What is the SEER2 rating of the Ameristar A5HP5048A1?

The Ameristar A5HP5048A1 is rated at up to 16.0 SEER2 and 12.0 EER2 for cooling and up to 8.1 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 156 certified matchups SEER2 ranges from 15.2-16.0.

Is the Ameristar A5HP5048A1 good for cold climates?

It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 3.5-ton model.

How much does the Ameristar A5HP5048A1 cost to run per year?

At its rated efficiency it costs about $1,291-$3,373 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,581 in Phoenix and $2,809 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 Ameristar A5HP5048A1?

ENERGY STAR lists 156 certified combinations for this outdoor unit. The highest-rated ones use 5TXCD010AS3+TSTAT, A5AHV006A1D3+TDR+TSTAT, A5AHV007A1D3+TDR+TSTAT.

3.5-ton central heat pump · A5HP5

Ameristar A5HP5048A1

Below average cooling and heating efficiency for a 3.5-ton central heat pump, but not rated for cold climates.

Ranks #70 of 138 3.5 ton central heat pumps for cooling efficiency, and costs about $1,419 a year to run in a mixed climate like Atlanta.

SEER2: 16.0 Cooling efficiency over a season
Below average · beats 26%
HSPF2: 8.1 Heating efficiency over a season
Below average · beats 20%
EER2: 12.0 Cooling efficiency on a 95°F day
Average · beats 64%
Heat at 5°F: 22,600 BTU/h51% of its 47°F output
Very good · beats 88%

A good fit if…

You want a choice of indoor units - 156 certified pairings.

Think twice if…

You often see nights below 0°F - it is not cold-climate certified.
Cooling cost matters most - its SEER2 is below average for central heat pumps.
You mainly need heat - its HSPF2 is below average for central heat pumps.
Comfort and noise matter - a single-stage compressor runs only full-on or off.

Calculate my running cost

Details

Specifications3.5 ton, R-454B

General
Brand	Ameristar
Also sold as	RunTru
Outdoor unit model	A5HP5048A1
Series	A5HP5
Type	Central heat pump
Nominal size	3.5 ton
CompressorVariable-speed units run longer at low power	Single stage
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	February 19, 2024
Last certified	May 1, 2026
Cooling
SEER2Seasonal efficiency, higher is better	16.0 (range 15.2-16.0)
EER2Efficiency at 95°F outdoors	11.7-12.0
Cooling capacity	43,000-45,500 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8-8.1
Capacity at 47°F	41,500-44,500 BTU/h
Capacity at 17°F	27,600-29,400 BTU/h
Capacity at 5°F	21,400-22,600 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.00-2.30
ENERGY STAR cold climate	No

Heating output as it gets colder51% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with 5TXCD010AS3+TSTAT at the standard test temperatures, in BTU/h:

