What is the SEER2 rating of the COSTWAY FP10983US?

The COSTWAY FP10983US is rated at up to 17.0 SEER2 and 10.0 EER2 for cooling and up to 8.6 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.

Is the COSTWAY FP10983US good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 42,500 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 FP10983US cost to run per year?

At its rated efficiency it costs about $1,535-$4,170 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,902 in Phoenix and $3,491 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the COSTWAY FP10983US the same as the DUOHOME DOT-D60HNR8-GA01(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 FP10983US?

ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses FP10986US.

5-ton central heat pump · FP10983US

COSTWAY FP10983US

Average cooling and heating efficiency for a 5-ton central heat pump, and certified for cold climates.

Ranks #40 of 100 5 ton central heat pumps for cooling efficiency, and costs about $1,738 a year to run in a mixed climate like Atlanta.

SEER2: 17.0 Cooling efficiency over a season
Average · beats 49%
HSPF2: 8.6 Heating efficiency over a season
Average · beats 45%
EER2: 10.0 Cooling efficiency on a 95°F day
Below average · beats 10%
Heat at 5°F: 42,500 BTU/h75% of its 47°F output
Average · beats 58%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 42,500 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

Specifications5 ton, R-454B

General
Brand	COSTWAY
Also sold as	DUOHOME
Outdoor unit model	FP10983US
Series	FP10983US
Type	Central heat pump
Nominal size	5 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	17.0 (range 17.0)
EER2Efficiency at 95°F outdoors	10.0
Cooling capacity	55,500 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.6
Capacity at 47°F	57,000 BTU/h
Capacity at 17°F	42,000 BTU/h
Capacity at 5°F	42,500 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 colder75% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with FP10986US 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.
FP10986US · cold climate	17.0	10.0	8.6	42,500	217221417

Same unit, other model numbers1

These model numbers have exactly the same certified ratings and matchups as the COSTWAY FP10983US: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

DUOHOME DOT-D60HNR8-GA01(J0)

Yearly running cost in 10 large cities$1,535-$4,170

Phoenix, AZ$1,902/yr
Miami, FL$1,535/yr
Houston, TX$1,705/yr
Atlanta, GA$1,738/yr
Los Angeles, CA$1,694/yr
New York, NY$4,170/yr
Chicago, IL$3,389/yr
Denver, CO$2,820/yr
Seattle, WA$1,735/yr
Minneapolis, MN$3,491/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 FP10983US?: The COSTWAY FP10983US is rated at up to 17.0 SEER2 and 10.0 EER2 for cooling and up to 8.6 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
Is the COSTWAY FP10983US good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 42,500 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 FP10983US cost to run per year?: At its rated efficiency it costs about $1,535-$4,170 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,902 in Phoenix and $3,491 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the COSTWAY FP10983US the same as the DUOHOME DOT-D60HNR8-GA01(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 FP10983US?: ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses FP10986US.
What refrigerant does the COSTWAY FP10983US 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 $1,892/yrYou save $995/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 FP10983US

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: $1,892
Current system, per year: $2,886
You save per year: $995
Payback: 21.1 years
Net after 10 years: -$11,052

Cooling $1,149Heating $742Electricity used: 11,822 kWhSaved vs. a minimum-efficiency heat pump: $326

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 5 ton models

Samsung AC060FCUPCG · cold climate17.0 SEER2 · 9.0 HSPF2
AUX AHU60HPV1BO · cold climate16.5 SEER2 · 9.5 HSPF2
Sure SP17AY60AJVC · cold climate17.0 SEER2 · 9.5 HSPF2
ECOTEMP W4H7T60*K*AAA16.5 SEER2 · 8.1 HSPF2
Rheem RP17AY60AJVC · cold climate17.0 SEER2 · 9.5 HSPF2
Arcoaire D5CUHAH60AAK+TIC2025-0016 · cold climate16.0 SEER2 · 9.0 HSPF2
Friedrich FRP17AY60AJVC · cold climate17.0 SEER2 · 9.5 HSPF2
Bryant 37MUHAQ60AA3+KSAIC0701230 · cold climate16.0 SEER2 · 9.0 HSPF2

See all 100 5 ton central heat pumps, ranked

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