What is the SEER2 rating of the Thermal Zone TZP15AZ24AJ2N?

The Thermal Zone TZP15AZ24AJ2N 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 Thermal Zone TZP15AZ24AJ2N good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 12,600 BTU/h at 5°F with a COP of 2.20, so it is still 2.2 times as efficient as electric resistance heat at that temperature.

How much does the Thermal Zone TZP15AZ24AJ2N cost to run per year?

At its rated efficiency it costs about $704-$1,798 a year in electricity in large U.S. cities, depending on climate and local rates - for example $856 in Phoenix and $1,494 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 Thermal Zone TZP15AZ24AJ2N?

ENERGY STAR lists 6 certified combinations for this outdoor unit. The highest-rated ones use TCFZ2417STANM, TZHDLTST2417*NAN.

What refrigerant does the Thermal Zone TZP15AZ24AJ2N 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.

2-ton central heat pump · Series

Thermal Zone TZP15AZ24AJ2N

Below average cooling and heating efficiency for a 2-ton central heat pump, and certified for cold climates.

Ranks #315 of 331 2 ton central heat pumps for cooling efficiency, and costs about $760 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: 12,600 BTU/h55% of its 47°F output
Very good · beats 76%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 12,600 BTU/h at 5°F.

Think twice if…

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

Specifications2 ton, R-410A

General
Brand	Thermal Zone
Outdoor unit model	TZP15AZ24AJ2N
Series	Series
Type	Central heat pump
Nominal size	2 ton
CompressorVariable-speed units run longer at low power	Two-stage
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	March 2, 2023
Last certified	June 3, 2026
Cooling
SEER2Seasonal efficiency, higher is better	15.2 (range 15.2)
EER2Efficiency at 95°F outdoors	11.7
Cooling capacity	22,800 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8-8.1
Capacity at 47°F	22,600-22,800 BTU/h
Capacity at 17°F	15,600-15,900 BTU/h
Capacity at 5°F	11,800-12,600 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.20
ENERGY STAR cold climate	Yes

Heating output as it gets colder55% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with TCFZ2417STANM at the standard test temperatures, in BTU/h:

Certified matchups6 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.
TCFZ2417STANM · cold climate	TZ96M42V060B3SA	15.2	11.7	8.1	12,600	212508077
TCFZ2417STANM · cold climate	TZ95M41V060B3SA	15.2	11.7	8.1	12,600	212508060
TCFZ2417STANM · cold climate	TZ95M41V040B3SA	15.2	11.7	8.1	12,600	212508057
TCFZ2417STANM · cold climate	TZ96M42V070B3SA	15.2	11.7	8.1	12,500	212508076
TCFZ2417STANM · cold climate	TZ96M42V040B3SA	15.2	11.7	8.1	12,600	212508075
TZHDLTST2417*NAN	-	15.2	11.7	7.8	11,800	211641694

Yearly running cost in 10 large cities$704-$1,798

Phoenix, AZ$856/yr
Miami, FL$704/yr
Houston, TX$767/yr
Atlanta, GA$760/yr
Los Angeles, CA$737/yr
New York, NY$1,798/yr
Chicago, IL$1,457/yr
Denver, CO$1,208/yr
Seattle, WA$740/yr
Minneapolis, MN$1,494/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 Thermal Zone TZP15AZ24AJ2N?: The Thermal Zone TZP15AZ24AJ2N 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 Thermal Zone TZP15AZ24AJ2N good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 12,600 BTU/h at 5°F with a COP of 2.20, so it is still 2.2 times as efficient as electric resistance heat at that temperature.
How much does the Thermal Zone TZP15AZ24AJ2N cost to run per year?: At its rated efficiency it costs about $704-$1,798 a year in electricity in large U.S. cities, depending on climate and local rates - for example $856 in Phoenix and $1,494 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 Thermal Zone TZP15AZ24AJ2N?: ENERGY STAR lists 6 certified combinations for this outdoor unit. The highest-rated ones use TCFZ2417STANM, TZHDLTST2417*NAN.
What refrigerant does the Thermal Zone TZP15AZ24AJ2N 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 $843/yrYou save $332/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 Thermal Zone TZP15AZ24AJ2N

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: $843
Current system, per year: $1,176
You save per year: $332
Payback: 25.6 years
Net after 10 years: -$5,176

Cooling $528Heating $315Electricity used: 5,270 kWhSaved vs. a minimum-efficiency heat pump: $58

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 2 ton models

Mainline MPP15AZ24AJ2N · cold climate15.2 SEER2 · 8.1 HSPF2
AC Pro SPHP-M-1024BB15.2 SEER2 · 7.8 HSPF2
TCL THH24HAI2NAF2U23 · cold climate15.2 SEER2 · 8.5 HSPF2
Bryant 225SAN024**AA15.2 SEER2 · 7.8 HSPF2
Ameristar E4HL5024A1000A · cold climate15.2 SEER2 · 8.5 HSPF2
Daikin DH5SEA2410A15.2 SEER2 · 7.8 HSPF2
Innovair MHD-24 · cold climate15.2 SEER2 · 9.8 HSPF2
Day & Night N4H5S24*K*AAA15.2 SEER2 · 7.8 HSPF2

See all 331 2 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of June 3, 2026. How we use the data.