TOSOT / Multi Ultra Heat
TOSOT Multi Ultra Heat 55k R-32 208/230V 6-Zone Mini-Split
The TOSOT Multi Ultra Heat 6-zone is the top of the line: up to six rooms from one 208/230V outdoor unit on R-32, ENERGY STAR certified, at a certified nominal SEER2 of 21 (EER2 11.65, HSPF2 10). Unlike the smaller Multi Ultra Heat units, the 6-zone is not AHRI cold-climate designated, so treat it as broad-coverage rather than a hard-freeze specialist.
Its certified heating is rated 55000 BTU at 47F, 41000 at 17F, and 36400 at 5F, tapering through deep cold. That certified SEER2 is the all-non-ducted nominal and depends on the heads you attach.
TOSOT is a value brand (TOSOT/Gree family) sold on tosot.com, professionally installed and priced by quote.
Refrigerant generation
R-32 - current-generation refrigerant
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Image: TOSOT
- Last sourced
- Jul 29, 2026
SplitAtlas score
8.0 / 10
(21.0 SEER2) among >36k systems
(10.0 HSPF2) among >36k systems
(5F certified capacity: 66.2% of the 47F rating; -22 F heating floor) among >36k systems
(10 yr parts / 10 yr compressor) across the catalogue
(3 verified features) across the catalogue
(6 manuals; spec sheet; 14 error-code rows) across the catalogue
Not evaluated
- Installation accessibility — not applicable (professional install)N/A
professional install - DIY-accessibility not applicable
- Price-to-value — not evaluatedN/A
This is a professionally installed, quote-only system, so we can't score its price. Get an installed quote to compare real cost.
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Key ratings
Buyer review snapshot
Best for / skip if
Best for
- 6-zone projects in the 54k outdoor capacity class.
Install difficulty
- Electrical: 230V; MCA 37.5 A; breaker/fuse 40 A.
- Line set: connection type not sourced; precharged 197 ft; max 394 ft.
- 6-zone condenser; indoor-head matching and branch layout are part of the job.
Availability and price context
This TOSOT/Cosmo multi-zone system is sold through dealers, so its price comes as an installed quote that depends on your home. Get installation quotes to price it.
Source date
- Model data sourced
- Jul 29, 2026
- Page reviewed
- Jul 29, 2026
- Source-backed records
- 5
- Newest source retrieved
- Jul 29, 2026
Warranty tiers
- Base
- 10 yr parts / 10 yr compressor - equipment sold and installed by licensed professionals in residential applications
The score uses Base. Additional published terms are shown for reference and not counted in the score.
Model context
- Install path
- This is professional-install equipment; price it with an installed quote.
Strengths
- Six zones of coverage and 55000 BTU of 47F heating from a single outdoor unit.
- ENERGY STAR certified on current R-32 refrigerant at a value price.
- One 208/230V circuit for up to six rooms.
Weaknesses
- Not AHRI cold-climate designated, and heating tapers to 36400 BTU at 5F - size for deep cold carefully.
- Six-zone total capacity is shared and modest per room; size heads carefully.
