What is the SEER2 rating of the American Standard N5HP5042A1?

The American Standard N5HP5042A1 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 144 certified matchups SEER2 ranges from 15.2-16.0.

Is the American Standard N5HP5042A1 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 American Standard N5HP5042A1 cost to run per year?

At its rated efficiency it costs about $1,158-$2,990 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,413 in Phoenix and $2,487 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 American Standard N5HP5042A1?

ENERGY STAR lists 144 certified combinations for this outdoor unit. The highest-rated ones use 5TXCD008AS3+TSTAT, A5AHV006A1D3+TDR+TSTAT, 5TXCD010AS3+TSTAT.

3.5-ton central heat pump · Bronze 15

American Standard N5HP5042A1

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

Ranks #68 of 138 3.5 ton central heat pumps for cooling efficiency, and costs about $1,261 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: 19,900 BTU/h50% of its 47°F output
Very good · beats 85%

A good fit if…

You want a choice of indoor units - 144 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	American Standard
Also sold as	Trane
Outdoor unit model	N5HP5042A1
Series	Bronze 15
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	May 26, 2026
Last certified	June 29, 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	38,000-41,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8-8.1
Capacity at 47°F	37,600-39,000 BTU/h
Capacity at 17°F	25,200-26,200 BTU/h
Capacity at 5°F	19,100-19,900 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.11-2.28
ENERGY STAR cold climate	No

Heating output as it gets colder50% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with 5TXCD008AS3+TSTAT at the standard test temperatures, in BTU/h:

Certified matchups144 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 144 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.
5TXCD008AS3+TSTAT	A951X120DU5SA	16.0	12.0	8.1	19,400	218470734
A5AHV006A1D3+TDR+TSTAT	-	16.0	12.0	8.1	19,400	218470505
5TXCD010AS3+TSTAT	A801X120DM5SD	16.0	12.0	8.1	19,400	218470496
5TXCD010AS3+TSTAT	A952V120DU5SB	16.0	12.0	8.1	19,200	218470494
5TXCD010AS3+TSTAT	A951X120DU5SA	16.0	12.0	8.1	19,300	218470493
5TXCD010AS3+TSTAT+P0V0D000M50SD	-	16.0	12.0	8.1	19,200	218470492
5TXCD008AS3+TSTAT+P0V0D000M50SD	-	16.0	12.0	8.1	19,300	218470491
5TXCD008AS3+TSTAT	A801X120DM5SD	16.0	12.0	8.1	19,500	218470490
5TXCD008AS3+TSTAT	A952V120DU5SB	16.0	12.0	8.1	19,300	218470489
5TXCC009AS3+TSTAT+P0V0C000M50SD	-	16.0	12.0	8.1	19,200	218470482
5TXCC009AS3+TSTAT	L8V1C100U5VSB	16.0	12.0	8.1	19,300	218470481
5TXCC007AS3+TSTAT	A951X100CU5SA	16.0	12.0	8.1	19,400	218470478
5TXCC007AS3+TSTAT	A952V080CU5SB	16.0	12.0	8.1	19,500	218470476
5TXCC007AS3+TSTAT	A801X080CM5SD	16.0	12.0	8.1	19,700	218470475
5TXCC007AS3+TSTAT	A801X100CM5SD	16.0	12.0	8.1	19,500	218470474
5TXCB006AS3+TSTAT+P0V0B000M40SD	-	16.0	12.0	8.1	19,300	218470469
5PX*DD10AS3+TSTAT+P0V0D000M50SD	-	16.0	12.0	8.1	19,200	218470466
5PX*DD10AS3+TSTAT	A801X120DM5SD	16.0	12.0	8.1	19,400	218470465
5PX*DD10AS3+TSTAT	A952V120DD5SB	16.0	12.0	8.1	19,100	218470463
5PX*D010AS3+TSTAT+P0V0D000M50SD	-	16.0	12.0	8.1	19,200	218470460
5PX*D010AS3+TSTAT	A952V120DU5SB	16.0	12.0	8.1	19,200	218470459
5PX*D010AS3+TSTAT	A951X120DU5SA	16.0	12.0	8.1	19,300	218470458
5PX*D010AS3+TSTAT	A801X120DM5SD	16.0	12.0	8.1	19,400	218470457
5PX*D008AS3+TSTAT	A801X120DM5SD	16.0	12.0	8.1	19,500	218470456
5PX*D008AS3+TSTAT	A951X120DU5SA	16.0	12.0	8.1	19,400	218470455
5PX*D008AS3+TSTAT	A952V120DU5SB	16.0	12.0	8.1	19,300	218470454
5PX*D008AS3+TSTAT+P0V0D000M50SD	-	16.0	12.0	8.1	19,300	218470453
5PX*CD09AS3+TSTAT+P0V0C000M50SD	-	16.0	12.0	8.1	19,300	218470452
5PX*CD09AS3+TSTAT	A801X080CM5SD	16.0	12.0	8.1	19,600	218470451
5PX*CD09AS3+TSTAT	A801X100CM5SD	16.0	12.0	8.1	19,700	218470450
5PX*CD09AS3+TSTAT	A952V100CD5SB	16.0	12.0	8.1	19,300	218470448
5PX*C009AS3+TSTAT+P0V0C000M50SD	-	16.0	12.0	8.1	19,200	218470444
5PX*C009AS3+TSTAT	L8V1C100U5VSB	16.0	12.0	8.1	19,300	218470443
5PX*C009AS3+TSTAT	A952V100CU5SB	16.0	12.0	8.1	19,300	218470442
5PX*C009AS3+TSTAT	A952V080CU5SB	16.0	12.0	8.1	19,400	218470441
5PX*C009AS3+TSTAT	A951X100CU5SA	16.0	12.0	8.1	19,500	218470440
5PX*C009AS3+TSTAT	A951X080CU5SA	16.0	12.0	8.1	19,200	218470439
5PX*C009AS3+TSTAT	A801X100CM5SD	16.0	12.0	8.1	19,700	218470438
5PX*C009AS3+TSTAT	A801X080CM5SD	16.0	12.0	8.1	19,600	218470437
5PX*C007AS3+TSTAT	A801X100CM5SD	16.0	12.0	8.1	19,500	218470435
5PX*C007AS3+TSTAT	A801X080CM5SD	16.0	12.0	8.1	19,700	218470434
5PX*C007AS3+TSTAT+P0V0C000M50SD	-	16.0	12.0	8.1	19,400	218470433
5PX*C007AS3+TSTAT	A952V080CU5SB	16.0	12.0	8.1	19,500	218470430
5PX*C007AS3+TSTAT	A951X100CU5SA	16.0	12.0	8.1	19,400	218470429
5PX*B006AS3+TSTAT+P0V0B000M40SD	-	16.0	12.0	8.1	19,300	218470421
A5AHV006A1D3+TDR+TSTAT	-	16.0	12.0	8.1	19,400	218469799
5TXCD010AS3+TSTAT	A801X120DM5SD	16.0	12.0	8.1	19,400	218469790
5TXCD010AS3+TSTAT	A952V120DU5SB	16.0	12.0	8.1	19,200	218469788
5TXCD010AS3+TSTAT	A951X120DU5SA	16.0	12.0	8.1	19,300	218469787
5TXCD010AS3+TSTAT+P0V0D000M50SD	-	16.0	12.0	8.1	19,200	218469786
5TXCD008AS3+TSTAT+P0V0D000M50SD	-	16.0	12.0	8.1	19,300	218469785
5TXCD008AS3+TSTAT	A801X120DM5SD	16.0	12.0	8.1	19,500	218469784
5TXCD008AS3+TSTAT	A951X120DU5SA	16.0	12.0	8.1	19,400	218469783
5TXCD008AS3+TSTAT	A952V120DU5SB	16.0	12.0	8.1	19,300	218469782
5TXCC009AS3+TSTAT+P0V0C000M50SD	-	16.0	12.0	8.1	19,200	218469775
5TXCC009AS3+TSTAT	L8V1C100U5VSB	16.0	12.0	8.1	19,300	218469774
5TXCC007AS3+TSTAT	A951X100CU5SA	16.0	12.0	8.1	19,400	218469771
5TXCC007AS3+TSTAT	A952V080CU5SB	16.0	12.0	8.1	19,500	218469769
5TXCC007AS3+TSTAT	A801X080CM5SD	16.0	12.0	8.1	19,700	218469768
5TXCC007AS3+TSTAT	A801X100CM5SD	16.0	12.0	8.1	19,500	218469767

