What is the SEER2 rating of the ComfortStar CZP24CD(O)?

The ComfortStar CZP24CD(O) is rated at up to 22.0 SEER2 and 14.0 EER2 for cooling and up to 11.2 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 7 certified matchups SEER2 ranges from 19.0-22.0.

Is the ComfortStar CZP24CD(O) good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 20,000 BTU/h at 5°F with a COP of 2.30, so it is still 2.3 times as efficient as electric resistance heat at that temperature.

How much does the ComfortStar CZP24CD(O) cost to run per year?

At its rated efficiency it costs about $513-$1,402 a year in electricity in large U.S. cities, depending on climate and local rates - for example $637 in Phoenix and $1,175 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the ComfortStar CZP24CD(O) the same as the DIRECT AIR DIRM-24DA25-1Z?

Yes, as far as the certified ratings go. ENERGY STAR lists both 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 ComfortStar CZP24CD(O)?

ENERGY STAR lists 7 certified combinations for this outdoor unit. The highest-rated ones use COMFORTSTAR CHF24CD(I), COMFORTSTAR TIP24, COMFORTSTAR TPA-24C.

What refrigerant does the ComfortStar CZP24CD(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.

24,000 BTU mini-split heat pump · C series

ComfortStar CZP24CD(O)

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

Ranks #175 of 430 24,000 BTU mini-splits for cooling efficiency, and costs about $584 a year to run in a mixed climate like Atlanta.

SEER2: 22.0 Cooling efficiency over a season
Average · beats 48%
HSPF2: 11.2 Heating efficiency over a season
Very good · beats 79%
EER2: 14.0 Cooling efficiency on a 95°F day
Very good · beats 82%
Heat at 5°F: 20,000 BTU/h62% of its 47°F output
Very good · beats 86%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 20,000 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 79% 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

Specifications24,000 BTU, R-410A

General
Brand	ComfortStar
Also sold as	DIRECT AIR
Outdoor unit model	CZP24CD(O)
Series	C series
Type	Mini-split heat pump
Nominal size	24,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	February 2, 2020
Last certified	May 12, 2026
Cooling
SEER2Seasonal efficiency, higher is better	22.0 (range 19.0-22.0)
EER2Efficiency at 95°F outdoors	12.5-14.0
Cooling capacity	23,000-24,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	9.7-11.2
Capacity at 47°F	24,000-25,000 BTU/h
Capacity at 17°F	16,000-20,000 BTU/h
Capacity at 5°F	15,500-20,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.80-2.30
ENERGY STAR cold climate	Yes

Heating output as it gets colder62% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with CHF24CD(I) at the standard test temperatures, in BTU/h:

Certified matchups7 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.
CHF24CD(I) COMFORTSTAR	22.0	14.0	10.0	15,500	207658925
TIP24 COMFORTSTAR · cold climate	21.5	12.5	9.7	18,500	207765976
TPA-24C COMFORTSTAR · cold climate	21.5	12.5	9.7	18,500	207658946
TPA-24C COMFORTSTAR · cold climate	21.5	12.5	9.7	18,500	207658946
FPA-24 COMFORTSTAR · cold climate	21.2	12.5	10.3	18,200	207658956
FPA-24 COMFORTSTAR · cold climate	21.2	12.5	10.3	18,200	207658956
CPA-24B COMFORTSTAR · cold climate	19.0	12.5	11.2	20,000	207658933

Same unit, other model numbers1

These model numbers have exactly the same certified ratings and matchups as the ComfortStar CZP24CD(O): the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

DIRECT AIR DIRM-24DA25-1Z

Yearly running cost in 10 large cities$513-$1,402

Phoenix, AZ$637/yr
Miami, FL$513/yr
Houston, TX$571/yr
Atlanta, GA$584/yr
Los Angeles, CA$569/yr
New York, NY$1,402/yr
Chicago, IL$1,140/yr
Denver, CO$949/yr
Seattle, WA$584/yr
Minneapolis, MN$1,175/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 ComfortStar CZP24CD(O)?: The ComfortStar CZP24CD(O) is rated at up to 22.0 SEER2 and 14.0 EER2 for cooling and up to 11.2 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 7 certified matchups SEER2 ranges from 19.0-22.0.
Is the ComfortStar CZP24CD(O) good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 20,000 BTU/h at 5°F with a COP of 2.30, so it is still 2.3 times as efficient as electric resistance heat at that temperature.
How much does the ComfortStar CZP24CD(O) cost to run per year?: At its rated efficiency it costs about $513-$1,402 a year in electricity in large U.S. cities, depending on climate and local rates - for example $637 in Phoenix and $1,175 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the ComfortStar CZP24CD(O) the same as the DIRECT AIR DIRM-24DA25-1Z?: Yes, as far as the certified ratings go. ENERGY STAR lists both 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 ComfortStar CZP24CD(O)?: ENERGY STAR lists 7 certified combinations for this outdoor unit. The highest-rated ones use COMFORTSTAR CHF24CD(I), COMFORTSTAR TIP24, COMFORTSTAR TPA-24C.
What refrigerant does the ComfortStar CZP24CD(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 $634/yrYou save $620/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 ComfortStar CZP24CD(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: $634
Current system, per year: $1,254
You save per year: $620
Payback: 14.5 years
Net after 10 years: -$2,801

Cooling $384Heating $250Electricity used: 3,963 kWhSaved vs. a minimum-efficiency heat pump: $330

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

Bosch BMS500-AAS024-1CSXRC · cold climate22.0 SEER2 · 11.2 HSPF2
Cooper&Hunter CH-ES24-230VO · cold climate22.0 SEER2 · 11.2 HSPF2
AC Pro AOD32-24HFN1-MT0W · cold climate22.0 SEER2 · 11.2 HSPF2
Elios DEA24HOS25230E8 · cold climate22.0 SEER2 · 11.2 HSPF2
Fujitsu AOUK024SSAN7 · cold climate22.2 SEER2 · 11.3 HSPF2
Kepler ODUMOD33-24HFN1-MT0W · cold climate22.0 SEER2 · 11.2 HSPF2
Tempstar DLCMHBH24CAK · cold climate22.3 SEER2 · 9.7 HSPF2
MDV MOD33-24HFN1-MT0W · cold climate22.0 SEER2 · 11.2 HSPF2

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

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of May 12, 2026. How we use the data.