What is the SEER2 rating of the DUCTLESSAIRE DA0921-H2-O?

The DUCTLESSAIRE DA0921-H2-O is rated at up to 24.0 SEER2 and 14.0 EER2 for cooling and up to 11.4 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.

Is the DUCTLESSAIRE DA0921-H2-O good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 7,800 BTU/h at 5°F with a COP of 2.18, so it is still 2.2 times as efficient as electric resistance heat at that temperature.

How much does the DUCTLESSAIRE DA0921-H2-O cost to run per year?

At its rated efficiency it costs about $177-$538 a year in electricity in large U.S. cities, depending on climate and local rates - for example $227 in Phoenix and $457 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 DUCTLESSAIRE DA0921-H2-O?

ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses DA0921-H2-I.

What refrigerant does the DUCTLESSAIRE DA0921-H2-O 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.

9,000 BTU mini-split heat pump · DA series

DUCTLESSAIRE DA0921-H2-O

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

Ranks #203 of 395 9,000 BTU mini-splits for cooling efficiency, and costs about $219 a year to run in a mixed climate like Atlanta.

SEER2: 24.0 Cooling efficiency over a season
Very good · beats 75%
HSPF2: 11.4 Heating efficiency over a season
Very good · beats 82%
EER2: 14.0 Cooling efficiency on a 95°F day
Very good · beats 82%
Heat at 5°F: 7,800 BTU/h78% of its 47°F output
Very good · beats 76%

A good fit if…

You want low cooling bills - its SEER2 beats 75% of mini-splits.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 7,800 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 82% of mini-splits.
You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

You want the newest refrigerant - it uses R-410A, which is being phased down.

Calculate my running cost

Details

Specifications9,000 BTU, R-410A

General
Brand	DUCTLESSAIRE
Outdoor unit model	DA0921-H2-O
Series	DA series
Type	Mini-split heat pump
Nominal size	9,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	September 1, 2020
Last certified	April 17, 2026
Cooling
SEER2Seasonal efficiency, higher is better	24.0 (range 24.0)
EER2Efficiency at 95°F outdoors	14.0
Cooling capacity	9,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	11.4
Capacity at 47°F	10,000 BTU/h
Capacity at 17°F	8,300 BTU/h
Capacity at 5°F	7,800 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.18
ENERGY STAR cold climate	Yes

Heating output as it gets colder78% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with DA0921-H2-I 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.
DA0921-H2-I · cold climate	24.0	14.0	11.4	7,800	208136306

Yearly running cost in 10 large cities$177-$538

Phoenix, AZ$227/yr
Miami, FL$177/yr
Houston, TX$204/yr
Atlanta, GA$219/yr
Los Angeles, CA$216/yr
New York, NY$538/yr
Chicago, IL$440/yr
Denver, CO$368/yr
Seattle, WA$228/yr
Minneapolis, MN$457/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 DUCTLESSAIRE DA0921-H2-O?: The DUCTLESSAIRE DA0921-H2-O is rated at up to 24.0 SEER2 and 14.0 EER2 for cooling and up to 11.4 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
Is the DUCTLESSAIRE DA0921-H2-O good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 7,800 BTU/h at 5°F with a COP of 2.18, so it is still 2.2 times as efficient as electric resistance heat at that temperature.
How much does the DUCTLESSAIRE DA0921-H2-O cost to run per year?: At its rated efficiency it costs about $177-$538 a year in electricity in large U.S. cities, depending on climate and local rates - for example $227 in Phoenix and $457 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 DUCTLESSAIRE DA0921-H2-O?: ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses DA0921-H2-I.
What refrigerant does the DUCTLESSAIRE DA0921-H2-O 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 $230/yrYou save $250/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 DUCTLESSAIRE DA0921-H2-O

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: $230
Current system, per year: $480
You save per year: $250
Payback: 14.0 years
Net after 10 years: -$998

Cooling $132Heating $98Electricity used: 1,439 kWhSaved vs. a minimum-efficiency heat pump: $141

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

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ECO AC EHH-O09BB · cold climate24.0 SEER2 · 11.4 HSPF2
SLIMAIR SHC09VE2AG · cold climate24.0 SEER2 · 11.6 HSPF2
ECO AC EHH-O9BB · cold climate24.0 SEER2 · 11.4 HSPF2
LBG Products LBHB09DUWO · cold climate24.0 SEER2 · 11.6 HSPF2
KANIONco KWSM-09IR410AHS24MV · cold climate24.0 SEER2 · 11.4 HSPF2
Mitsubishi Electric SUZ-KA09NA224.0 SEER2 · 11.9 HSPF2
GARVEE GMS9-2 PRO · cold climate24.0 SEER2 · 10.0 HSPF2

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

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