What is the SEER2 rating of the COSTWAY FP10982US?

The COSTWAY FP10982US is rated at up to 18.6 SEER2 and 11.7 EER2 for cooling and up to 9.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.

Is the COSTWAY FP10982US good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 24,000 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 COSTWAY FP10982US cost to run per year?

At its rated efficiency it costs about $860-$2,380 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,072 in Phoenix and $1,997 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the COSTWAY FP10982US the same as the DUOHOME DOT-D36HNR8-EA01(J0)?

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 COSTWAY FP10982US?

ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses FP10985US.

3-ton central heat pump · FP10982US

COSTWAY FP10982US

Very good cooling efficiency and average heating efficiency for a 3-ton central heat pump, and certified for cold climates.

Ranks #67 of 302 3 ton central heat pumps for cooling efficiency, and costs about $988 a year to run in a mixed climate like Atlanta.

SEER2: 18.6 Cooling efficiency over a season
Very good · beats 79%
HSPF2: 9.0 Heating efficiency over a season
Average · beats 54%
EER2: 11.7 Cooling efficiency on a 95°F day
Average · beats 43%
Heat at 5°F: 24,000 BTU/h70% of its 47°F output
Average · beats 58%

A good fit if…

You want low cooling bills - its SEER2 beats 79% of central heat pumps.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 24,000 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

Specifications3 ton, R-454B

General
Brand	COSTWAY
Also sold as	DUOHOME
Outdoor unit model	FP10982US
Series	FP10982US
Type	Central heat pump
Nominal size	3 ton
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	February 24, 2026
Last certified	April 21, 2026
Cooling
SEER2Seasonal efficiency, higher is better	18.6 (range 18.6)
EER2Efficiency at 95°F outdoors	11.7
Cooling capacity	34,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	9.0
Capacity at 47°F	34,200 BTU/h
Capacity at 17°F	24,000 BTU/h
Capacity at 5°F	24,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.10
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 matchup with FP10985US at the standard test temperatures, in BTU/h:

Certified matchups1 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.
FP10985US · cold climate	18.6	11.7	9.0	24,000	217221416

Same unit, other model numbers1

These model numbers have exactly the same certified ratings and matchups as the COSTWAY FP10982US: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

DUOHOME DOT-D36HNR8-EA01(J0)

Yearly running cost in 10 large cities$860-$2,380

Phoenix, AZ$1,072/yr
Miami, FL$860/yr
Houston, TX$961/yr
Atlanta, GA$988/yr
Los Angeles, CA$965/yr
New York, NY$2,380/yr
Chicago, IL$1,936/yr
Denver, CO$1,613/yr
Seattle, WA$993/yr
Minneapolis, MN$1,997/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 COSTWAY FP10982US?: The COSTWAY FP10982US is rated at up to 18.6 SEER2 and 11.7 EER2 for cooling and up to 9.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
Is the COSTWAY FP10982US good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 24,000 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 COSTWAY FP10982US cost to run per year?: At its rated efficiency it costs about $860-$2,380 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,072 in Phoenix and $1,997 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the COSTWAY FP10982US the same as the DUOHOME DOT-D36HNR8-EA01(J0)?: 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 COSTWAY FP10982US?: ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses FP10985US.
What refrigerant does the COSTWAY FP10982US 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 $1,069/yrYou save $687/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 COSTWAY FP10982US

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: $1,069
Current system, per year: $1,756
You save per year: $687
Payback: 18.9 years
Net after 10 years: -$6,126

Cooling $643Heating $426Electricity used: 6,682 kWhSaved vs. a minimum-efficiency heat pump: $279

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.

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TOSOT TU36W-GDU19.0 SEER2 · 8.3 HSPF2
VillaTherm VHP-UCHA-36HDCT-A · cold climate18.5 SEER2 · 10.0 HSPF2
Blueridge BNG2Z36SCM19.0 SEER2 · 8.3 HSPF2
ECOER EODA18H-2436BAA · cold climate18.5 SEER2 · 9.0 HSPF2
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UTL UCHA-36HDCT · cold climate18.5 SEER2 · 9.0 HSPF2

See all 302 3 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of April 21, 2026. How we use the data.