Cosmo / Cosmo Multi-Zone
Cosmo 24k R-32 208/230V 2-Zone Mini-Split
The Cosmo Multi-Zone 24k pairs two rooms with one 208/230V outdoor unit on R-32, ENERGY STAR certified and AHRI cold-climate designated, at a certified nominal SEER2 of 21 (EER2 13.3 - the strongest EER2 in the Cosmo line, HSPF2 10). As with any multi-zone that nominal depends on the heads you attach.
Heating holds up well in the cold: rated 24000 BTU at 47F, 23600 at 17F, and 21600 at 5F - about 90 percent of its 47F output down at 5F. Cosmo is a value brand sold through TOSOT Direct (TOSOT/Gree family), professionally installed and priced by quote.
Refrigerant generation
R-32 - current-generation refrigerant
Need this installed?
Get installation quotes- Last sourced
- Jul 29, 2026
SplitAtlas score
8.3 / 10
(21.0 SEER2) among 24k systems
(10.0 HSPF2) among 24k systems
(5F certified capacity: 90% of the 47F rating; -22 F heating floor) among 24k systems
(5 yr parts / 5 yr compressor) across the catalogue
(4 verified features) across the catalogue
(6 manuals; spec sheet) 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
- 2-zone projects in the 24k outdoor capacity class.
Install difficulty
- Electrical: 230V; MCA 19.5 A; breaker/fuse 25 A.
- Line set: connection type not sourced; max 328 ft.
- 2-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
- 4
- Newest source retrieved
- Jul 29, 2026
Warranty tiers
- Base
- 5 yr parts / 5 yr compressor - published Cosmo warranty terms
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.
- Structured ratings
- Certification: ENERGY STAR certified, ENERGY STAR cold-climate certified and AHRI cold-climate designated. Refrigerant: current low-GWP R-32. Minimum heating ambient: -22 F.
Strengths
- Strong cold-weather heat: 21600 of its 24000 BTU 47F output retained at 5F.
- Best Cosmo-line efficiency: certified SEER2 21 / EER2 13.3 / HSPF2 10, ENERGY STAR certified.
- Two zones from one outdoor unit and one 208/230V circuit on current R-32.
Weaknesses
- Two-zone total capacity is shared across both rooms.
- Value-brand dealer/service network is thinner than the majors'.
Climate suitability
- Minimum heating ambient
- -22 F[1]
- Certified heating at 5F
- 21,600 BTU/hNon-Ducted Indoor Units[2]
- Rated heating at 17F
- 23,600 BTU/hNon-Ducted Indoor Units[2]
- Rated heating at 47F
- 24,000 BTU/hNon-Ducted Indoor Units[2]
Specifications
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- Manufacturer
- Cosmo
- Brand
- Cosmo
- Product line
- Cosmo Multi-Zone
- Model number
- MZ-COSMO24/O
- Indoor unit model
- Depends on the indoor units you choose
- Outdoor unit model
- MZ-COSMO24/O
- Number of zones
- 2
- Max indoor units
- 2 units[1]
- Rated cooling capacity
- 24,000 BTU/hNon-Ducted Indoor Units[2]
- Rated heating capacity
- 24,000 BTU/hNon-Ducted Indoor Units[2]
- Voltage
- 230 V[1]
- MCA
- 19.5 A[1]
- Maximum fuse or breaker size
- 25 A[1]
- Breaker needed
- not published
- SEER2
- 21 SEER2Non-Ducted Indoor Units[2]
- EER2
- 13.3 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
- 3.9 COP[1]
- COP at 5F
- 2 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
- 58 dBA[1]
- Indoor weight
- Depends on the indoor units you choose
- Outdoor weight
- 112.5 lb[1]
- Refrigerant
- R-32[2]
- Refrigerant charge
- not published
- Manufacturer coverage
- not published
- Line-set size
- 1/4 in liquid / 3/8 in suction
- Included line-set length
- Depends on the indoor units you choose
- Maximum line-set length
- 328 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
- 215708457Non-Ducted Indoor Units[2]
- Warranty
- Base: 5 yr parts / 5 yr compressor (published Cosmo warranty terms). Score uses Base.. TOSOT Direct Cosmo Multi-Zone pages list a 5-year standard warranty for both compressor and parts.
