What is the SEER2 rating of the DIRECT AIR DIRM4-27DA25-3Z?

The DIRECT AIR DIRM4-27DA25-3Z is rated at up to 25.0 SEER2 and 13.0 EER2 for cooling and up to 10.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 6 certified matchups SEER2 ranges from 19.0-25.0.

Is the DIRECT AIR DIRM4-27DA25-3Z good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 27,000 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.

How much does the DIRECT AIR DIRM4-27DA25-3Z cost to run per year?

At its rated efficiency it costs about $511-$1,573 a year in electricity in large U.S. cities, depending on climate and local rates - for example $658 in Phoenix and $1,336 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

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

DIRECT AIR DIRM4-27DA25-3Z

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

Ranks #26 of 430 24,000 BTU mini-splits for cooling efficiency, and costs about $638 a year to run in a mixed climate like Atlanta.

SEER2: 25.0 Cooling efficiency over a season
Very good · beats 83%
HSPF2: 10.5 Heating efficiency over a season
Average · beats 61%
EER2: 13.0 Cooling efficiency on a 95°F day
Average · beats 62%
Heat at 5°F: 27,000 BTU/h70% of its 47°F output
Average · beats 48%

A good fit if…

You want low cooling bills - its SEER2 beats 83% of mini-splits.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 27,000 BTU/h at 5°F.
You want steady temperatures and quiet running - the compressor varies its speed.

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	DIRECT AIR
Outdoor unit model	DIRM4-27DA25-3Z
Series	DIRM 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	May 15, 2024
Last certified	May 6, 2026
Cooling
SEER2Seasonal efficiency, higher is better	25.0 (range 19.0-25.0)
EER2Efficiency at 95°F outdoors	12.0-13.0
Cooling capacity	26,600-28,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	9.0-10.5
Capacity at 47°F	26,600-28,000 BTU/h
Capacity at 17°F	19,800-30,000 BTU/h
Capacity at 5°F	18,800-27,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.00
ENERGY STAR cold climate	Yes

Heating output as it gets colder70% 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 matchups6 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	25.0	13.0	9.5	19,000	216683820
- · cold climate	23.0	12.5	10.5	27,000	215213790
- · cold climate	23.0	12.5	9.3	18,900	216683822
- · cold climate	21.0	12.3	10.0	27,000	215213792
- · cold climate	21.0	12.0	9.0	18,800	216683821
- · cold climate	19.0	12.0	9.5	27,000	215213791

Yearly running cost in 10 large cities$511-$1,573

Phoenix, AZ$658/yr
Miami, FL$511/yr
Houston, TX$591/yr
Atlanta, GA$638/yr
Los Angeles, CA$630/yr
New York, NY$1,573/yr
Chicago, IL$1,287/yr
Denver, CO$1,077/yr
Seattle, WA$668/yr
Minneapolis, MN$1,336/yr

At each state's average electricity price and the city's typical heating and cooling hours.

Questions4

What is the SEER2 rating of the DIRECT AIR DIRM4-27DA25-3Z?: The DIRECT AIR DIRM4-27DA25-3Z is rated at up to 25.0 SEER2 and 13.0 EER2 for cooling and up to 10.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 6 certified matchups SEER2 ranges from 19.0-25.0.
Is the DIRECT AIR DIRM4-27DA25-3Z good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 27,000 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
How much does the DIRECT AIR DIRM4-27DA25-3Z cost to run per year?: At its rated efficiency it costs about $511-$1,573 a year in electricity in large U.S. cities, depending on climate and local rates - for example $658 in Phoenix and $1,336 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
What refrigerant does the DIRECT AIR DIRM4-27DA25-3Z 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 $668/yrYou save $724/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 DIRECT AIR DIRM4-27DA25-3Z

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: $668
Current system, per year: $1,392
You save per year: $724
Payback: 13.8 years
Net after 10 years: -$2,760

Cooling $380Heating $288Electricity used: 4,176 kWhSaved vs. a minimum-efficiency heat pump: $400

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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AUX AMAR24HP230V2CO · cold climate25.0 SEER2 · 10.5 HSPF2
Airquest D5CMRAH24DAK · cold climate25.0 SEER2 · 9.5 HSPF2
AUX AMAR24HP230V1CO · cold climate25.0 SEER2 · 10.5 HSPF2
Bosch BMS500-AAM027-1CSXRD · cold climate25.0 SEER2 · 9.5 HSPF2
MDV MOD30-24HFN10-M1H · cold climate25.0 SEER2 · 11.0 HSPF2
MDV M4OD30-24HFN10-M1D · cold climate25.0 SEER2 · 9.5 HSPF2

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

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of May 6, 2026. How we use the data.