What is the SEER2 rating of the Century A-ZHP15SA-1?

The Century A-ZHP15SA-1 is rated at up to 27.0 SEER2 and 13.0 EER2 for cooling and up to 11.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.

Is the Century A-ZHP15SA-1 good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 13,500 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.

How much does the Century A-ZHP15SA-1 cost to run per year?

At its rated efficiency it costs about $263-$830 a year in electricity in large U.S. cities, depending on climate and local rates - for example $342 in Phoenix and $707 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 Century A-ZHP15SA-1?

ENERGY STAR lists 2 certified combinations for this outdoor unit. The highest-rated ones use CENTURY B-ZHP15SA-1, Comfort Aire B-ZHP15SA-1.

15,000 BTU mini-split heat pump · A-ZHP Series

Century A-ZHP15SA-1

Excellent cooling efficiency and very good heating efficiency for a 15,000 BTU mini-split heat pump, and certified for cold climates.

Ranks #3 of 62 15,000 BTU mini-splits for cooling efficiency, and costs about $335 a year to run in a mixed climate like Atlanta.

SEER2: 27.0 Cooling efficiency over a season
Excellent · beats 94%
HSPF2: 11.0 Heating efficiency over a season
Very good · beats 75%
EER2: 13.0 Cooling efficiency on a 95°F day
Average · beats 62%
Heat at 5°F: 13,500 BTU/h90% of its 47°F output
Average · beats 48%

A good fit if…

You want low cooling bills - its SEER2 beats 94% of mini-splits.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 13,500 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 75% of mini-splits.
You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

Nothing stands out - its ratings have no weak spot for its class.

Calculate my running cost

Details

Specifications15,000 BTU, R-454B

General
Brand	Century
Also sold as	Comfort-Aire
Outdoor unit model	A-ZHP15SA-1
Series	A-ZHP Series
Type	Mini-split heat pump
Nominal size	15,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	April 15, 2026
Last certified	May 6, 2026
Cooling
SEER2Seasonal efficiency, higher is better	27.0 (range 27.0)
EER2Efficiency at 95°F outdoors	13.0
Cooling capacity	15,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	11.0
Capacity at 47°F	15,000 BTU/h
Capacity at 17°F	11,000 BTU/h
Capacity at 5°F	13,500 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.00
ENERGY STAR cold climate	Yes

Heating output as it gets colder90% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with B-ZHP15SA-1 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.
B-ZHP15SA-1 CENTURY · cold climate	27.0	13.0	11.0	13,500	218404563
B-ZHP15SA-1 Comfort Aire · cold climate	27.0	13.0	11.0	13,500	218404560

Yearly running cost in 10 large cities$263-$830

Phoenix, AZ$342/yr
Miami, FL$263/yr
Houston, TX$307/yr
Atlanta, GA$335/yr
Los Angeles, CA$331/yr
New York, NY$830/yr
Chicago, IL$680/yr
Denver, CO$570/yr
Seattle, WA$354/yr
Minneapolis, MN$707/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 Century A-ZHP15SA-1?: The Century A-ZHP15SA-1 is rated at up to 27.0 SEER2 and 13.0 EER2 for cooling and up to 11.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
Is the Century A-ZHP15SA-1 good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 13,500 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
How much does the Century A-ZHP15SA-1 cost to run per year?: At its rated efficiency it costs about $263-$830 a year in electricity in large U.S. cities, depending on climate and local rates - for example $342 in Phoenix and $707 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 Century A-ZHP15SA-1?: ENERGY STAR lists 2 certified combinations for this outdoor unit. The highest-rated ones use CENTURY B-ZHP15SA-1, Comfort Aire B-ZHP15SA-1.
What refrigerant does the Century A-ZHP15SA-1 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 $348/yrYou save $425/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 Century A-ZHP15SA-1

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: $348
Current system, per year: $773
You save per year: $425
Payback: 12.9 years
Net after 10 years: -$1,248

Cooling $196Heating $153Electricity used: 2,177 kWhSaved vs. a minimum-efficiency heat pump: $245

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 15,000 BTU models

Fujitsu AOUH15KZAH1 · cold climate27.5 SEER2 · 12.7 HSPF2
MDV MOX430-15HFN10-M1H · cold climate27.0 SEER2 · 11.0 HSPF2
Fujitsu AOUH15KTAP1 · cold climate28.7 SEER2 · 13.0 HSPF2
Mitsubishi Electric MUZ-FX15NLHZ · cold climate25.9 SEER2 · 11.0 HSPF2
Hisense AO-15U3T25P · cold climate25.6 SEER2 · 11.1 HSPF2
Hisense AS-15UW3TBW00 · cold climate25.6 SEER2 · 11.1 HSPF2
Fujitsu AOUG15LZAS1 · cold climate25.3 SEER2 · 12.8 HSPF2
Fujitsu AOUG15LZAH1 · cold climate25.3 SEER2 · 12.7 HSPF2

See all 62 15,000 BTU mini-splits, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of May 6, 2026. How we use the data.