What is the SEER2 rating of the TOSOT TM48D6MO?

The TOSOT TM48D6MO is rated at up to 21.0 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 18.0-21.0.

Is the TOSOT TM48D6MO good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 37,800 BTU/h at 5°F with a COP of 2.10, so it is still 2.1 times as efficient as electric resistance heat at that temperature.

How much does the TOSOT TM48D6MO cost to run per year?

At its rated efficiency it costs about $1,076-$3,001 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,344 in Phoenix and $2,521 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the TOSOT TM48D6MO the same as the TOSOT TM48WH21MO?

Yes, as far as the certified ratings go. ENERGY STAR lists 3 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.

48,000 BTU mini-split heat pump · R32 FreeMatch

TOSOT TM48D6MO

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

Ranks #69 of 146 48,000 BTU mini-splits for cooling efficiency, and costs about $1,243 a year to run in a mixed climate like Atlanta.

SEER2: 21.0 Cooling efficiency over a season
Below average · beats 30%
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: 37,800 BTU/h79% of its 47°F output
Average · beats 67%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 37,800 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.

Calculate my running cost

Details

Specifications48,000 BTU, R-32

General
Brand	TOSOT
Outdoor unit model	TM48D6MO
Series	R32 FreeMatch
Type	Mini-split heat pump
Nominal size	48,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-32
Connected (smart) capable	No
On the market since	December 10, 2024
Last certified	April 21, 2026
Cooling
SEER2Seasonal efficiency, higher is better	21.0 (range 18.0-21.0)
EER2Efficiency at 95°F outdoors	11.7-12.0
Cooling capacity	48,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.1-10.0
Capacity at 47°F	48,000 BTU/h
Capacity at 17°F	40,000 BTU/h
Capacity at 5°F	36,000-37,800 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.84-2.10
ENERGY STAR cold climate	Yes

Heating output as it gets colder79% 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	21.0	12.0	10.0	37,800	216618256
- · cold climate	19.0	11.8	9.0	37,000	216618258
- · cold climate	18.0	11.7	8.1	36,000	216618257

Same unit, other model numbers2

These model numbers have exactly the same certified ratings and matchups as the TOSOT TM48D6MO: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

TOSOT TM48WH21MO
TOSOT TMSCI7H4R48

Yearly running cost in 10 large cities$1,076-$3,001

Phoenix, AZ$1,344/yr
Miami, FL$1,076/yr
Houston, TX$1,205/yr
Atlanta, GA$1,243/yr
Los Angeles, CA$1,215/yr
New York, NY$3,001/yr
Chicago, IL$2,442/yr
Denver, CO$2,035/yr
Seattle, WA$1,254/yr
Minneapolis, MN$2,521/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 TOSOT TM48D6MO?: The TOSOT TM48D6MO is rated at up to 21.0 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 18.0-21.0.
Is the TOSOT TM48D6MO good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 37,800 BTU/h at 5°F with a COP of 2.10, so it is still 2.1 times as efficient as electric resistance heat at that temperature.
How much does the TOSOT TM48D6MO cost to run per year?: At its rated efficiency it costs about $1,076-$3,001 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,344 in Phoenix and $2,521 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the TOSOT TM48D6MO the same as the TOSOT TM48WH21MO?: Yes, as far as the certified ratings go. ENERGY STAR lists 3 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 TOSOT TM48D6MO 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 $1,342/yrYou save $1,133/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 TOSOT TM48D6MO

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: $1,342
Current system, per year: $2,475
You save per year: $1,133
Payback: 15.9 years
Net after 10 years: -$6,672

Cooling $805Heating $538Electricity used: 8,389 kWhSaved vs. a minimum-efficiency heat pump: $556

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

ECO AC EMH-*O48KBB · cold climate21.0 SEER2 · 10.0 HSPF2
Blueridge BMM48C21.1 SEER2 · 9.5 HSPF2
LG KUSXA481A · cold climate20.8 SEER2 · 10.6 HSPF2
Arcoaire DLCMRBH48EAK21.1 SEER2 · 9.5 HSPF2
LG KUMXB541A20.6 SEER2 · 9.5 HSPF2
PerfectAire 3PAMS48-HH-MZO5 · cold climate21.2 SEER2 · 10.0 HSPF2
LG KUMXA481A · cold climate20.5 SEER2 · 10.5 HSPF2
Goodman MST483G22MHAA · cold climate21.2 SEER2 · 10.0 HSPF2

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

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of April 21, 2026. How we use the data.