What is the SEER2 rating of the ComfortStar CHF48CD(O)?

The ComfortStar CHF48CD(O) is rated at up to 17.0 SEER2 and 8.2 EER2 for cooling and up to 10.7 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 2 certified matchups SEER2 ranges from 16.8-17.0.

Is the ComfortStar CHF48CD(O) good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 49,000 BTU/h at 5°F with a COP of 1.98, so it is still 2.0 times as efficient as electric resistance heat at that temperature.

How much does the ComfortStar CHF48CD(O) cost to run per year?

At its rated efficiency it costs about $1,307-$3,209 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,584 in Phoenix and $2,647 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the ComfortStar CHF48CD(O) the same as the TRUST AIR CONDITIONERS OAH48H/O4S41P?

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.

Which indoor units work with the ComfortStar CHF48CD(O)?

ENERGY STAR lists 2 certified combinations for this outdoor unit. The highest-rated ones use COMFORTSTAR FPA-48DU, COMFORTSTAR TIP-48.

What refrigerant does the ComfortStar CHF48CD(O) 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.

48,000 BTU mini-split heat pump · C series

ComfortStar CHF48CD(O)

Below average cooling efficiency and average heating efficiency for a 48,000 BTU mini-split heat pump, and certified for cold climates.

Ranks #141 of 146 48,000 BTU mini-splits for cooling efficiency, and costs about $1,374 a year to run in a mixed climate like Atlanta.

SEER2: 17.0 Cooling efficiency over a season
Below average · beats 2%
HSPF2: 10.7 Heating efficiency over a season
Average · beats 68%
EER2: 8.2 Cooling efficiency on a 95°F day
Below average · beats 0%
Heat at 5°F: 49,000 BTU/h96% of its 47°F output
Below average · beats 37%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 49,000 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 want the newest refrigerant - it uses R-410A, which is being phased down.

Calculate my running cost

Details

Specifications48,000 BTU, R-410A

General
Brand	ComfortStar
Also sold as	TRUST AIR CONDITIONERS, Mitsutomo, Breeze33
Outdoor unit model	CHF48CD(O)
Series	C series
Type	Mini-split heat pump
Nominal size	48,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	February 2, 2020
Last certified	May 28, 2026
Cooling
SEER2Seasonal efficiency, higher is better	17.0 (range 16.8-17.0)
EER2Efficiency at 95°F outdoors	8.2-8.3
Cooling capacity	48,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	9.8-10.7
Capacity at 47°F	51,000-53,000 BTU/h
Capacity at 17°F	35,000 BTU/h
Capacity at 5°F	48,000-49,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.80-1.98
ENERGY STAR cold climate	Yes

Heating output as it gets colder96% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with FPA-48DU 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.
FPA-48DU COMFORTSTAR · cold climate	17.0	8.2	9.8	49,000	207658963
TIP-48 COMFORTSTAR · cold climate	16.8	8.3	10.7	48,000	207658954

Same unit, other model numbers3

These model numbers have exactly the same certified ratings and matchups as the ComfortStar CHF48CD(O): the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

TRUST AIR CONDITIONERS OAH48H/O4S41P
Mitsutomo HO-SZ48-BB-Q
Breeze33 BZ33-HYP48OUT2-G2-P

Yearly running cost in 10 large cities$1,307-$3,209

Phoenix, AZ$1,584/yr
Miami, FL$1,322/yr
Houston, TX$1,418/yr
Atlanta, GA$1,374/yr
Los Angeles, CA$1,324/yr
New York, NY$3,209/yr
Chicago, IL$2,591/yr
Denver, CO$2,142/yr
Seattle, WA$1,307/yr
Minneapolis, MN$2,647/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 ComfortStar CHF48CD(O)?: The ComfortStar CHF48CD(O) is rated at up to 17.0 SEER2 and 8.2 EER2 for cooling and up to 10.7 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 2 certified matchups SEER2 ranges from 16.8-17.0.
Is the ComfortStar CHF48CD(O) good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 49,000 BTU/h at 5°F with a COP of 1.98, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
How much does the ComfortStar CHF48CD(O) cost to run per year?: At its rated efficiency it costs about $1,307-$3,209 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,584 in Phoenix and $2,647 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the ComfortStar CHF48CD(O) the same as the TRUST AIR CONDITIONERS OAH48H/O4S41P?: 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.
Which indoor units work with the ComfortStar CHF48CD(O)?: ENERGY STAR lists 2 certified combinations for this outdoor unit. The highest-rated ones use COMFORTSTAR FPA-48DU, COMFORTSTAR TIP-48.
What refrigerant does the ComfortStar CHF48CD(O) 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 $1,549/yrYou save $1,008/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 ComfortStar CHF48CD(O)

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: $1,549
Current system, per year: $2,557
You save per year: $1,008
Payback: 17.9 years
Net after 10 years: -$7,918

Cooling $994Heating $555Electricity used: 9,679 kWhSaved vs. a minimum-efficiency heat pump: $424

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 48,000 BTU models

MDV MOE30U-48HFN1-M-[X](GA)-L · cold climate17.0 SEER2 · 12.0 HSPF2
Cooper&Hunter CH-NHPR48LCU-230VO · cold climate17.0 SEER2 · 10.7 HSPF2
MDV MOE30U-48HFN1-M-[X](GA) · cold climate17.0 SEER2 · 12.0 HSPF2
LBG Products LUUHB48DO · cold climate17.0 SEER2 · 10.7 HSPF2
Lennox MLB048S4S-2P · cold climate17.0 SEER2 · 12.0 HSPF2
Blueridge BMY48HHUC · cold climate17.0 SEER2 · 9.8 HSPF2
Lennox MLB048S4S-1P · cold climate17.0 SEER2 · 12.0 HSPF2
MOOVAIR DMA48HOS28230E8 · cold climate16.8 SEER2 · 10.7 HSPF2

See all 146 48,000 BTU mini-splits, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of May 28, 2026. How we use the data.