Climate suitability
- Minimum heating ambient
- -22 F[1]
- Certified heating at 5F
- 36,400 BTU/hNon-Ducted Indoor Units[2]
- Rated heating at 17F
- 41,000 BTU/hNon-Ducted Indoor Units[2]
- Rated heating at 47F
- 55,000 BTU/hNon-Ducted Indoor Units[2]
Specifications
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- Manufacturer
- TOSOT
- Brand
- TOSOT
- Product line
- Multi Ultra Heat
- Model number
- TMH60D32MO
- Indoor unit model
- Depends on the indoor units you choose
- Outdoor unit model
- TMH60D32MO
- Number of zones
- 6
- Max indoor units
- 6 units[1]
- Rated cooling capacity
- 55,000 BTU/hNon-Ducted Indoor Units[2]
- Rated heating capacity
- 55,000 BTU/hNon-Ducted Indoor Units[2]
- Voltage
- 230 V[1]
- MCA
- 37.5 A[1]
- Maximum fuse or breaker size
- 40 A[1]
- Breaker needed
- not published
- SEER2
- 21 SEER2Non-Ducted Indoor Units[2]
- EER2
- 11.65 EER2Non-Ducted Indoor Units[2]
- HSPF2 (Region 4)
- 10 HSPF2Non-Ducted Indoor Units[2]
- HSPF2 (Region 5)
- Varies by indoor-unit combination
- COP
- not published
- COP at 47F
- not published
- COP at 5F
- 1.9 COPNon-Ducted Indoor Units[2]
- Minimum outdoor heating temperature
- -22 F[1]
- Minimum outdoor cooling temperature
- -22 F[1]
- Maximum outdoor temperature
- 118 F[1]
- Indoor noise range
- Depends on the indoor units you choose
- Outdoor noise rating
- 54 dBA[1]
- Indoor weight
- Depends on the indoor units you choose
- Outdoor weight
- 225 lb[1]
- Refrigerant
- R-32[2]
- Refrigerant charge
- 112.88 oz[1]
- Manufacturer coverage
- not published
- Line-set size
- 1/4 in ports A-E; allowable indoor units 1-6 liquid / 1/2 in x 2 and 3/8 in x 3; allowable indoor units 1-6 suction
- Included line-set length
- Depends on the indoor units you choose
- Maximum line-set length
- 394 ft[1]
- Max line set per indoor
- 82 ft[1]
- Maximum elevation difference
- 82 ft[1]
- Max height between indoor units
- 82 ft[1]
- Wi-Fi support
- Depends on the indoor units you choose
- Energy Star status
- ENERGY STAR certified[3]
- AHRI certification number
- 217994526Non-Ducted Indoor Units[2]
- Warranty
- Base: 10 yr parts / 10 yr compressor (equipment sold and installed by licensed professionals in residential applications). Score uses Base.. TOSOT warranty information lists a standard 10-year compressor warranty and 10-year parts warranty for equipment sold and installed by licensed professionals in residential applications.
- Install path
- Professional install
- Retail price
- Installed quote only
- Available retailers
- not published
- Manual links
- AHRI public detail 217994526, ENERGY STAR exact AHRI rows 217994526, TOSOT Multi Ultra Heat / TMH60D32MO current product page, TMH60D32MO TOSOT Multi Ultra Heat submittal, TOSOT warranty information
- Specification sheet
- TMH60D32MO TOSOT Multi Ultra Heat submittal
- Last sourced date
- Jul 29, 2026
Installation considerations
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- Liquid line
- 1/4 in ports A-E; allowable indoor units 1-6[1]
- Suction line
- 1/2 in x 2 and 3/8 in x 3; allowable indoor units 1-6[1]
- Line connection type
- not published
- Precharged length
- 197 ft[1]
- Included line-set length
- Depends on the indoor units you choose
- Maximum line-set length
- 394 ft[1]
- Max line set per indoor
- 82 ft[1]
- Max height between indoor units
- 82 ft[1]
- Indoor dimensions
- Depends on the indoor units you choose
- Outdoor dimensions
- 38-55/64 x 16-7/32 x 49-49/64 in[1]
- Indoor weight
- Depends on the indoor units you choose
- Outdoor weight
- 225 lb[1]
- Drain size
- not published
Related systems and guides
- More TOSOT systems
- GREE Free Match 60k R-32 208/230V 6-Zone Mini-Split
- Cooper Hunter Slim Duct 58k Concealed Ducted R-454B 208/230V Mini-Split
- TOSOT Multi Ultra Heat 48k R-32 208/230V 5-Zone Mini-Split
- TOSOT Multi Ultra Heat 42k R-32 208/230V 5-Zone Mini-Split
- Guide library
- Mini split buying guide
- Single-zone vs multi-zone mini splits
- Troubleshooting
- Do mini splits work in cold weather?
