SplitAtlas

GREE / Vireo R32

GREE Vireo 20k One-Way Cassette R-32 208/230V Mini-Split

Certified capacity
19,000 BTU/h[2]
SEER2
21.5 SEER2[2]
Heating floor
-22 F[1]
Voltage
230 V[1]
Install path
Professional install

This one deserves a careful read. It is badged 20k, it certifies at 19,000 BTU, and it runs the larger OWC20 head on the *same VIR18 outdoor unit* as the 18k model. You are buying a bigger indoor head on an 18k condenser, not a bigger system.

That is not a trick - a larger head on the same condenser can move air more gently and quietly for the same output - but it does mean you should not expect 20,000 BTU of capacity, and you should not pay a large premium over the 18k for it. It certifies identically to the 18k on efficiency: 21.5 SEER2, 8.5 HSPF2, -22F.

1 zoneProfessional installCurrent

Refrigerant generation

R-32 - current-generation refrigerant

This system's warranty depends on licensed installation — get quotes from installers in your area.

Get installation quotes
Error Codes
GREE one-way ceiling cassette indoor unit for R32 mini-split systems.

Image: GREE Comfort official All-Match One-Way Cassette R32 product page

Data completeness: 100%
Last sourced
Aug 2, 2026

SplitAtlas score

7.5 / 10

Methodology
Cooling efficiencyBelow average

(21.5 SEER2) among 18k systems

Heating efficiencyBottom quartile

(8.5 HSPF2) among 18k systems

Cold-weather performanceAbove average

(5F certified capacity: 73.7% of the 47F rating; -22 F heating floor) among 18k systems

NoiseBottom quartile

(36 dBA indoor min / 59 dBA outdoor) among 18k systems

WarrantyBelow average

(5 yr parts / 7 yr compressor) across the catalogue

Feature setBelow average

(4 verified features) across the catalogue

Documentation & partsBelow average

(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.

    Get a quote

Key ratings

Rated cooling

19,000BTU/h[2]

Rated heating

19,000BTU/h[2]

Buyer review snapshot

Install difficulty

Professional flared-line install
  • Electrical: 230V; MCA 16 A; breaker/fuse 20 A.
  • Line set: Flared line connections; precharged 25 ft; max 131 ft.

Alternatives

Availability and price context

This system needs a professional install, and its warranty depends on who installs it. Its real price is an installed quote that depends on your home, so get installation quotes to price it.

Purchase channel policy

GREE publishes an online/retail warranty-claim path for equipment purchased online, Home Depot, or Lowes rather than treating online purchase as a warranty voidance.

Warranty impact
Online purchase changes the claim path: routine parts use GREE's online claim form, while compressor failures and refrigerant leaks require tech-support confirmation before the online claim.
Installation condition
Warranty claims for online/retail purchases must be completed by a contractor after an on-site diagnosis, with required documentation such as purchase receipt or installation invoice and data-plate photos.
Authorized channel
GREE distributor path for distributor purchases; GREE online warranty claim form for equipment purchased online, Home Depot, or Lowes; GREE offers a 10-year extended warranty through GREE Select dealers, with registration.

GREE online purchases have a manufacturer-published warranty path, but buyers should keep purchase and installation documents and use a licensed HVAC contractor for diagnosis and claims.

Compare online-purchase warranty rules by brand

Source: GREE Comfort: How Does the GREE Warranty Work? Coverage, Claims, and 10-Year Extension Guide; retrieved Aug 15, 2026.

Source date

Model data sourced
Aug 2, 2026
Page reviewed
Aug 2, 2026
Source-backed records
4
Newest source retrieved
Aug 2, 2026

Warranty tiers

Base
5 yr parts / 7 yr compressor - eligible residential system

The score uses Base. Additional published terms are shown for reference and not counted in the score.

Review methodology

Strengths

  • A larger head on the same condenser can run quieter at a given output than the 18k pairing.
  • 19,000 BTU with a -22F low-ambient rating.
  • Same shallow one-way housing, so it fits the same difficult ceilings.

Weaknesses

  • The 20k badge overstates it - certified capacity is 19,000 BTU.
  • Shares the VIR18 outdoor unit with the 18k model, so it is not a capacity upgrade in any real sense.
  • Identical efficiency to the 18k, so the premium is hard to justify unless quiet operation matters to you.

Climate suitability

Minimum heating ambient
-22 F[1]
Certified heating at 5F
14,000 BTU/h[2]
Rated heating at 17F
14,700 BTU/h[2]
Rated heating at 47F
19,000 BTU/h[2]

