30-AB-Q 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.

30,000 BTU mini-split heat pump · RO Series

Mitsutomo RO-SZ30-AB-Q

Below average cooling and heating efficiency for a 30,000 BTU mini-split heat pump, but not rated for cold climates.

Ranks #99 of 171 30,000 BTU mini-splits for cooling efficiency, and costs about $826 a year to run in a mixed climate like Atlanta.

SEER2: 21.0 Cooling efficiency over a season
Below average · beats 30%
HSPF2: 9.1 Heating efficiency over a season
Below average · beats 13%
EER2: 11.0 Cooling efficiency on a 95°F day
Below average · beats 9%
Heat at 5°F: 20,000 BTU/h60% of its 47°F output
Below average · beats 20%

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.
Cooling cost matters most - its SEER2 is below average for mini-splits.
You mainly need heat - its HSPF2 is below average for mini-splits.
You want the newest refrigerant - it uses R-410A, which is being phased down.

Calculate my running cost

Details

Specifications30,000 BTU, R-410A

General
Brand	Mitsutomo
Outdoor unit model	RO-SZ30-AB-Q
Series	RO Series
Type	Mini-split heat pump
Nominal size	30,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	May 20, 2024
Last certified	June 13, 2026
Cooling
SEER2Seasonal efficiency, higher is better	21.0 (range 17.5-21.0)
EER2Efficiency at 95°F outdoors	11.0-12.2
Cooling capacity	30,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.4-9.1
Capacity at 47°F	30,000 BTU/h
Capacity at 17°F	20,000-20,600 BTU/h
Capacity at 5°F	18,000-20,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.81-1.85
ENERGY STAR cold climate	No

Heating output as it gets colder60% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with RW-SZ30-AB-Q at the standard test temperatures, in BTU/h:

Certified matchups3 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.
RW-SZ30-AB-Q	21.0	11.0	9.1	18,000	211306390
RW-SZ30-AC-Q	21.0	12.2	8.7	20,000	213785762
HV-UZ30-AB-Q	17.5	11.2	8.4	19,000	214056584

Yearly running cost in 10 large cities$675-$2,027

Phoenix, AZ$863/yr
Miami, FL$675/yr
Houston, TX$775/yr
Atlanta, GA$826/yr
Los Angeles, CA$814/yr
New York, NY$2,027/yr
Chicago, IL$1,656/yr
Denver, CO$1,385/yr
Seattle, WA$857/yr
Minneapolis, MN$1,718/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 Mitsutomo RO-SZ30-AB-Q?: The Mitsutomo RO-SZ30-AB-Q is rated at up to 21.0 SEER2 and 11.0 EER2 for cooling and up to 9.1 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 3 certified matchups SEER2 ranges from 17.5-21.0.
Is the Mitsutomo RO-SZ30-AB-Q 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 30,000 BTU model.
How much does the Mitsutomo RO-SZ30-AB-Q cost to run per year?: At its rated efficiency it costs about $675-$2,027 a year in electricity in large U.S. cities, depending on climate and local rates - for example $863 in Phoenix and $1,718 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 Mitsutomo RO-SZ30-AB-Q?: ENERGY STAR lists 3 certified combinations for this outdoor unit. The highest-rated ones use RW-SZ30-AB-Q, RW-SZ30-AC-Q, HV-UZ30-AB-Q.
What refrigerant does the Mitsutomo RO-SZ30-AB-Q 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 $872/yrYou save $675/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 Mitsutomo RO-SZ30-AB-Q

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: $872
Current system, per year: $1,547
You save per year: $675
Payback: 17.0 years
Net after 10 years: -$4,752

Cooling $503Heating $369Electricity used: 5,451 kWhSaved vs. a minimum-efficiency heat pump: $314

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.

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Airquest DLCSRBH30AAK21.0 SEER2 · 9.0 HSPF2
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DIAL 36000Z-04-O · cold climate21.0 SEER2 · 9.0 HSPF2

See all 171 30,000 BTU mini-splits, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of June 13, 2026. How we use the data.