- The best multi-zone mini splits of 2026
- The best 4-zone mini splits of 2026
- How to size a multi-zone mini split
- Not every multi-zone condenser lets you mix head types
- How much does a multi-zone mini split cost?
- The best cold-climate mini splits of 2026
- The best mini splits for heating of 2026
- Mini split heating capacity in the cold: what your unit actually delivers at 5F
- The mini split defrost cycle, explained
- One room won't heat or cool on a multi-zone mini split
- Mini split not heating
- Mini split indoor unit freezing up
- Your mini split is showing a refrigerant leak code
- Mini split remote not working
- Line sets
- Line-set covers
Frequently asked questions
- Can I install the TOSOT Multi Ultra Heat 6-Zone 55,000 BTU R-32 208/230V (TMH60D32MO) myself, or do I need a pro?
- TOSOT Multi Ultra Heat 6-Zone 55,000 BTU R-32 208/230V (TMH60D32MO) is built for professional installation: the line set must be flared, evacuated, and charged, which requires EPA-certified refrigerant handling. Installing it outside the manufacturer's requirements can void the warranty, so budget for a qualified HVAC installer.
- Will the TOSOT Multi Ultra Heat 6-Zone 55,000 BTU R-32 208/230V (TMH60D32MO) keep heating in a cold winter?
- The AHRI/ENERGY STAR certification lists 36,400 BTU/h of heating capacity at 5F. Rated heating operation extends down to -22 F. Certified heating efficiency is 10 HSPF2. Match those numbers against your climate's design temperature - in cold regions, output at 5F matters far more than the nameplate capacity measured at 47F.
- What electrical circuit does the TOSOT Multi Ultra Heat 6-Zone 55,000 BTU R-32 208/230V (TMH60D32MO) need?
- Published electrical requirements: 230 V voltage, 37.5 A minimum circuit ampacity, and 40 A maximum breaker or fuse sizing. Confirm the final circuit against the unit nameplate and local code with a licensed electrician.
- How far can the outdoor unit be from the indoor head?
- The published maximum line-set length from the outdoor unit to one indoor head is 82 ft. The combined piping limit across all heads is 394 ft. The outdoor unit's factory charge covers up to 197 ft of line; longer runs need added refrigerant. Measure the planned routing before ordering.
- What warranty does the TOSOT Multi Ultra Heat 6-Zone 55,000 BTU R-32 208/230V (TMH60D32MO) carry?
- The manufacturer publishes these warranty tiers: Base: 10 yr parts / 10 yr compressor (equipment sold and installed by licensed professionals in residential applications). Score uses Base.. Registration requirements and proof of qualified installation commonly affect coverage, so read the warranty terms before install day.
Data sources
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- TOSOT: TMH60D32MO TOSOT Multi Ultra Heat submittalSourced - manufacturer technical document
Covers Frequency, electrical_spec.guaranteed_voltage_range, Maximum breaker size, Maximum fuse size, Minimum circuit ampacity, Phase and more
- AHRI certificate #217994526 - search the AHRI DirectorySourced - AHRI directory
Covers AHRI certification number, performance_spec.cold_climate_designation, Rated cooling capacity, COP at 5F, EER2, Rated heating capacity and more
- ENERGY STAR: ENERGY STAR exact row check for AHRI 215735288Sourced - Energy Star listing
Covers performance_spec.energy_star_cold_climate, Energy Star status
- TOSOT: TOSOT Multi Ultra Heat / TMH60D32MO current product evidenceSourced - manufacturer product page
Covers product_line.name
- TOSOT: TOSOT warranty informationSourced - manufacturer product page
Covers Legacy compressor warranty value, Legacy warranty value, Base compressor warranty, Base warranty conditions, Base parts warranty, Warranty notes
Last updated
Jul 29, 2026