What is the SEER2 rating of the Continental CDHAM-28-O?

The Continental CDHAM-28-O is rated at up to 22.6 SEER2 and 11.8 EER2 for cooling and up to 9.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 2 certified matchups SEER2 ranges from 21.3-22.6.

Is the Continental CDHAM-28-O good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 25,000 BTU/h at 5°F with a COP of 1.80, so it is still 1.8 times as efficient as electric resistance heat at that temperature.

How much does the Continental CDHAM-28-O cost to run per year?

At its rated efficiency it costs about $585-$1,757 a year in electricity in large U.S. cities, depending on climate and local rates - for example $748 in Phoenix and $1,489 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

What refrigerant does the Continental CDHAM-28-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.

30,000 BTU mini-split heat pump · CDHA series

Continental CDHAM-28-O

Average cooling efficiency and below average heating efficiency for a 30,000 BTU mini-split heat pump, and certified for cold climates.

Ranks #48 of 171 30,000 BTU mini-splits for cooling efficiency, and costs about $716 a year to run in a mixed climate like Atlanta.

SEER2: 22.6 Cooling efficiency over a season
Average · beats 57%
HSPF2: 9.8 Heating efficiency over a season
Below average · beats 33%
EER2: 11.8 Cooling efficiency on a 95°F day
Below average · beats 18%
Heat at 5°F: 25,000 BTU/h89% of its 47°F output
Below average · beats 9%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 25,000 BTU/h at 5°F.
You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

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	Continental
Outdoor unit model	CDHAM-28-O
Series	CDHA 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	October 1, 2023
Last certified	June 25, 2026
Cooling
SEER2Seasonal efficiency, higher is better	22.6 (range 21.3-22.6)
EER2Efficiency at 95°F outdoors	11.8-11.8
Cooling capacity	28,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	9.7-9.8
Capacity at 47°F	28,000 BTU/h
Capacity at 17°F	25,600-26,200 BTU/h
Capacity at 5°F	25,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.80
ENERGY STAR cold climate	Yes

Heating output as it gets colder89% 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 matchups2 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.
- CONTINENTAL · cold climate	22.6	11.8	9.8	25,000	213386541
- CONTINENTAL · cold climate	21.3	11.8	9.7	25,000	213386543

Yearly running cost in 10 large cities$585-$1,757

Phoenix, AZ$748/yr
Miami, FL$585/yr
Houston, TX$672/yr
Atlanta, GA$716/yr
Los Angeles, CA$705/yr
New York, NY$1,757/yr
Chicago, IL$1,435/yr
Denver, CO$1,200/yr
Seattle, WA$743/yr
Minneapolis, MN$1,489/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 Continental CDHAM-28-O?: The Continental CDHAM-28-O is rated at up to 22.6 SEER2 and 11.8 EER2 for cooling and up to 9.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 2 certified matchups SEER2 ranges from 21.3-22.6.
Is the Continental CDHAM-28-O good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 25,000 BTU/h at 5°F with a COP of 1.80, so it is still 1.8 times as efficient as electric resistance heat at that temperature.
How much does the Continental CDHAM-28-O cost to run per year?: At its rated efficiency it costs about $585-$1,757 a year in electricity in large U.S. cities, depending on climate and local rates - for example $748 in Phoenix and $1,489 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
What refrigerant does the Continental CDHAM-28-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 $756/yrYou save $688/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 Continental CDHAM-28-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: $756
Current system, per year: $1,444
You save per year: $688
Payback: 15.3 years
Net after 10 years: -$3,624

Cooling $436Heating $320Electricity used: 4,726 kWhSaved vs. a minimum-efficiency heat pump: $351

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 30,000 BTU models

Samsung AC030DXSCCG · cold climate22.8 SEER2 · 10.7 HSPF2
ECO AC EMH-3O27BBH · cold climate22.6 SEER2 · 9.8 HSPF2
Lennox MMLD030S6S-1P · cold climate22.8 SEER2 · 10.7 HSPF2
Goodman MST283G22MHAA · cold climate22.6 SEER2 · 9.8 HSPF2
NG Trade MOSA32301 · cold climate23.0 SEER2 · 10.0 HSPF2
LBG Products LMUHB27DO · cold climate22.6 SEER2 · 9.8 HSPF2
AUX ASPR30HPMULO · cold climate23.0 SEER2 · 10.0 HSPF2
Napoleon NDHAM-28-O · cold climate22.6 SEER2 · 9.8 HSPF2

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

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of June 25, 2026. How we use the data.