What is the SEER2 rating of the TRUST AIR CONDITIONERS OAH24H/O6S4P?

The TRUST AIR CONDITIONERS OAH24H/O6S4P is rated at up to 22.3 SEER2 and 12.5 EER2 for cooling and up to 13.3 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 4 certified matchups SEER2 ranges from 19.0-22.3.

Is the TRUST AIR CONDITIONERS OAH24H/O6S4P good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 24,200 BTU/h at 5°F with a COP of 2.23, so it is still 2.2 times as efficient as electric resistance heat at that temperature.

How much does the TRUST AIR CONDITIONERS OAH24H/O6S4P cost to run per year?

At its rated efficiency it costs about $492-$1,251 a year in electricity in large U.S. cities, depending on climate and local rates - for example $598 in Phoenix and $1,038 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the TRUST AIR CONDITIONERS OAH24H/O6S4P the same as the Multi MFG MSH-24HD-B?

Yes, as far as the certified ratings go. ENERGY STAR lists both 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.

Which indoor units work with the TRUST AIR CONDITIONERS OAH24H/O6S4P?

ENERGY STAR lists 4 certified combinations for this outdoor unit. The highest-rated ones use IUMW124H/I61P, IUMC424H/I61P, IUMFC24H/I61P.

24,000 BTU mini-split heat pump · OAH Series

TRUST AIR CONDITIONERS OAH24H/O6S4P

Average cooling efficiency and excellent heating efficiency for a 24,000 BTU mini-split heat pump, and certified for cold climates.

Ranks #157 of 430 24,000 BTU mini-splits for cooling efficiency, and costs about $530 a year to run in a mixed climate like Atlanta.

SEER2: 22.3 Cooling efficiency over a season
Average · beats 53%
HSPF2: 13.3 Heating efficiency over a season
Excellent · beats 95%
EER2: 12.5 Cooling efficiency on a 95°F day
Average · beats 44%
Heat at 5°F: 24,200 BTU/h92% of its 47°F output
Very good · beats 82%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 24,200 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 95% 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

Specifications24,000 BTU, R-454B

General
Brand	TRUST AIR CONDITIONERS
Also sold as	Multi MFG
Outdoor unit model	OAH24H/O6S4P
Series	OAH Series
Type	Mini-split heat pump
Nominal size	24,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	August 20, 2025
Last certified	July 29, 2026
Cooling
SEER2Seasonal efficiency, higher is better	22.3 (range 19.0-22.3)
EER2Efficiency at 95°F outdoors	12.0-12.5
Cooling capacity	22,000-24,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	11.6-13.3
Capacity at 47°F	25,000-26,000 BTU/h
Capacity at 17°F	20,200-23,000 BTU/h
Capacity at 5°F	23,800-24,200 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.00-2.23
ENERGY STAR cold climate	Yes

Heating output as it gets colder92% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with IUMW124H/I61P at the standard test temperatures, in BTU/h:

Certified matchups4 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.
IUMW124H/I61P · cold climate	22.3	12.5	13.3	24,000	217678069
IUMC424H/I61P · cold climate	20.7	12.0	11.6	23,800	217678074
IUMFC24H/I61P · cold climate	20.4	12.0	12.1	24,200	217678090
IUMDH24H/I63P · cold climate	19.0	12.0	11.7	24,000	217678083

Same unit, other model numbers1

These model numbers have exactly the same certified ratings and matchups as the TRUST AIR CONDITIONERS OAH24H/O6S4P: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

Multi MFG MSH-24HD-B

Yearly running cost in 10 large cities$492-$1,251

Phoenix, AZ$598/yr
Miami, FL$492/yr
Houston, TX$535/yr
Atlanta, GA$530/yr
Los Angeles, CA$513/yr
New York, NY$1,251/yr
Chicago, IL$1,013/yr
Denver, CO$840/yr
Seattle, WA$514/yr
Minneapolis, MN$1,038/yr

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

Questions6

What is the SEER2 rating of the TRUST AIR CONDITIONERS OAH24H/O6S4P?: The TRUST AIR CONDITIONERS OAH24H/O6S4P is rated at up to 22.3 SEER2 and 12.5 EER2 for cooling and up to 13.3 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 4 certified matchups SEER2 ranges from 19.0-22.3.
Is the TRUST AIR CONDITIONERS OAH24H/O6S4P good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 24,200 BTU/h at 5°F with a COP of 2.23, so it is still 2.2 times as efficient as electric resistance heat at that temperature.
How much does the TRUST AIR CONDITIONERS OAH24H/O6S4P cost to run per year?: At its rated efficiency it costs about $492-$1,251 a year in electricity in large U.S. cities, depending on climate and local rates - for example $598 in Phoenix and $1,038 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the TRUST AIR CONDITIONERS OAH24H/O6S4P the same as the Multi MFG MSH-24HD-B?: Yes, as far as the certified ratings go. ENERGY STAR lists both 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.
Which indoor units work with the TRUST AIR CONDITIONERS OAH24H/O6S4P?: ENERGY STAR lists 4 certified combinations for this outdoor unit. The highest-rated ones use IUMW124H/I61P, IUMC424H/I61P, IUMFC24H/I61P.
What refrigerant does the TRUST AIR CONDITIONERS OAH24H/O6S4P 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 $588/yrYou save $661/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 TRUST AIR CONDITIONERS OAH24H/O6S4P

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: $588
Current system, per year: $1,249
You save per year: $661
Payback: 13.6 years
Net after 10 years: -$2,392

Cooling $369Heating $219Electricity used: 3,677 kWhSaved vs. a minimum-efficiency heat pump: $376

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 24,000 BTU models

SLIMAIR SHC24AH2AG · cold climate22.3 SEER2 · 13.3 HSPF2
ZERO ZMSB-24HV-USHHCR2-O · cold climate22.3 SEER2 · 13.3 HSPF2
Mainline ML24HP230NEXH-O · cold climate22.3 SEER2 · 13.3 HSPF2
Airquest DLCSRBH24AAK · cold climate22.3 SEER2 · 11.5 HSPF2
Convectair 500004496 · cold climate22.3 SEER2 · 13.3 HSPF2
Breeze33 HSZ24H424ZMO · cold climate22.3 SEER2 · 11.5 HSPF2
ComfortStar CHF3-24CD(O) · cold climate22.3 SEER2 · 13.3 HSPF2
Cooper&Hunter CH-HPR24-230VO · cold climate22.3 SEER2 · 11.5 HSPF2

See all 430 24,000 BTU mini-splits, ranked

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