Yearly running cost in 10 large cities$1,158-$2,990

Phoenix, AZ$1,413/yr
Miami, FL$1,158/yr
Houston, TX$1,266/yr
Atlanta, GA$1,261/yr
Los Angeles, CA$1,223/yr
New York, NY$2,990/yr
Chicago, IL$2,423/yr
Denver, CO$2,010/yr
Seattle, WA$1,232/yr
Minneapolis, MN$2,487/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 American Standard N5HP5042A1?: The American Standard N5HP5042A1 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 144 certified matchups SEER2 ranges from 15.2-16.0.
Is the American Standard N5HP5042A1 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 American Standard N5HP5042A1 cost to run per year?: At its rated efficiency it costs about $1,158-$2,990 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,413 in Phoenix and $2,487 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 American Standard N5HP5042A1?: ENERGY STAR lists 144 certified combinations for this outdoor unit. The highest-rated ones use 5TXCD008AS3+TSTAT, A5AHV006A1D3+TDR+TSTAT, 5TXCD010AS3+TSTAT.
What refrigerant does the American Standard N5HP5042A1 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 $1,394/yrYou save $618/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 American Standard N5HP5042A1

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: $1,394
Current system, per year: $2,012
You save per year: $618
Payback: 24.3 years
Net after 10 years: -$8,823

Cooling $869Heating $525Electricity used: 8,715 kWhSaved vs. a minimum-efficiency heat pump: $145

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

Trane 5TWX5048A116.0 SEER2 · 8.5 HSPF2
Ameristar A5HP5048A116.0 SEER2 · 8.1 HSPF2
Trane 5TWR6048A116.0 SEER2 · 8.5 HSPF2
DuraSTAR DRHP15B42AJ2AN · cold climate16.0 SEER2 · 8.1 HSPF2
Trane 5TWR5048A116.0 SEER2 · 8.5 HSPF2
Friedrich FRP15AY42AJ2N · cold climate16.0 SEER2 · 8.1 HSPF2
Friedrich RD16AY48AJVC · cold climate16.0 SEER2 · 8.5 HSPF2
Friedrich FWP15AY42AJ2N · 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 June 29, 2026. How we use the data.