- Install path
- Professional install
- Retail price
- Installed quote only
- Available retailers
- not published
- Manual links
- AHRI public detail 215708457, ENERGY STAR exact AHRI rows 215708457, Cosmo MZ user manual, 24,000 BTU Multi-Zones Split System / MZ-C24 current product page, TOSOT 2025 brochure Cosmo Multi-Zone outdoor condenser specs
- Specification sheet
- TOSOT 2025 brochure Cosmo Multi-Zone outdoor condenser specs
- Last sourced date
- Jul 29, 2026
Installation considerations
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- Liquid line
- 1/4 in[1]
- Suction line
- 3/8 in[1]
- Line connection type
- not published
- Precharged length
- not published
- Included line-set length
- Depends on the indoor units you choose
- Maximum line-set length
- 328 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
- 37.95 x 15.83 x 25.98 in[1]
- Indoor weight
- Depends on the indoor units you choose
- Outdoor weight
- 112.5 lb[1]
- Drain size
- not published
Related systems and guides
- More Cosmo systems
- Cooper Hunter Slim Duct 24k Hyper Concealed Ducted R-454B 208/230V Mini-Split
- Cosmo 24k R-32 208/230V Mini-Split
- Cosmo 18k R-32 208/230V Mini-Split
- Cooper Hunter Slim Duct 24k Regular Concealed Ducted R-454B 208/230V 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 24,000 BTU mini splits of 2026
- The best multi-zone mini splits of 2026
- The best 2-zone (dual-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
- One room won't heat or cool on a multi-zone mini split
- Mini split not heating
- Mini split indoor unit freezing up
- Mini split leaking water
- Mini split remote not working
- Line sets
- Line-set covers
Frequently asked questions
- Can I install the Cosmo Multi-Zone 2-Zone 24,000 BTU R-32 208/230V (MZ-COSMO24/O) myself, or do I need a pro?
- Cosmo Multi-Zone 2-Zone 24,000 BTU R-32 208/230V (MZ-COSMO24/O) 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 Cosmo Multi-Zone 2-Zone 24,000 BTU R-32 208/230V (MZ-COSMO24/O) keep heating in a cold winter?
- The AHRI/ENERGY STAR certification lists 21,600 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 Cosmo Multi-Zone 2-Zone 24,000 BTU R-32 208/230V (MZ-COSMO24/O) need?
- Published electrical requirements: 230 V voltage, 19.5 A minimum circuit ampacity, and 25 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 328 ft. Measure the planned routing before ordering.
- What warranty does the Cosmo Multi-Zone 2-Zone 24,000 BTU R-32 208/230V (MZ-COSMO24/O) carry?
- The manufacturer publishes these warranty tiers: Base: 5 yr parts / 5 yr compressor (published Cosmo warranty terms). 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 Direct: TOSOT 2025 brochure Cosmo Multi-Zone outdoor condenser specsSourced - manufacturer technical document
Covers Frequency, electrical_spec.guaranteed_voltage_range, Maximum breaker size, Maximum fuse size, Minimum circuit ampacity, Phase and more
- Air-Conditioning, Heating, and Refrigeration Institute: AHRI Appendix M1 public detail for MZ-COSMO24/OSourced - 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 public certified air-source heat-pump rows for MZ-COSMO24/OSourced - Energy Star listing
Covers performance_spec.energy_star_cold_climate, Energy Star status
- TOSOT Direct: TOSOT Direct Cosmo Multi-Zone product page warranty languageSourced - manufacturer product page
Covers product_line.name, Legacy compressor warranty value, Legacy warranty value, Base compressor warranty, Base warranty conditions, Base parts warranty and more
Last updated
Jul 29, 2026