What is the SEER2 rating of the 1HVAC ACIQ-36Z-HH-M4B?

The 1HVAC ACIQ-36Z-HH-M4B is rated at up to 22.2 SEER2 and 13.6 EER2 for cooling and up to 10.3 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 16 certified matchups SEER2 ranges from 19.0-22.2.

Is the 1HVAC ACIQ-36Z-HH-M4B good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 36,000 BTU/h at 5°F with a COP of 1.90, so it is still 1.9 times as efficient as electric resistance heat at that temperature.

How much does the 1HVAC ACIQ-36Z-HH-M4B cost to run per year?

At its rated efficiency it costs about $765-$2,225 a year in electricity in large U.S. cities, depending on climate and local rates - for example $968 in Phoenix and $1,878 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

What refrigerant does the 1HVAC ACIQ-36Z-HH-M4B 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.

36,000 BTU mini-split heat pump · ACIQ

1HVAC ACIQ-36Z-HH-M4B

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

Ranks #69 of 205 36,000 BTU mini-splits for cooling efficiency, and costs about $913 a year to run in a mixed climate like Atlanta.

SEER2: 22.2 Cooling efficiency over a season
Average · beats 52%
HSPF2: 10.3 Heating efficiency over a season
Average · beats 55%
EER2: 13.6 Cooling efficiency on a 95°F day
Very good · beats 76%
Heat at 5°F: 36,000 BTU/h97% of its 47°F output
Below average · beats 27%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 36,000 BTU/h at 5°F.
You want steady temperatures and quiet running - the compressor varies its speed.
You want a choice of indoor units - 16 certified pairings.

Think twice if…

You want the newest refrigerant - it uses R-410A, which is being phased down.

Calculate my running cost

Details

Specifications36,000 BTU, R-410A

General
Brand	1HVAC
Also sold as	ACIQ, DIYCOOL, PolarWave, STEALTH
Outdoor unit model	ACIQ-36Z-HH-M4B
Series	ACIQ
Type	Mini-split heat pump
Nominal size	36,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	October 1, 2022
Last certified	June 29, 2026
Cooling
SEER2Seasonal efficiency, higher is better	22.2 (range 19.0-22.2)
EER2Efficiency at 95°F outdoors	11.7-13.6
Cooling capacity	36,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	10.0-10.3
Capacity at 47°F	37,000 BTU/h
Capacity at 17°F	33,000-35,000 BTU/h
Capacity at 5°F	33,000-36,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.70-1.90
ENERGY STAR cold climate	Yes

Heating output as it gets colder97% 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 matchups16 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	22.2	13.6	10.3	36,000	207825570
- · cold climate	22.2	13.6	10.3	36,000	207825570
- DIYCOOL · cold climate	22.2	13.6	10.3	36,000	207825594
- ACIQ · cold climate	22.2	13.6	10.3	36,000	207825582
- PolarWave · cold climate	22.2	13.6	10.3	36,000	212316091
- STEALTH · cold climate	22.2	13.6	10.3	36,000	212316177
- PolarWave · cold climate	20.6	12.7	10.2	34,400	212316093
- STEALTH · cold climate	20.6	12.7	10.2	34,400	212316179
- · cold climate	20.6	12.7	10.2	34,400	207825572
- ACIQ · cold climate	20.6	12.7	10.2	34,400	207825584
- DIYCOOL · cold climate	20.6	12.7	10.2	34,400	207825596
- ACIQ	19.0	11.7	10.0	33,000	207825583
-	19.0	11.7	10.0	33,000	207825571
- DIYCOOL	19.0	11.7	10.0	33,000	207825595
- PolarWave	19.0	11.7	10.0	33,000	212316092
- STEALTH	19.0	11.7	10.0	33,000	212316178

Yearly running cost in 10 large cities$765-$2,225

Phoenix, AZ$968/yr
Miami, FL$765/yr
Houston, TX$868/yr
Atlanta, GA$913/yr
Los Angeles, CA$896/yr
New York, NY$2,225/yr
Chicago, IL$1,814/yr
Denver, CO$1,515/yr
Seattle, WA$936/yr
Minneapolis, MN$1,878/yr

At each state's average electricity price and the city's typical heating and cooling hours.

Questions4

What is the SEER2 rating of the 1HVAC ACIQ-36Z-HH-M4B?: The 1HVAC ACIQ-36Z-HH-M4B is rated at up to 22.2 SEER2 and 13.6 EER2 for cooling and up to 10.3 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 16 certified matchups SEER2 ranges from 19.0-22.2.
Is the 1HVAC ACIQ-36Z-HH-M4B good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 36,000 BTU/h at 5°F with a COP of 1.90, so it is still 1.9 times as efficient as electric resistance heat at that temperature.
How much does the 1HVAC ACIQ-36Z-HH-M4B cost to run per year?: At its rated efficiency it costs about $765-$2,225 a year in electricity in large U.S. cities, depending on climate and local rates - for example $968 in Phoenix and $1,878 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
What refrigerant does the 1HVAC ACIQ-36Z-HH-M4B 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 $973/yrYou save $899/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 1HVAC ACIQ-36Z-HH-M4B

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: $973
Current system, per year: $1,873
You save per year: $899
Payback: 15.0 years
Net after 10 years: -$4,505

Cooling $571Heating $402Electricity used: 6,082 kWhSaved vs. a minimum-efficiency heat pump: $466

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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Hitachi HVAHP036C23S22.3 SEER2 · 10.8 HSPF2
Carrier 38MGHBQ36DA3 · cold climate22.2 SEER2 · 10.3 HSPF2
MDV M4OX630-36HFN1-M1X · cold climate22.4 SEER2 · 10.9 HSPF2
Cooper&Hunter CH-HPR36M-230VO · cold climate22.2 SEER2 · 10.3 HSPF2
KERR A-KMH36QV-1A · cold climate22.4 SEER2 · 10.9 HSPF2
EMI MHMZ436DA · cold climate22.2 SEER2 · 10.3 HSPF2

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

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of June 29, 2026. How we use the data.