What is the SEER2 rating of the WeatherKing WP14AY42AJ2N?

The WeatherKing WP14AY42AJ2N is rated at up to 15.2 SEER2 and 11.7 EER2 for cooling and up to 7.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.

Is the WeatherKing WP14AY42AJ2N 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 WeatherKing WP14AY42AJ2N cost to run per year?

At its rated efficiency it costs about $1,236-$3,252 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,516 in Phoenix and $2,712 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 WeatherKing WP14AY42AJ2N?

ENERGY STAR lists 28 certified combinations for this outdoor unit. The highest-rated ones use TCFY4824STANM, RCFY4824STANM, FCCN4824SYTA.

3.5-ton central heat pump · VERSUS

WeatherKing WP14AY42AJ2N

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

Ranks #137 of 138 3.5 ton central heat pumps for cooling efficiency, and costs about $1,366 a year to run in a mixed climate like Atlanta.

SEER2: 15.2 Cooling efficiency over a season
Below average · beats 6%
HSPF2: 7.8 Heating efficiency over a season
Below average · beats 5%
EER2: 11.7 Cooling efficiency on a 95°F day
Average · beats 43%
Heat at 5°F: 19,900 BTU/h50% of its 47°F output
Average · beats 58%

A good fit if…

You want a choice of indoor units - 28 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.

Calculate my running cost

Details

Specifications3.5 ton, R-454B

General
Brand	WeatherKing
Also sold as	Ruud, Rheem, Fujitsu
Outdoor unit model	WP14AY42AJ2N
Series	VERSUS
Type	Central heat pump
Nominal size	3.5 ton
CompressorVariable-speed units run longer at low power	Two-stage
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	April 1, 2024
Last certified	August 20, 2026
Cooling
SEER2Seasonal efficiency, higher is better	15.2 (range 15.2)
EER2Efficiency at 95°F outdoors	11.7
Cooling capacity	40,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8
Capacity at 47°F	40,000 BTU/h
Capacity at 17°F	25,400-25,600 BTU/h
Capacity at 5°F	19,900 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.10
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 RCFY4824STANM at the standard test temperatures, in BTU/h:

Certified matchups28 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.
TCFY4824STANM	W801W1255A24DZ	15.2	11.7	7.8	-	214592245
RCFY4824STANM	W801W1255A24DZ	15.2	11.7	7.8	-	214592230
RCFY4824STANM	R801V1255A24DZ	15.2	11.7	7.8	-	214592158
RCFY4824STANM	R801V1255A24DZ	15.2	11.7	7.8	-	214592160
RCFY4824STANM	R802V1255A24DZ	15.2	11.7	7.8	-	214592313
RCFY4824STANM	R921V1155A24M4	15.2	11.7	7.8	-	214592450
RCFY4824STANM	R951V1155A24M4	15.2	11.7	7.8	-	214592451
RCFY4824STANM	R921V1155A24M4	15.2	11.7	7.8	-	214592462
RCFY4824STANM	R951V1155A24M4	15.2	11.7	7.8	-	214592406
TCFY4824STANM	W921W1155A24M4	15.2	11.7	7.8	-	214592427
RCFY4824STANM	W951W1155A24M4	15.2	11.7	7.8	-	214592441
TCFY4824STANM	W951W1155A24M4	15.2	11.7	7.8	-	214592500
RCFY4824STANM	R802V1255A24DZ	15.2	11.7	7.8	-	214592349
TCFY4824STANM	W802W1255A24DZ	15.2	11.7	7.8	-	214592354
RCFY4824STANM	W802W1255A24DZ	15.2	11.7	7.8	-	214592362
RCFY4824STANM	W921W1155A24M4	15.2	11.7	7.8	-	214592371
FCCN4824SYTA	FF80SV512524DZ	15.2	11.7	7.8	-	214604175
FCCN4824SYTA	FF80TV512524DZ	15.2	11.7	7.8	-	214604176
FCCN4824SYTA	FF92SV511524M4	15.2	11.7	7.8	-	214604177
FCCN4824SYTA	FF95SV511524M4	15.2	11.7	7.8	-	214604178
RCFY4824STANM	W962W1155A24M4	15.2	11.7	7.8	-	216574686
RCFY4824STANM	R962V1155A24M4	15.2	11.7	7.8	-	216574687
RCFY4824STANM	R962V1155A24M4	15.2	11.7	7.8	-	216574688
TCFY4824STANM	W962W1155A24M4	15.2	11.7	7.8	-	216574691
RCFY4824STANM	R972V1155A24UPS	15.2	11.7	7.8	19,900	218696154
RCFY4824STANM	R972V1155A24UPS	15.2	11.7	7.8	19,900	218696153
TCFY4824STANM	W972W1155A24UPS	15.2	11.7	7.8	19,900	218696634
RCFY4824STANM	W972W1155A24UPS	15.2	11.7	7.8	19,900	218696633

Yearly running cost in 10 large cities$1,236-$3,252

Phoenix, AZ$1,516/yr
Miami, FL$1,236/yr
Houston, TX$1,359/yr
Atlanta, GA$1,366/yr
Los Angeles, CA$1,327/yr
New York, NY$3,252/yr
Chicago, IL$2,638/yr
Denver, CO$2,192/yr
Seattle, WA$1,345/yr
Minneapolis, MN$2,712/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 WeatherKing WP14AY42AJ2N?: The WeatherKing WP14AY42AJ2N is rated at up to 15.2 SEER2 and 11.7 EER2 for cooling and up to 7.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
Is the WeatherKing WP14AY42AJ2N 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 WeatherKing WP14AY42AJ2N cost to run per year?: At its rated efficiency it costs about $1,236-$3,252 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,516 in Phoenix and $2,712 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 WeatherKing WP14AY42AJ2N?: ENERGY STAR lists 28 certified combinations for this outdoor unit. The highest-rated ones use TCFY4824STANM, RCFY4824STANM, FCCN4824SYTA.
What refrigerant does the WeatherKing WP14AY42AJ2N 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 $1,501/yrYou save $562/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 WeatherKing WP14AY42AJ2N

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: $1,501
Current system, per year: $2,063
You save per year: $562
Payback: 26.7 years
Net after 10 years: -$9,382

Cooling $926Heating $574Electricity used: 9,379 kWhSaved vs. a minimum-efficiency heat pump: $81

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

Rheem RP14AY42AJ2N15.2 SEER2 · 7.8 HSPF2
Whirlpool WLP15AY42AJ2N15.2 SEER2 · 7.8 HSPF2
OXBOX J5HP5048A1000AA15.2 SEER2 · 7.8 HSPF2
OXBOX J5HP5042A1000AA15.2 SEER2 · 7.8 HSPF2
Midea MOVC-42HN10-M152L15.2 SEER2 · 7.8 HSPF2
Midea MOVA-48HN10-M152L15.2 SEER2 · 7.8 HSPF2
Midea MOVA-42HN10-M152L15.2 SEER2 · 7.8 HSPF2
Fujitsu FOP1442TJAYNA15.2 SEER2 · 7.8 HSPF2

See all 138 3.5 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of August 20, 2026. How we use the data.