Certified matchups156 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 156 are shown. 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.
5TXCD010AS3+TSTAT	A952V120DU5SA	16.0	12.0	8.1	22,200	214296692
5TXCD010AS3+TSTAT	A952V120DU5SA	16.0	12.0	8.1	22,200	214296693
5TXCD010AS3+TSTAT	A952V120DU5SB	16.0	12.0	8.1	22,200	214296694
5TXCD010AS3+TSTAT	A952V120DU5SB	16.0	12.0	8.1	22,200	214296695
A5AHV006A1D3+TDR+TSTAT	-	16.0	12.0	8.1	22,600	214296702
A5AHV006A1D3+TDR+TSTAT	-	16.0	12.0	8.1	22,600	214296703
A5AHV007A1D3+TDR+TSTAT	-	16.0	12.0	8.1	22,600	214296704
A5AHV007A1D3+TDR+TSTAT	-	16.0	12.0	8.1	22,600	214296705
5PX*C009AS3+TSTAT+P0V0C000M50SD	-	16.0	12.0	8.1	22,200	215575574
5PX*C009AS3+TSTAT+P0V0C000M50SD	-	16.0	12.0	8.1	22,200	215575575
5PX*D008AS3+TSTAT+P0V0D000M50SD	-	16.0	12.0	8.1	22,400	215575618
5PX*D008AS3+TSTAT+P0V0D000M50SD	-	16.0	12.0	8.1	22,400	215575619
5PX*D010AS3+TSTAT+P0V0D000M50SD	-	16.0	12.0	8.1	22,000	215575658
5PX*D010AS3+TSTAT+P0V0D000M50SD	-	16.0	12.0	8.1	22,000	215575659
5PX*D010AS3+TSTAT	A801X120DM5SD	16.0	12.0	8.1	22,200	215575660
5PX*D010AS3+TSTAT	A801X120DM5SD	16.0	12.0	8.1	22,200	215575661
5PX*D010AS3+TSTAT	A801X120DM5TD	16.0	12.0	8.1	22,200	215575662
5PX*D010AS3+TSTAT	A801X120DM5TD	16.0	12.0	8.1	22,200	215575663
5PX*D010AS3+TSTAT+P0V0C000M50SD	-	16.0	12.0	8.1	21,400	215575672
5PX*D010AS3+TSTAT+P0V0C000M50SD	-	16.0	12.0	8.1	21,400	215575673
5PX*D010AS3+TSTAT	A952V120DU5SB	16.0	12.0	8.1	22,200	215575678
5PX*D010AS3+TSTAT	A952V120DU5SB	16.0	12.0	8.1	22,200	215575679
5TXCC009AS3+TSTAT+P0V0C000M50SD	-	16.0	12.0	8.1	22,200	215575720
5TXCC009AS3+TSTAT+P0V0C000M50SD	-	16.0	12.0	8.1	22,200	215575721
5TXCD008AS3+TSTAT+P0V0D000M50SD	-	16.0	12.0	8.1	22,400	215575728
5TXCD008AS3+TSTAT+P0V0D000M50SD	-	16.0	12.0	8.1	22,400	215575729
5TXCD010AS3+TSTAT	L8V1C100U5VSB	16.0	12.0	7.8	21,600	214296696
5TXCD010AS3+TSTAT	L8V1C100U5VSB	16.0	12.0	7.8	21,600	214296697
5PX*D010AS3+TSTAT	L8V1C100U5VSB	16.0	12.0	7.8	21,600	215575664
5PX*D010AS3+TSTAT	L8V1C100U5VSB	16.0	12.0	7.8	21,600	215575665
5PX*D010AS3+TSTAT	A951X120DU5SA	15.5	12.0	8.1	22,200	215575668
5PX*D010AS3+TSTAT	A951X120DU5SA	15.5	12.0	8.1	22,200	215575669
5PX*C009AS3+TSTAT	A952V080CU5SB	15.5	12.0	7.8	22,200	215575570
5PX*C009AS3+TSTAT	A952V080CU5SB	15.5	12.0	7.8	22,200	215575571
5PX*C009AS3+TSTAT	A952V100CU5SB	15.5	12.0	7.8	22,200	215575578
5PX*C009AS3+TSTAT	A952V100CU5SB	15.5	12.0	7.8	22,200	215575579
5PX*C009AS3+TSTAT	A801X080CM5TD	15.5	12.0	7.8	22,000	215575580
5PX*C009AS3+TSTAT	A801X080CM5TD	15.5	12.0	7.8	22,000	215575581
5PX*C009AS3+TSTAT	A801X080CM5SD	15.5	12.0	7.8	22,000	215575592
5PX*C009AS3+TSTAT	A801X080CM5SD	15.5	12.0	7.8	22,000	215575593
5PX*D010AS3+TSTAT	A801X080CM5TD	15.5	12.0	7.8	21,400	215575654
5PX*D010AS3+TSTAT	A801X080CM5TD	15.5	12.0	7.8	21,400	215575655
5PX*D010AS3+TSTAT	A951X080CU5SA	15.5	12.0	7.8	21,800	215575656
5PX*D010AS3+TSTAT	A951X080CU5SA	15.5	12.0	7.8	21,800	215575657
5PX*D010AS3+TSTAT	A801X080CM5SD	15.5	12.0	7.8	21,400	215575680
5PX*D010AS3+TSTAT	A801X080CM5SD	15.5	12.0	7.8	21,400	215575681
5TXCC009AS3+TSTAT	A801X080CM5TD	15.5	12.0	7.8	22,000	215575702
5TXCC009AS3+TSTAT	A801X080CM5TD	15.5	12.0	7.8	22,000	215575703
5TXCC009AS3+TSTAT	A801X080CM5SD	15.5	12.0	7.8	22,000	215575704
5TXCC009AS3+TSTAT	A801X080CM5SD	15.5	12.0	7.8	22,000	215575705
5TXCC009AS3+TSTAT	A952V080CU5SB	15.5	12.0	7.8	22,200	215575714
5TXCC009AS3+TSTAT	A952V080CU5SB	15.5	12.0	7.8	22,200	215575715
5TXCC009AS3+TSTAT	A952V100CU5SB	15.5	12.0	7.8	22,200	218363851
5TXCC009AS3+TSTAT	A952V100CU5SB	15.5	12.0	7.8	22,200	218363850
5TXCC007AS3+TSTAT	A952V100CU5SB	15.2	11.7	8.1	22,600	214296636
5TXCC007AS3+TSTAT	A952V100CU5SB	15.2	11.7	8.1	22,600	214296637
5TXCC007AS3+TSTAT	A951X100CU5SA	15.2	11.7	8.1	22,400	214296652
5TXCC007AS3+TSTAT	A951X100CU5SA	15.2	11.7	8.1	22,400	214296653
5TXCC007AS3+TSTAT	A952V080CU5SA	15.2	11.7	8.1	22,600	214296654
5TXCC007AS3+TSTAT	A952V080CU5SA	15.2	11.7	8.1	22,600	214296655

