What is the SEER2 rating of the AUX ASPR42HPMULO?

The AUX ASPR42HPMULO is rated at up to 22.0 SEER2 and 12.0 EER2 for cooling and up to 10.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 3 certified matchups SEER2 ranges from 20.0-22.0.

Is the AUX ASPR42HPMULO good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 32,400 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 AUX ASPR42HPMULO cost to run per year?

At its rated efficiency it costs about $793-$2,294 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,002 in Phoenix and $1,935 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the AUX ASPR42HPMULO the same as the ACIQ ACIQ-42Z-E-M5?

Yes, as far as the certified ratings go. ENERGY STAR lists 4 model numbers with identical efficiency, capacity and matchups, which means the same outdoor unit sold under a different brand or with a minor variant code (voltage, colour or region). The full list is on this page.

36,000 BTU mini-split heat pump · A-Series

AUX ASPR42HPMULO

Average cooling and heating efficiency for a 36,000 BTU mini-split heat pump, and certified for cold climates.

Ranks #86 of 205 36,000 BTU mini-splits for cooling efficiency, and costs about $943 a year to run in a mixed climate like Atlanta.

SEER2: 22.0 Cooling efficiency over a season
Average · beats 48%
HSPF2: 10.0 Heating efficiency over a season
Average · beats 43%
EER2: 12.0 Cooling efficiency on a 95°F day
Below average · beats 25%
Heat at 5°F: 32,400 BTU/h88% of its 47°F output
Average · beats 48%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 32,400 BTU/h at 5°F.
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

Specifications36,000 BTU, R-32

General
Brand	AUX
Also sold as	ACIQ, AUFIT, XTRON
Outdoor unit model	ASPR42HPMULO
Series	A-Series
Type	Mini-split heat pump
Nominal size	36,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-32
Connected (smart) capable	No
On the market since	May 30, 2024
Last certified	June 25, 2026
Cooling
SEER2Seasonal efficiency, higher is better	22.0 (range 20.0-22.0)
EER2Efficiency at 95°F outdoors	11.2-12.0
Cooling capacity	37,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	9.2-10.0
Capacity at 47°F	37,000 BTU/h
Capacity at 17°F	28,000-35,600 BTU/h
Capacity at 5°F	28,000-32,400 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 colder88% kept at 5°F

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

Certified matchups3 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.
- · cold climate	22.0	12.0	10.0	32,400	214291427
- · cold climate	21.0	11.6	9.6	30,200	216050938
- · cold climate	20.0	11.2	9.2	28,000	216032402

Same unit, other model numbers3

These model numbers have exactly the same certified ratings and matchups as the AUX ASPR42HPMULO: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

ACIQ ACIQ-42Z-E-M5
AUFIT FM5-H42/2DR3A
XTRON XM5-H42/2DR3A

Yearly running cost in 10 large cities$793-$2,294

Phoenix, AZ$1,002/yr
Miami, FL$793/yr
Houston, TX$899/yr
Atlanta, GA$943/yr
Los Angeles, CA$925/yr
New York, NY$2,294/yr
Chicago, IL$1,871/yr
Denver, CO$1,561/yr
Seattle, WA$964/yr
Minneapolis, MN$1,935/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 AUX ASPR42HPMULO?: The AUX ASPR42HPMULO is rated at up to 22.0 SEER2 and 12.0 EER2 for cooling and up to 10.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 3 certified matchups SEER2 ranges from 20.0-22.0.
Is the AUX ASPR42HPMULO good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 32,400 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 AUX ASPR42HPMULO cost to run per year?: At its rated efficiency it costs about $793-$2,294 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,002 in Phoenix and $1,935 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the AUX ASPR42HPMULO the same as the ACIQ ACIQ-42Z-E-M5?: Yes, as far as the certified ratings go. ENERGY STAR lists 4 model numbers with identical efficiency, capacity and matchups, which means the same outdoor unit sold under a different brand or with a minor variant code (voltage, colour or region). The full list is on this page.
What refrigerant does the AUX ASPR42HPMULO use?: It uses 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 $1,006/yrYou save $901/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 AUX ASPR42HPMULO

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: $1,006
Current system, per year: $1,908
You save per year: $901
Payback: 15.5 years
Net after 10 years: -$4,986

Cooling $592Heating $414Electricity used: 6,290 kWhSaved vs. a minimum-efficiency heat pump: $457

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 36,000 BTU models

Fujitsu AOUH36KWAH4 · cold climate22.0 SEER2 · 10.0 HSPF2
Panasonic CU-5Z36BBUC · cold climate22.0 SEER2 · 10.3 HSPF2
Fujitsu AOUH36KWAS422.0 SEER2 · 10.0 HSPF2
Samsung AC036DXSCCG · cold climate22.0 SEER2 · 10.6 HSPF2
Hisense AMW4-36U3TQA · cold climate22.0 SEER2 · 10.0 HSPF2
Lennox MMLD036S6S-1P · cold climate22.0 SEER2 · 10.6 HSPF2
OLMO OS-RMS36-230VO · cold climate22.0 SEER2 · 10.0 HSPF2
Fujitsu AOUH36KUAH1 · cold climate22.0 SEER2 · 10.7 HSPF2

See all 205 36,000 BTU mini-splits, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of June 25, 2026. How we use the data.