What is the SEER2 rating of the Hitachi RAS-1.5PNNBDH1?

The Hitachi RAS-1.5PNNBDH1 is rated at up to 21.5 SEER2 and 13.1 EER2 for cooling and up to 9.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 2 certified matchups SEER2 ranges from 20.5-21.5.

Is the Hitachi RAS-1.5PNNBDH1 good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 8,500 BTU/h at 5°F with a COP of 2.30, so it is still 2.3 times as efficient as electric resistance heat at that temperature.

How much does the Hitachi RAS-1.5PNNBDH1 cost to run per year?

At its rated efficiency it costs about $263-$779 a year in electricity in large U.S. cities, depending on climate and local rates - for example $335 in Phoenix and $659 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 Hitachi RAS-1.5PNNBDH1?

ENERGY STAR lists 2 certified combinations for this outdoor unit. The highest-rated ones use HITACHI RPK-1.5PNN1DH, HITACHI RCIM-1.5PNN1DH.

What refrigerant does the Hitachi RAS-1.5PNNBDH1 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.

12,000 BTU mini-split heat pump · Hi UNI

Hitachi RAS-1.5PNNBDH1

Below average cooling and heating efficiency for a 12,000 BTU mini-split heat pump, and certified for cold climates.

Ranks #320 of 394 12,000 BTU mini-splits for cooling efficiency, and costs about $319 a year to run in a mixed climate like Atlanta.

SEER2: 21.5 Cooling efficiency over a season
Below average · beats 39%
HSPF2: 9.5 Heating efficiency over a season
Below average · beats 24%
EER2: 13.1 Cooling efficiency on a 95°F day
Average · beats 68%
Heat at 5°F: 8,500 BTU/h71% of its 47°F output
Very good · beats 86%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 8,500 BTU/h at 5°F.
You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

Cooling cost matters most - its SEER2 is below average for mini-splits.
You mainly need heat - its HSPF2 is below average for mini-splits.
You want the newest refrigerant - it uses R-410A, which is being phased down.

Calculate my running cost

Details

Specifications12,000 BTU, R-410A

General
Brand	Hitachi
Outdoor unit model	RAS-1.5PNNBDH1
Series	Hi UNI
Type	Mini-split heat pump
Nominal size	12,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	March 3, 2023
Last certified	June 9, 2026
Cooling
SEER2Seasonal efficiency, higher is better	21.5 (range 20.5-21.5)
EER2Efficiency at 95°F outdoors	12.5-13.1
Cooling capacity	12,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	9.0-9.5
Capacity at 47°F	12,000 BTU/h
Capacity at 17°F	7,600-8,000 BTU/h
Capacity at 5°F	8,500 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.88-2.30
ENERGY STAR cold climate	Yes

Heating output as it gets colder71% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with RPK-1.5PNN1DH 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.
RPK-1.5PNN1DH HITACHI · cold climate	21.5	13.1	9.0	8,500	207656961
RCIM-1.5PNN1DH HITACHI · cold climate	20.5	12.5	9.5	8,500	206750853

Yearly running cost in 10 large cities$263-$779

Phoenix, AZ$335/yr
Miami, FL$263/yr
Houston, TX$301/yr
Atlanta, GA$319/yr
Los Angeles, CA$313/yr
New York, NY$779/yr
Chicago, IL$636/yr
Denver, CO$532/yr
Seattle, WA$329/yr
Minneapolis, MN$659/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 Hitachi RAS-1.5PNNBDH1?: The Hitachi RAS-1.5PNNBDH1 is rated at up to 21.5 SEER2 and 13.1 EER2 for cooling and up to 9.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 2 certified matchups SEER2 ranges from 20.5-21.5.
Is the Hitachi RAS-1.5PNNBDH1 good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 8,500 BTU/h at 5°F with a COP of 2.30, so it is still 2.3 times as efficient as electric resistance heat at that temperature.
How much does the Hitachi RAS-1.5PNNBDH1 cost to run per year?: At its rated efficiency it costs about $263-$779 a year in electricity in large U.S. cities, depending on climate and local rates - for example $335 in Phoenix and $659 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 Hitachi RAS-1.5PNNBDH1?: ENERGY STAR lists 2 certified combinations for this outdoor unit. The highest-rated ones use HITACHI RPK-1.5PNN1DH, HITACHI RCIM-1.5PNN1DH.
What refrigerant does the Hitachi RAS-1.5PNNBDH1 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 $338/yrYou save $281/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 Hitachi RAS-1.5PNNBDH1

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: $338
Current system, per year: $619
You save per year: $281
Payback: 16.0 years
Net after 10 years: -$1,692

Cooling $196Heating $141Electricity used: 2,112 kWhSaved vs. a minimum-efficiency heat pump: $137

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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See all 394 12,000 BTU mini-splits, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of June 9, 2026. How we use the data.