What is the SEER2 rating of the DuraSTAR DRU1H18S2A?

The DuraSTAR DRU1H18S2A is rated at up to 19.3 SEER2 and 12.1 EER2 for cooling and up to 10.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 43 certified matchups SEER2 ranges from 15.2-19.3.

Is the DuraSTAR DRU1H18S2A good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 19,600 BTU/h at 5°F with a COP of 2.10, so it is still 2.1 times as efficient as electric resistance heat at that temperature.

How much does the DuraSTAR DRU1H18S2A cost to run per year?

At its rated efficiency it costs about $438-$1,123 a year in electricity in large U.S. cities, depending on climate and local rates - for example $533 in Phoenix and $933 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 DuraSTAR DRU1H18S2A?

ENERGY STAR lists 43 certified combinations for this outdoor unit. The highest-rated ones use DRUF1820S2A, DRUM1824S2A, DRUC2417S2A.

1.5-ton central heat pump · DRU Series

DuraSTAR DRU1H18S2A

Very good cooling efficiency and excellent heating efficiency for a 1.5-ton central heat pump, and certified for cold climates.

Ranks #11 of 170 1.5 ton central heat pumps for cooling efficiency, and costs about $474 a year to run in a mixed climate like Atlanta.

SEER2: 19.3 Cooling efficiency over a season
Very good · beats 89%
HSPF2: 10.8 Heating efficiency over a season
Excellent · beats 98%
EER2: 12.1 Cooling efficiency on a 95°F day
Very good · beats 74%
Heat at 5°F: 19,600 BTU/h103% of its 47°F output
Average · beats 58%

A good fit if…

You want low cooling bills - its SEER2 beats 89% of central heat pumps.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 19,600 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 98% of central heat pumps.
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

Specifications1.5 ton, R-454B

General
Brand	DuraSTAR
Outdoor unit model	DRU1H18S2A
Series	DRU Series
Type	Central heat pump
Nominal size	1.5 ton
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	December 8, 2020
Last certified	July 16, 2026
Cooling
SEER2Seasonal efficiency, higher is better	19.3 (range 15.2-19.3)
EER2Efficiency at 95°F outdoors	11.0-12.5
Cooling capacity	18,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.9-10.8
Capacity at 47°F	18,000-19,000 BTU/h
Capacity at 17°F	13,000-15,300 BTU/h
Capacity at 5°F	17,000-19,600 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.70-2.10
ENERGY STAR cold climate	Yes

Heating output as it gets colder103% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with DRUF1820S2A at the standard test temperatures, in BTU/h:

Certified matchups43 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. Ask your installer for the AHRI reference number of the exact system you are quoted.