Specifications

Show
Manufacturer
GREE
Brand
GREE
Product line
Vireo R32
Model number
OWC20HP230V1R32AH indoor / VIR18HP230V1R32AO outdoor
Indoor unit model
OWC20HP230V1R32AH
Outdoor unit model
VIR18HP230V1R32AO
Number of zones
1
Max indoor units
not published
Rated cooling capacity
19,000 BTU/h[2]
Rated heating capacity
19,000 BTU/h[2]
Voltage
230 V[1]
MCA
16 A[1]
Maximum fuse or breaker size
20 A[1]
Breaker needed
not published
SEER2
21.5 SEER2[2]
EER2
10.9 EER2[2]
HSPF2 (Region 4)
8.5 HSPF2[2]
HSPF2 (Region 5)
not published
COP
not published
COP at 47F
not published
COP at 5F
not published
Minimum outdoor heating temperature
-22 F[1]
Minimum outdoor cooling temperature
-20 F[1]
Maximum outdoor temperature
122 F[1]
Indoor noise range
36-46 dB(A)[1]
Outdoor noise rating
59 dBA[1]
Indoor weight
44.1 lb[1]
Outdoor weight
94.8 lb[1]
Refrigerant
R-32[2]
Refrigerant charge
40.6 oz[1]
Manufacturer coverage
not published
Line-set size
1/4 in liquid / 1/2 in suction
Included line-set length
GREE professional single-zone cassette and ducted systems publish field-supplied flared line sizes and maximum/precharged piping data; no included consumer line set length is published.
Maximum line-set length
131 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
not supported[1]
Energy Star status
Not ENERGY STAR certified[2]
AHRI certification number
215417462[2]
Warranty
Base: 5 yr parts / 7 yr compressor (eligible residential system). Score uses Base.. Standard residential GREE mini-split coverage is 5 years parts and 7 years compressor for eligible post-2021 systems.
Install path
Professional install
Retail price
Installed quote only
Available retailers
not published
Manual links
All Match One-Way Cassette R32 service/installation manual, GREE All Match One-Way Cassette R32 official product page, All Match One-Way Cassette R32 owner manual, OWC20HP230V1R32AH / VIR18HP230V1R32AO All Match One-Way Cassette R32 submittal, GREE DFS warranty statement for units installed after 2021-12-31
Specification sheet
OWC20HP230V1R32AH / VIR18HP230V1R32AO All Match One-Way Cassette R32 submittal
Last sourced date
Aug 2, 2026

Electrical requirements

Show
Voltage
230 V[1]
Voltage range
208/230V[1]
Phase
1[1]
Frequency
60 Hz[1]
MCA
16 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
Interconnecting wire size AWG 14 / 4; main power wire per local code.[1]

Installation considerations

Show
Liquid line
1/4 in[1]
Suction line
1/2 in[1]
Line connection type
Flared line connections[1]
Precharged length
25 ft[1]
Included line-set length
GREE professional single-zone cassette and ducted systems publish field-supplied flared line sizes and maximum/precharged piping data; no included consumer line set length is published.
Maximum line-set length
131 ft[1]
Max line set per indoor
not published
Max height between indoor units
not published
Indoor dimensions
38-55/64 x 15-5/32 x 7-1/64 in[1]
Outdoor dimensions
37-23/32 x 15-53/64 x 25-63/64 in[1]
Indoor weight
44.1 lb[1]
Outdoor weight
94.8 lb[1]
Drain size
not published

Related systems and guides

Frequently asked questions

Can I install the GREE Vireo R32 20,000 BTU One-Way Ceiling Cassette R-32 208/230V (OWC20HP230V1R32AH / VIR18HP230V1R32AO) myself, or do I need a pro?
GREE Vireo R32 20,000 BTU One-Way Ceiling Cassette R-32 208/230V (OWC20HP230V1R32AH / VIR18HP230V1R32AO) 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 GREE Vireo R32 20,000 BTU One-Way Ceiling Cassette R-32 208/230V (OWC20HP230V1R32AH / VIR18HP230V1R32AO) keep heating in a cold winter?
The AHRI/ENERGY STAR certification lists 14,000 BTU/h of heating capacity at 5F. Rated heating operation extends down to -22 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 GREE Vireo R32 20,000 BTU One-Way Ceiling Cassette R-32 208/230V (OWC20HP230V1R32AH / VIR18HP230V1R32AO) need?
Published electrical requirements: 230 V voltage, 16 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 ft. The outdoor unit's factory charge covers up to 25 ft of line; longer runs need added refrigerant. Measure the planned routing before ordering.
What warranty does the GREE Vireo R32 20,000 BTU One-Way Ceiling Cassette R-32 208/230V (OWC20HP230V1R32AH / VIR18HP230V1R32AO) carry?
The manufacturer publishes these warranty tiers: Base: 5 yr parts / 7 yr compressor (eligible residential system). 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. GREE Comfort: OWC20HP230V1R32AH and SAP18HP230V1R32AO GREE All Match One-Way Cassette R32 submittalSourced - manufacturer technical document

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

  2. Air-Conditioning, Heating, and Refrigeration Institute: AHRI Active form-factor row 215415559Sourced - AHRI directory

    Covers AHRI certification number, Rated cooling capacity, EER2, Energy Star status, Rated heating capacity, HSPF2 (Region 4) and more

  3. GREE Comfort: GREE All Match One-Way Cassette R32 official product pageSourced - manufacturer technical document

    Covers Form factor

  4. GREE Comfort: GREE DFS warranty statement for units installed after 2021-12-31Sourced - manufacturer technical document

    Covers Legacy compressor warranty value, Legacy warranty value, Base compressor warranty, Base warranty conditions, Base parts warranty, Warranty notes

Last updated

Aug 2, 2026