What is the SEER2 rating of the Mainline MPP15AZ18AJ2N?

The Mainline MPP15AZ18AJ2N 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 Mainline MPP15AZ18AJ2N good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 9,500 BTU/h at 5°F with a COP of 2.10, so it is still 2.1 times as efficient as electric resistance heat at that temperature.

How much does the Mainline MPP15AZ18AJ2N cost to run per year?

At its rated efficiency it costs about $528-$1,349 a year in electricity in large U.S. cities, depending on climate and local rates - for example $642 in Phoenix and $1,120 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 Mainline MPP15AZ18AJ2N?

ENERGY STAR lists 7 certified combinations for this outdoor unit. The highest-rated ones use TCFZ2417STANM, MPH2CZ2417STANN.

What refrigerant does the Mainline MPP15AZ18AJ2N 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.

1.5-ton central heat pump · Performance

Mainline MPP15AZ18AJ2N

Below average cooling and heating efficiency for a 1.5-ton central heat pump, and certified for cold climates.

Ranks #153 of 170 1.5 ton central heat pumps for cooling efficiency, and costs about $570 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: 9,500 BTU/h54% of its 47°F output
Average · beats 58%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 9,500 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

Specifications1.5 ton, R-410A

General
Brand	Mainline
Outdoor unit model	MPP15AZ18AJ2N
Series	Performance
Type	Central heat pump
Nominal size	1.5 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	July 7, 2026
Cooling
SEER2Seasonal efficiency, higher is better	15.2 (range 15.2)
EER2Efficiency at 95°F outdoors	11.7
Cooling capacity	17,100 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8-8.1
Capacity at 47°F	17,100 BTU/h
Capacity at 17°F	11,600-12,100 BTU/h
Capacity at 5°F	9,200-9,500 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.10
ENERGY STAR cold climate	Yes

Heating output as it gets colder54% 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 matchups7 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	MP962W0703A17M4S	15.2	11.7	8.1	9,300	212507930
MPH2CZ2417STANN	-	15.2	11.7	7.8	9,200	211641667
TCFZ2417STANM	MP951W0603A17M4S	15.2	11.7	7.8	9,400	212507910
TCFZ2417STANM	MP962W0603A17M4S	15.2	11.7	7.8	9,400	212507929
TCFZ2417STANM	MP962W0403A17M4S	15.2	11.7	7.8	9,300	212507928
TCFZ2417STANM	MP951W0403A17UHU	15.2	11.7	7.8	9,500	212507913
TCFZ2417STANM	MP951W0403A17M4S	15.2	11.7	7.8	9,300	212507914

Yearly running cost in 10 large cities$528-$1,349

Phoenix, AZ$642/yr
Miami, FL$528/yr
Houston, TX$575/yr
Atlanta, GA$570/yr
Los Angeles, CA$552/yr
New York, NY$1,349/yr
Chicago, IL$1,092/yr
Denver, CO$906/yr
Seattle, WA$555/yr
Minneapolis, MN$1,120/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 Mainline MPP15AZ18AJ2N?: The Mainline MPP15AZ18AJ2N 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 Mainline MPP15AZ18AJ2N good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 9,500 BTU/h at 5°F with a COP of 2.10, so it is still 2.1 times as efficient as electric resistance heat at that temperature.
How much does the Mainline MPP15AZ18AJ2N cost to run per year?: At its rated efficiency it costs about $528-$1,349 a year in electricity in large U.S. cities, depending on climate and local rates - for example $642 in Phoenix and $1,120 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 Mainline MPP15AZ18AJ2N?: ENERGY STAR lists 7 certified combinations for this outdoor unit. The highest-rated ones use TCFZ2417STANM, MPH2CZ2417STANN.
What refrigerant does the Mainline MPP15AZ18AJ2N 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 $632/yrYou save $249/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 Mainline MPP15AZ18AJ2N

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: $632
Current system, per year: $882
You save per year: $249
Payback: 26.1 years
Net after 10 years: -$4,007

Cooling $396Heating $236Electricity used: 3,953 kWhSaved vs. a minimum-efficiency heat pump: $44

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 1.5 ton models

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RunTru A5HP5018A115.2 SEER2 · 8.1 HSPF2
TCL THH18HAI2NAF2U23 · cold climate15.2 SEER2 · 8.5 HSPF2
Thermal Zone TZP15AZ18AJ2N · cold climate15.2 SEER2 · 8.1 HSPF2
Ameristar E4HL5018A1000A · cold climate15.2 SEER2 · 8.5 HSPF2
American Standard N5HP5018A115.2 SEER2 · 8.0 HSPF2
DETTSON MHD-18 · cold climate15.2 SEER2 · 9.5 HSPF2

See all 170 1.5 ton central heat pumps, ranked

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