What is the SEER2 rating of the Ruud WP15AZ36AJ2N?

The Ruud WP15AZ36AJ2N is rated at up to 15.2 SEER2 and 11.7 EER2 for cooling and up to 8.1 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.

Is the Ruud WP15AZ36AJ2N 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-ton model.

How much does the Ruud WP15AZ36AJ2N cost to run per year?

At its rated efficiency it costs about $1,055-$2,698 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,284 in Phoenix and $2,241 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 Ruud WP15AZ36AJ2N?

ENERGY STAR lists 14 certified combinations for this outdoor unit. The highest-rated ones use RCFZ3621STANM, RH2VZ3621STANN, FHRNTT3617S*ZTNA.

What refrigerant does the Ruud WP15AZ36AJ2N use?

It uses R-410A. R-410A is being phased down under the EPA AIM Act, and new systems are moving to R-454B and R-32.

3-ton central heat pump · W Series

Ruud WP15AZ36AJ2N

Below average cooling and heating efficiency for a 3-ton central heat pump, but not rated for cold climates.

Ranks #283 of 302 3 ton central heat pumps for cooling efficiency, and costs about $1,141 a year to run in a mixed climate like Atlanta.

SEER2: 15.2 Cooling efficiency over a season
Below average · beats 6%
HSPF2: 8.1 Heating efficiency over a season
Below average · beats 20%
EER2: 11.7 Cooling efficiency on a 95°F day
Average · beats 43%
Heat at 5°F: 19,600 BTU/h57% of its 47°F output
Very good · beats 88%

A good fit if…

You want a choice of indoor units - 14 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.
You want the newest refrigerant - it uses R-410A, which is being phased down.

Calculate my running cost

Details

Specifications3 ton, R-410A

General
Brand	Ruud
Also sold as	Rheem, WeatherKing, Fujitsu
Outdoor unit model	WP15AZ36AJ2N
Series	W Series
Type	Central heat pump
Nominal size	3 ton
CompressorVariable-speed units run longer at low power	Two-stage
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	February 24, 2023
Last certified	July 7, 2026
Cooling
SEER2Seasonal efficiency, higher is better	15.2 (range 15.2)
EER2Efficiency at 95°F outdoors	11.7
Cooling capacity	34,200 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8-8.1
Capacity at 47°F	31,600-34,200 BTU/h
Capacity at 17°F	22,400-24,600 BTU/h
Capacity at 5°F	17,500-19,600 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 colder57% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with RCFZ3621STANM at the standard test temperatures, in BTU/h:

Certified matchups14 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.
RCFZ3621STANM	R802V1005A21UHS	15.2	11.7	8.1	19,600	213366317
RH2VZ3621STANN	-	15.2	11.7	8.1	19,300	214384691
RH2VZ3621STANN	-	15.2	11.7	8.1	19,300	214384692
FHRNTT3617S*ZTNA	-	15.2	11.7	7.8	17,500	211641686
RH2TZ3617STANN	-	15.2	11.7	7.8	19,400	211627510
WH2TZ3617STANN	-	15.2	11.7	7.8	17,500	211627511
RH2TZ3617STANN	-	15.2	11.7	7.8	19,400	211627509
WH2TZ3617STANN	-	15.2	11.7	7.8	17,500	213318039
WH2TZ3617STANN	-	15.2	11.7	7.8	17,500	213318049
RF2TZ3624STANS	-	15.2	11.7	7.8	17,800	212403984
RF2TZ3624STANS	-	15.2	11.7	7.8	17,800	212403986
RF2TZ3624STANS	-	15.2	11.7	7.8	17,800	212403988
WH3VZ3617STANN	-	15.2	11.7	7.8	17,500	214779286
WH3VZ3617STANN	-	15.2	11.7	7.8	17,500	214779513

Yearly running cost in 10 large cities$1,055-$2,698

Phoenix, AZ$1,284/yr
Miami, FL$1,055/yr
Houston, TX$1,150/yr
Atlanta, GA$1,141/yr
Los Angeles, CA$1,105/yr
New York, NY$2,698/yr
Chicago, IL$2,185/yr
Denver, CO$1,812/yr
Seattle, WA$1,110/yr
Minneapolis, MN$2,241/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 Ruud WP15AZ36AJ2N?: The Ruud WP15AZ36AJ2N is rated at up to 15.2 SEER2 and 11.7 EER2 for cooling and up to 8.1 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
Is the Ruud WP15AZ36AJ2N 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-ton model.
How much does the Ruud WP15AZ36AJ2N cost to run per year?: At its rated efficiency it costs about $1,055-$2,698 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,284 in Phoenix and $2,241 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 Ruud WP15AZ36AJ2N?: ENERGY STAR lists 14 certified combinations for this outdoor unit. The highest-rated ones use RCFZ3621STANM, RH2VZ3621STANN, FHRNTT3617S*ZTNA.
What refrigerant does the Ruud WP15AZ36AJ2N use?: It uses R-410A. R-410A is being phased down under the EPA AIM Act, and new systems are moving to R-454B and R-32.

Running cost and savings

Pre-filled with this model. Pick your city and what you heat with today; everything else is optional.

Heat pump $1,265/yrYou save $499/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 Ruud WP15AZ36AJ2N

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: $1,265
Current system, per year: $1,763
You save per year: $499
Payback: 26.1 years
Net after 10 years: -$8,015

Cooling $792Heating $473Electricity used: 7,906 kWhSaved vs. a minimum-efficiency heat pump: $88

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 ton models

Sure SP15AZ36AJ2N · cold climate15.2 SEER2 · 8.1 HSPF2
Rheem RP15AZ36AJ2N · cold climate15.2 SEER2 · 8.1 HSPF2
AC Pro SPHP-M-1036BB15.2 SEER2 · 7.8 HSPF2
NORTEK GLOBAL HVAC LLC SH3BF4M2SX36K15.2 SEER2 · 8.1 HSPF2
Arcoaire H4H5S36*K*AAA15.2 SEER2 · 7.8 HSPF2
Fujitsu FOP1536TJAZNA · cold climate15.2 SEER2 · 8.1 HSPF2
Broan FSH3BF4M2SX36K15.2 SEER2 · 7.8 HSPF2
Friedrich FWP15AZ36AJ2N15.2 SEER2 · 8.1 HSPF2

See all 302 3 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of July 7, 2026. How we use the data.