Indoor unit	Furnace	SEER2	EER2	HSPF2	Heat @5°F	AHRI ref.
DRUF1820S2A · cold climate	-	19.3	12.1	10.8	19,600	217465406
DRUM1824S2A · cold climate	-	19.0	12.5	9.7	18,000	215374884
DRUC2417S2A · cold climate	RG19080B12MPS1	18.0	11.8	10.6	19,000	218072007
DRUC2417S2A · cold climate	S9V2B040U3VS***	18.0	11.7	9.1	18,000	218071818
DRUC2414S2A · cold climate	RG19040A10MPS1	17.9	11.1	9.6	18,000	218072005
DRUC2414S2A · cold climate	RG19060A10MPS1	17.7	11.3	9.5	18,000	218072006
DRUC2417S2A · cold climate	S9V2B080U4VS***	17.4	11.4	9.4	18,000	218071822
DRUC2417S2A · cold climate	S9V2B080D4VS***	17.4	11.4	9.2	18,000	218071821
DRUC2417S2A · cold climate	S9V2B060U4VS***	17.4	11.4	9.0	18,000	218071820
DRUC2417S2A · cold climate	S9V2B040D3VS***	17.3	11.4	9.3	18,000	218071817
DRUC2417S2A · cold climate	S9V2B060D3VS***	17.3	11.6	9.1	18,000	218071819
DRUC2417S2A · cold climate	ML193DF070XE36B*	17.2	11.7	9.9	18,000	218072261
DRUC2417S2A · cold climate	ML296UH070XV36B*	17.0	11.1	9.9	19,000	218072280
DRUC2417S2A · cold climate	ML193DF045XE36B*	17.0	11.6	9.8	18,000	218072260
DRUC2414S2A · cold climate	RL18060A12MPS1	17.0	11.7	9.6	18,000	218072063
DRUC2417S2A · cold climate	ML296UH045XV36B*	16.9	11.1	9.6	18,000	218072279
DRUC2417S2A · cold climate	ML193UH070XE36B*	16.8	11.6	9.7	18,000	218072264
DRUC2414S2A · cold climate	MGV80M060A3A	16.7	11.2	9.4	18,000	218071767
DRUC2417S2A · cold climate	S9X2B040D3PSB**	16.6	11.3	9.5	18,000	218071939
DRUC2417S2A · cold climate	S9X1B040D3PSB**	16.6	11.3	9.5	18,000	218071825
DRUC2417S2A · cold climate	RL18080B12MPS1	16.5	11.9	9.9	19,000	218072064
DRUC2414S2A · cold climate	RL18040A12MPS1	16.5	11.7	9.7	18,000	218072062
DRUC2414S2A · cold climate	MGV80M040A3A	16.5	11.1	9.3	18,000	218071766
DRUC2417S2A · cold climate	ML296DF045XV36B*	16.4	11.0	9.7	18,000	218072278
DRUC2417S2A · cold climate	ML193UH045XE36B*	16.4	11.4	9.6	18,000	218072263
DRUC2417S2A · cold climate	MGV96U060B3C	16.3	11.8	10.1	18,000	218071735
DRUC2417S2A · cold climate	ML196UH030XE36B*	16.2	11.2	9.5	18,000	218072272
DRUC2417S2A · cold climate	MGV96U080B3C	16.1	11.7	10.0	18,000	218071736
DRUC2414S2A · cold climate	-	16.1	11.7	9.5	18,000	217493430
DRUC2417S2A · cold climate	-	16.1	11.7	9.5	18,000	217493432
DRUC2417S2A	ML193UH030XE36B*	16.0	11.2	8.9	17,000	218072262
DRUC2417S2A · cold climate	ML196UH070XE36B*	15.9	11.6	9.6	18,000	218072274
DRUC2417S2A · cold climate	RG19060B12MPS1	15.8	11.6	10.1	19,000	218071720
DRUC2417S2A · cold climate	ML196DF045XE36B*	15.6	11.4	9.3	18,000	218072270
DRUC2417S2A · cold climate	ML196UH045XE36B*	15.5	11.3	9.3	18,000	218072273
DRUC2417S2A · cold climate	DR95M4AT0401317S	15.4	11.3	9.4	18,000	218679562
DRUC2417S2A · cold climate	DR95M4AT0601317S	15.3	11.6	9.9	19,000	218679563
DRUC2417S2A · cold climate	MGV80M080B4A	15.3	11.4	9.6	18,000	218071769
DRUC2417S2A · cold climate	S9X2B040U3PSB**	15.3	11.3	9.3	18,000	218071940
DRUC2417S2A · cold climate	S9X1B040U3PSB**	15.3	11.3	9.3	18,000	218071826
DRUC2417S2A · cold climate	ML196DF070XE48B*	15.2	11.4	9.5	18,000	218072271
DRUC2417S2A · cold climate	S9X2B060D3PSB**	15.2	11.4	9.3	18,000	218071941
DRUC2417S2A · cold climate	S9X1B060D3PSB**	15.2	11.4	9.3	18,000	218071827

Yearly running cost in 10 large cities$438-$1,123

Phoenix, AZ$533/yr
Miami, FL$438/yr
Houston, TX$477/yr
Atlanta, GA$474/yr
Los Angeles, CA$460/yr
New York, NY$1,123/yr
Chicago, IL$910/yr
Denver, CO$755/yr
Seattle, WA$462/yr
Minneapolis, MN$933/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 DuraSTAR DRU1H18S2A?: The DuraSTAR DRU1H18S2A is rated at up to 19.3 SEER2 and 12.1 EER2 for cooling and up to 10.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 43 certified matchups SEER2 ranges from 15.2-19.3.
Is the DuraSTAR DRU1H18S2A good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 19,600 BTU/h at 5°F with a COP of 2.10, so it is still 2.1 times as efficient as electric resistance heat at that temperature.
How much does the DuraSTAR DRU1H18S2A cost to run per year?: At its rated efficiency it costs about $438-$1,123 a year in electricity in large U.S. cities, depending on climate and local rates - for example $533 in Phoenix and $933 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 DuraSTAR DRU1H18S2A?: ENERGY STAR lists 43 certified combinations for this outdoor unit. The highest-rated ones use DRUF1820S2A, DRUM1824S2A, DRUC2417S2A.
What refrigerant does the DuraSTAR DRU1H18S2A 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 $525/yrYou save $419/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 DuraSTAR DRU1H18S2A

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: $525
Current system, per year: $944
You save per year: $419
Payback: 16.7 years
Net after 10 years: -$2,808

Cooling $328Heating $197Electricity used: 3,283 kWhSaved vs. a minimum-efficiency heat pump: $201

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 1.5 ton models

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Innovair SHV18H2BA · cold climate19.3 SEER2 · 10.8 HSPF2
ComfortStar CPH3-18CD(O) · cold climate19.3 SEER2 · 10.8 HSPF2
Innovair SHV18H2R20 · cold climate19.3 SEER2 · 10.8 HSPF2
Comfort-Aire A-VXP18SA-1 · cold climate19.3 SEER2 · 10.8 HSPF2
Mainline ML18HP230LMNTH-O · cold climate19.3 SEER2 · 10.8 HSPF2
Carrier 37MUHAQ18AA3 · cold climate19.3 SEER2 · 10.8 HSPF2
MDV MOX430-18HFN10-M3X · cold climate19.3 SEER2 · 10.8 HSPF2

See all 170 1.5 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of July 16, 2026. How we use the data.