What is the SEER2 rating of the Ducane 4DHP2S09S-1P?

The Ducane 4DHP2S09S-1P is rated at up to 25.5 SEER2 and 15.0 EER2 for cooling and up to 12.3 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 24 certified matchups SEER2 ranges from 19.2-25.5.

Is the Ducane 4DHP2S09S-1P good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 8,000 BTU/h at 5°F with a COP of 2.17, so it is still 2.2 times as efficient as electric resistance heat at that temperature.

How much does the Ducane 4DHP2S09S-1P cost to run per year?

At its rated efficiency it costs about $167-$500 a year in electricity in large U.S. cities, depending on climate and local rates - for example $213 in Phoenix and $424 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 Ducane 4DHP2S09S-1P?

ENERGY STAR lists 24 certified combinations for this outdoor unit. The highest-rated ones use DUCANE DWM209S4-1P, AirEase DWM209S4-1P, Allied DWM209S4-1P.

What refrigerant does the Ducane 4DHP2S09S-1P 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 · 4DH SERIES

Ducane 4DHP2S09S-1P

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

Ranks #153 of 395 9,000 BTU mini-splits for cooling efficiency, and costs about $204 a year to run in a mixed climate like Atlanta.

SEER2: 25.5 Cooling efficiency over a season
Very good · beats 88%
HSPF2: 12.3 Heating efficiency over a season
Excellent · beats 92%
EER2: 15.0 Cooling efficiency on a 95°F day
Excellent · beats 91%
Heat at 5°F: 8,000 BTU/h75% of its 47°F output
Very good · beats 75%

A good fit if…

You want low cooling bills - its SEER2 beats 88% of mini-splits.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 8,000 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 92% 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	Ducane
Also sold as	AIREASE, Concord, Armstrong Air, ALLIED
Outdoor unit model	4DHP2S09S-1P
Series	4DH 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	January 1, 2022
Last certified	May 12, 2026
Cooling
SEER2Seasonal efficiency, higher is better	25.5 (range 19.2-25.5)
EER2Efficiency at 95°F outdoors	12.5-15.0
Cooling capacity	9,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	10.0-12.3
Capacity at 47°F	10,000 BTU/h
Capacity at 17°F	7,500-8,500 BTU/h
Capacity at 5°F	7,400-8,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.90-2.17
ENERGY STAR cold climate	Yes

Heating output as it gets colder75% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with DWM209S4-1P at the standard test temperatures, in BTU/h:

Certified matchups24 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.
DWM209S4-1P DUCANE · cold climate	25.5	15.0	12.3	7,500	208128194
DWM209S4-1P DUCANE · cold climate	25.5	15.0	12.3	7,500	208128194
DWM209S4-1P AirEase · cold climate	25.5	15.0	12.3	7,500	208128185
DWM209S4-1P Allied · cold climate	25.5	15.0	12.3	7,500	208128182
DWM209S4-1P Armstrong Air · cold climate	25.5	15.0	12.3	7,500	208128188
DWM209S4-1P Allied · cold climate	25.5	15.0	12.3	7,500	208128182
DWM209S4-1P CONCORD · cold climate	25.5	15.0	12.3	7,500	208128191
DWM209S4-1P CONCORD · cold climate	25.5	15.0	12.3	7,500	208128191
DWM209S4-1P Armstrong Air · cold climate	25.5	15.0	12.3	7,500	208128188
D22C109S4-1P Armstrong Air · cold climate	20.0	13.0	10.0	7,400	208128189
D22C109S4-1P DUCANE · cold climate	20.0	13.0	10.0	7,400	208128195
D22C109S4-1P CONCORD · cold climate	20.0	13.0	10.0	7,400	208128192
D22C109S4-1P CONCORD · cold climate	20.0	13.0	10.0	7,400	208128192
D22C109S4-1P AirEase · cold climate	20.0	13.0	10.0	7,400	208128186
D22C109S4-1P Allied · cold climate	20.0	13.0	10.0	7,400	208128183
D22C109S4-1P DUCANE · cold climate	20.0	13.0	10.0	7,400	208128195
D22C109S4-1P AirEase · cold climate	20.0	13.0	10.0	7,400	208128186
DMD209S4-1P DUCANE · cold climate	19.2	12.5	10.2	8,000	208128196
DMD209S4-1P Armstrong Air · cold climate	19.2	12.5	10.2	8,000	208128190
DMD209S4-1P AirEase · cold climate	19.2	12.5	10.2	8,000	208128187
DMD209S4-1P DUCANE · cold climate	19.2	12.5	10.2	8,000	208128196
DMD209S4-1P CONCORD · cold climate	19.2	12.5	10.2	8,000	208128193
DMD209S4-1P Allied · cold climate	19.2	12.5	10.2	8,000	208128184
DMD209S4-1P AirEase · cold climate	19.2	12.5	10.2	8,000	208128187

Yearly running cost in 10 large cities$167-$500

Phoenix, AZ$213/yr
Miami, FL$167/yr
Houston, TX$191/yr
Atlanta, GA$204/yr
Los Angeles, CA$201/yr
New York, NY$500/yr
Chicago, IL$409/yr
Denver, CO$342/yr
Seattle, WA$211/yr
Minneapolis, MN$424/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 Ducane 4DHP2S09S-1P?: The Ducane 4DHP2S09S-1P is rated at up to 25.5 SEER2 and 15.0 EER2 for cooling and up to 12.3 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 24 certified matchups SEER2 ranges from 19.2-25.5.
Is the Ducane 4DHP2S09S-1P good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 8,000 BTU/h at 5°F with a COP of 2.17, so it is still 2.2 times as efficient as electric resistance heat at that temperature.
How much does the Ducane 4DHP2S09S-1P cost to run per year?: At its rated efficiency it costs about $167-$500 a year in electricity in large U.S. cities, depending on climate and local rates - for example $213 in Phoenix and $424 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 Ducane 4DHP2S09S-1P?: ENERGY STAR lists 24 certified combinations for this outdoor unit. The highest-rated ones use DUCANE DWM209S4-1P, AirEase DWM209S4-1P, Allied DWM209S4-1P.
What refrigerant does the Ducane 4DHP2S09S-1P 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 $215/yrYou save $265/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 Ducane 4DHP2S09S-1P

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: $215
Current system, per year: $480
You save per year: $265
Payback: 13.2 years
Net after 10 years: -$849

Cooling $124Heating $91Electricity used: 1,346 kWhSaved vs. a minimum-efficiency heat pump: $156

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

DIRECT AIR DIRM-09DA25-1Z · cold climate25.5 SEER2 · 12.3 HSPF2
Kaden KO-PSX09HP-2AAMA · cold climate25.5 SEER2 · 12.3 HSPF2
Cooper&Hunter CH-ES09-230VO · cold climate25.5 SEER2 · 12.3 HSPF2
Kepler ODUMOX230-09HFN1-MW5W · cold climate25.5 SEER2 · 12.3 HSPF2
ComfortStar CZP09CD(O) · cold climate25.5 SEER2 · 12.3 HSPF2
MRCOOL O-ES-09-HP-C-230B · cold climate25.5 SEER2 · 12.3 HSPF2
AC Pro AOX230-09HFN1-MW5W · cold climate25.5 SEER2 · 12.3 HSPF2
MDV MOX230-09HFN10-B1 · cold climate25.5 SEER2 · 10.7 HSPF2

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

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