SplitAtlas

Cosmo / Cosmo Series

Cosmo 24k R-32 208/230V Mini-Split

Certified capacity
24,000 BTU/h[4]
SEER2
19 SEER2[4]
Heating floor
-13 F[1]
Voltage
230 V[1]
Install path
Professional install / DIY-marketed

The Cosmo 24k is the value 2-ton: SEER2 19, EER2 11.9, HSPF2 8.5 on R-32, with 22,400 BTU at 47F, 19,200 BTU at 17F and 15,700 BTU at 5F. It pairs a solid EER2 of 11.9 with 70% heat retention at 5F, ENERGY STAR certified, for a large room at a value price.

1 zoneProfessional install / DIY-marketedCurrent

Refrigerant generation

R-32 - current-generation refrigerant

Paid link

$1,399 / Checked Jul 24, 2026

$1,399 at TOSOT Direct

Need this installed?

Get installation quotes
Error Codes
Data completeness: 98%
Last sourced
Aug 17, 2026

SplitAtlas score

7.7 / 10

Methodology
Cooling efficiencyBottom quartile

(19.0 SEER2) among 24k systems

Heating efficiencyBottom quartile

(8.5 HSPF2) among 24k systems

Cold-weather performanceBelow average

(5F certified capacity: 70.1% of the 47F rating; -13 F heating floor) among 24k systems

WarrantyBottom quartile

(5 yr parts / 5 yr compressor) across the catalogue

Feature setTop quartile

(6 verified features) across the catalogue

Price-to-performanceTop quartile

($1,399 median retail) among 24k systems

Documentation & partsTop quartile

(4 manuals; spec sheet; 14 error-code rows) across the catalogue

Key ratings

Rated cooling

24,000BTU/h[4]

Rated heating

22,400BTU/h[4]

Buyer review snapshot

Install difficulty

Professional flared-line install
  • Electrical: 230V; MCA 15 A; breaker/fuse 20 A.
  • Line set: Flared line connections; included 16 ft; max 131.2 ft.

Alternatives

Availability and price context

  • Last seen at TOSOT Direct on Jul 24, 2026: $1,399.00. Open the listing for today's price.

Source date

Model data sourced
Aug 17, 2026
Page reviewed
Jul 24, 2026
Source-backed records
5
Newest source retrieved
Aug 17, 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.

Review methodology

Strengths

  • EER2 11.9 - good peak efficiency for 2 tons.
  • Holds 19,200 BTU at 17F and 15,700 BTU at 5F - dependable deep-cold output.
  • ENERGY STAR with current R-32 refrigerant; Gree-built.

Weaknesses

  • SEER2 19 / HSPF2 8.5 - conventional seasonal efficiency.
  • Value-brand support network; a zoned design may suit some 2-ton loads better.

Climate suitability

Minimum heating ambient
-13 F[1]
Certified heating at 5F
15,700 BTU/h[4]
Rated heating at 17F
19,200 BTU/h[4]
Rated heating at 47F
22,400 BTU/h[4]

Specifications

Show
Manufacturer
Cosmo
Brand
Cosmo
Product line
Cosmo Series
Model number
GWH24AWEXF-D6DN*/I indoor / GWH24ATEXF-D6DNA1F/O outdoor
Indoor unit model
GWH24AWEXF-D6DN*/I
Outdoor unit model
GWH24ATEXF-D6DNA1F/O
Number of zones
1
Max indoor units
not published
Rated cooling capacity
24,000 BTU/h[4]
Rated heating capacity
22,400 BTU/h[4]
Voltage
230 V[1]
MCA
15 A[1]
Maximum fuse or breaker size
20 A[1]
Breaker needed
not published
SEER2
19 SEER2[4]
EER2
11.9 EER2[4]
HSPF2 (Region 4)
8.5 HSPF2[4]
HSPF2 (Region 5)
not published
COP
not published
COP at 47F
not published
COP at 5F
1.75 COP[4]
Minimum outdoor heating temperature
-13 F[1]
Minimum outdoor cooling temperature
-13 F[1]
Maximum outdoor temperature
118 F[1]
Indoor noise range
51/36 dB(A)[1]
Outdoor noise rating
not published
Indoor weight
33.1 lb[1]
Outdoor weight
93.7 lb[1]
Refrigerant
R-32[4]
Refrigerant charge
not published
Manufacturer coverage
not published
Line-set size
1/4 in liquid / 1/2 in suction
Included line-set length
16 ft[2]
Maximum line-set length
131.2 ft[1]
Max line set per indoor
not published
Maximum elevation difference
82 ft[1]
Max height between indoor units
not published
Wi-Fi support
supported[2]
Energy Star status
ENERGY STAR certified[5]
AHRI certification number
215434505[4]
Warranty
Base: 5 yr parts / 5 yr compressor (published Cosmo warranty terms). Score uses Base.. 5-year TOSOT Direct Cosmo product-page warranty
Install path
Professional install / DIY-marketed
Marketing install label
DIY-marketed
Retail price
$1,399.00
Available retailers
TOSOT Direct
Manual links
Cosmo Single-Zone 9-24K User Manual, TOSOT Direct product documents page for Cosmo Series manuals, 24,000 BTU Mini-Split Heat Pump Air Conditioner-230V product-page specifications, TOSOT Cosmo Series brochure specifications for GWH24ATEXF-D6DNA1F
Specification sheet
24,000 BTU Mini-Split Heat Pump Air Conditioner-230V product-page specifications
Last sourced date
Aug 17, 2026

