What is the SEER2 rating of the Kepler AZPN/45WD?

The Kepler AZPN/45WD is rated at up to 15.2 SEER2 and 10.0 EER2 for cooling and up to 9.2 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.

Is the Kepler AZPN/45WD good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 46,500 BTU/h at 5°F with a COP of 1.80, so it is still 1.8 times as efficient as electric resistance heat at that temperature.

How much does the Kepler AZPN/45WD cost to run per year?

At its rated efficiency it costs about $1,392-$3,765 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,722 in Phoenix and $3,151 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 Kepler AZPN/45WD?

ENERGY STAR lists 2 certified combinations for this outdoor unit. The highest-rated ones use AZPN/D60WAC-UC, AZPN/D60WAC.

What refrigerant does the Kepler AZPN/45WD 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.

3.5-ton central heat pump · AZPN Series

Kepler AZPN/45WD

Below average cooling efficiency and average heating efficiency for a 3.5-ton central heat pump, and certified for cold climates.

Ranks #112 of 138 3.5 ton central heat pumps for cooling efficiency, and costs about $1,571 a year to run in a mixed climate like Atlanta.

SEER2: 15.2 Cooling efficiency over a season
Below average · beats 6%
HSPF2: 9.2 Heating efficiency over a season
Average · beats 61%
EER2: 10.0 Cooling efficiency on a 95°F day
Below average · beats 10%
Heat at 5°F: 46,500 BTU/h85% of its 47°F output
Below average · beats 5%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 46,500 BTU/h at 5°F.
You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

Cooling cost matters most - its SEER2 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

Specifications3.5 ton, R-410A

General
Brand	Kepler
Outdoor unit model	AZPN/45WD
Series	AZPN Series
Type	Central heat pump
Nominal size	3.5 ton
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	May 20, 2024
Last certified	April 22, 2026
Cooling
SEER2Seasonal efficiency, higher is better	15.2 (range 15.2)
EER2Efficiency at 95°F outdoors	10.0
Cooling capacity	45,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	9.2
Capacity at 47°F	55,000 BTU/h
Capacity at 17°F	37,000 BTU/h
Capacity at 5°F	46,500 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.80
ENERGY STAR cold climate	Yes

Heating output as it gets colder85% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with AZPN/D60WAC-UC at the standard test temperatures, in BTU/h:

Certified matchups2 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.
AZPN/D60WAC-UC · cold climate	15.2	10.0	9.2	46,500	214610384
AZPN/D60WAC · cold climate	15.2	10.0	9.2	46,500	214568859

Yearly running cost in 10 large cities$1,392-$3,765

Phoenix, AZ$1,722/yr
Miami, FL$1,392/yr
Houston, TX$1,544/yr
Atlanta, GA$1,571/yr
Los Angeles, CA$1,531/yr
New York, NY$3,765/yr
Chicago, IL$3,059/yr
Denver, CO$2,545/yr
Seattle, WA$1,565/yr
Minneapolis, MN$3,151/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 Kepler AZPN/45WD?: The Kepler AZPN/45WD is rated at up to 15.2 SEER2 and 10.0 EER2 for cooling and up to 9.2 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
Is the Kepler AZPN/45WD good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 46,500 BTU/h at 5°F with a COP of 1.80, so it is still 1.8 times as efficient as electric resistance heat at that temperature.
How much does the Kepler AZPN/45WD cost to run per year?: At its rated efficiency it costs about $1,392-$3,765 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,722 in Phoenix and $3,151 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 Kepler AZPN/45WD?: ENERGY STAR lists 2 certified combinations for this outdoor unit. The highest-rated ones use AZPN/D60WAC-UC, AZPN/D60WAC.
What refrigerant does the Kepler AZPN/45WD 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 $1,712/yrYou save $772/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 Kepler AZPN/45WD

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: $1,712
Current system, per year: $2,484
You save per year: $772
Payback: 22.0 years
Net after 10 years: -$9,277

Cooling $1,042Heating $670Electricity used: 10,698 kWhSaved vs. a minimum-efficiency heat pump: $217

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.

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Continental WSCHV0048BA1-C · cold climate15.2 SEER2 · 9.0 HSPF2
Kenmore B5H6S42*K*AAA15.5 SEER2 · 7.8 HSPF2
KERR A-KXP48TA-1 · cold climate15.2 SEER2 · 8.8 HSPF2
Heil N5H5S42*K*AAA15.5 SEER2 · 7.8 HSPF2
TCL THH42HAI2NAF2U23 · cold climate15.2 SEER2 · 8.5 HSPF2

See all 138 3.5 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of April 22, 2026. How we use the data.