Yearly running cost in 10 large cities$1,291-$3,373

Phoenix, AZ$1,581/yr
Miami, FL$1,291/yr
Houston, TX$1,416/yr
Atlanta, GA$1,419/yr
Los Angeles, CA$1,377/yr
New York, NY$3,373/yr
Chicago, IL$2,735/yr
Denver, CO$2,271/yr
Seattle, WA$1,393/yr
Minneapolis, MN$2,809/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 Ameristar A5HP5048A1?: The Ameristar A5HP5048A1 is rated at up to 16.0 SEER2 and 12.0 EER2 for cooling and up to 8.1 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 156 certified matchups SEER2 ranges from 15.2-16.0.
Is the Ameristar A5HP5048A1 good for cold climates?: It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 3.5-ton model.
How much does the Ameristar A5HP5048A1 cost to run per year?: At its rated efficiency it costs about $1,291-$3,373 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,581 in Phoenix and $2,809 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 Ameristar A5HP5048A1?: ENERGY STAR lists 156 certified combinations for this outdoor unit. The highest-rated ones use 5TXCD010AS3+TSTAT, A5AHV006A1D3+TDR+TSTAT, A5AHV007A1D3+TDR+TSTAT.
What refrigerant does the Ameristar A5HP5048A1 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 $1,563/yrYou save $690/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 Ameristar A5HP5048A1

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: $1,563
Current system, per year: $2,252
You save per year: $690
Payback: 23.9 years
Net after 10 years: -$9,602

Cooling $968Heating $595Electricity used: 9,766 kWhSaved vs. a minimum-efficiency heat pump: $163

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 3.5 ton models

American Standard N5HP5048A116.0 SEER2 · 8.1 HSPF2
DuraSTAR DRHP15B42AJ2AN · cold climate16.0 SEER2 · 8.1 HSPF2
American Standard N5HP5042A116.0 SEER2 · 8.1 HSPF2
Friedrich FRP15AY42AJ2N · cold climate16.0 SEER2 · 8.1 HSPF2
American Standard 5HPL5048A1 · cold climate16.0 SEER2 · 8.1 HSPF2
Friedrich FWP15AY42AJ2N · cold climate16.0 SEER2 · 8.1 HSPF2
Trane 5TWX5048A116.0 SEER2 · 8.5 HSPF2
Fujitsu FOP1542TJAYNA · cold climate16.0 SEER2 · 8.1 HSPF2

See all 138 3.5 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of May 1, 2026. How we use the data.