Retail purchase context

Some retailer links may earn us a commission at no extra cost; paid relationships never change scores or recommendations. Affiliate disclosure

Paid link

$1,399 at TOSOT Direct

$1,399 / Checked Jul 24, 2026

Electrical requirements

Show
Voltage
230 V[1]
Voltage range
208/230V[1]
Phase
1[1]
Frequency
60 Hz[1]
MCA
15 A[1]
Breaker needed
not published
Maximum breaker size
20 A[1]
Maximum fuse size
20 A[1]
Maximum cooling current
not published
Maximum heating current
not published
Manufacturer wire notes
3*14AWG; 230V 30-Amp Double Pole[1]

Installation considerations

Show
Liquid line
1/4 in[1]
Suction line
1/2 in[1]
Line connection type
Flared line connections[3]
Precharged length
not published
Included line-set length
16 ft[2]
Maximum line-set length
131.2 ft[1]
Max line set per indoor
not published
Max height between indoor units
not published
Indoor dimensions
42.4 in W x 13.1 in H x 9.7 in D[1]
Outdoor dimensions
37.7 in W x 26 in H x 15.8 in D[1]
Indoor weight
33.1 lb[1]
Outdoor weight
93.7 lb[1]
Drain size
not published

Related systems and guides

Frequently asked questions

Can I install the Cosmo Series 24,000 BTU R-32 208/230V (GWH24AWEXF-D6DN***/I / GWH24ATEXF-D6DNA1F/O) myself, or do I need a pro?
Cosmo Series 24,000 BTU R-32 208/230V (GWH24AWEXF-D6DN***/I / GWH24ATEXF-D6DNA1F/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 Series 24,000 BTU R-32 208/230V (GWH24AWEXF-D6DN***/I / GWH24ATEXF-D6DNA1F/O) keep heating in a cold winter?
The AHRI/ENERGY STAR certification lists 15,700 BTU/h of heating capacity at 5F. Rated heating operation extends down to -13 F. Certified heating efficiency is 8.5 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 Series 24,000 BTU R-32 208/230V (GWH24AWEXF-D6DN***/I / GWH24ATEXF-D6DNA1F/O) need?
Published electrical requirements: 230 V voltage, 15 A minimum circuit ampacity, and 20 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 is 131.2 ft. A 16 ft line set is included. Longer runs than the included set allows require a different line set, so measure the planned routing before ordering.
What warranty does the Cosmo Series 24,000 BTU R-32 208/230V (GWH24AWEXF-D6DN***/I / GWH24ATEXF-D6DNA1F/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

Show
  1. TOSOT Direct: TOSOT Residential and Light Commercial Split Systems brochure Cosmo table for GWH09ATCXB-D6DNA1CSourced - manufacturer technical document

    Covers Frequency, Maximum breaker size, Maximum fuse size, Minimum circuit ampacity, Phase, Manufacturer wire notes and more

  2. TOSOT Direct: 24,000 BTU Mini-Split Heat Pump Air Conditioner-230V official product pageSourced - manufacturer product page

    Covers Included line-set length, Wi-Fi support, Retail price, Legacy compressor warranty value, Legacy warranty value, Base compressor warranty and more

  3. TOSOT Direct / Cosmo: Cosmo Single-Zone 9-24K User ManualSourced - secondary source

    Covers Line connection type

  4. AHRI certificate #215434505 - search the AHRI DirectorySourced - AHRI directory

    Covers AHRI certification number, Rated cooling capacity, COP at 5F, EER2, Rated heating capacity, HSPF2 (Region 4) and more

  5. ENERGY STAR: ENERGY STAR exact row check for AHRI 216997533Sourced - Energy Star listing

    Covers Energy Star status

Last updated

Jul 24, 2026