SplitAtlas

Goodman / Goodman 20 Series

Goodman 20 12k R-32 208/230V Mini-Split

Certified capacity
12,000 BTU/h[2]
SEER2
19.5 SEER2[2]
Heating floor
-13 F[1]
Voltage
230 V[1]
Install path
Professional install

If your winters are genuinely cold and you're hiring an installer, this is a strong value pick for one room. Goodman, now part of Daikin, makes the 20 Series as its cold-climate ductless line. This 12,000 BTU unit holds almost all of its heat on a 5F morning and keeps running to -13F.

It's efficient for a value brand, and very quiet at its lowest speed. The catches: it isn't ENERGY STAR certified, which can rule it out of some utility rebates. And Goodman's ductless business is much smaller than its central-air business, so not every installer knows it.

1 zoneProfessional installCurrent

Refrigerant generation

R-32 - current-generation refrigerant

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Error Codes
Data completeness: 83%
Last sourced
Jul 27, 2026

SplitAtlas score

8.4 / 10

Methodology
Cooling efficiencyBottom quartile

(19.5 SEER2) among 12k systems

Heating efficiencyBelow average

(10.0 HSPF2) among 12k systems

Cold-weather performanceAbove average

(5F certified capacity: 96.3% of the 47F rating; -13 F heating floor) among 12k systems

NoiseTop 10%

(19 dBA indoor min / 50 dBA outdoor) among 12k systems

WarrantyAbove average

(10 yr parts, no separate compressor term) across the catalogue

Feature setAbove average

(4 verified features) across the catalogue

Documentation & partsBelow average

(5 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

12,000BTU/h[2]

Rated heating

13,500BTU/h[2]

Buyer review snapshot

Install difficulty

Professional install
  • Electrical: 230V; breaker/fuse 15 A.
  • Line set: connection type not sourced; precharged 49 ft; max 66 ft.

Alternatives

Availability and price context

This system needs a professional install, so its real price is an installed quote that depends on your home. We don't link to a listing for this exact model; get installation quotes to price it.

Source date

Model data sourced
Jul 27, 2026
Page reviewed
Jul 27, 2026
Source-backed records
3
Newest source retrieved
Jul 27, 2026

Warranty tiers

Registered
10 yr parts / no separate compressor term - registration; complete Goodman warranty terms apply

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

Review methodology

Model context

Structured ratings
Certification: ENERGY STAR certified and AHRI cold-climate designated. Refrigerant: current low-GWP R-32. Minimum heating ambient: -13 F.

Strengths

  • Holds almost all of its heat at 5F.
  • Very quiet at its lowest speed.
  • Efficient for a value brand, on current R-32 refrigerant.

Weaknesses

  • Not ENERGY STAR certified, so it may not qualify for rebates tied to that label.
  • Goodman's ductless line is much smaller than its central-air business, so fewer installers know it well.

Climate suitability

Minimum heating ambient
-13 F[1]
Certified heating at 5F
13,000 BTU/h[2]
Rated heating at 17F
11,800 BTU/h[2]
Rated heating at 47F
13,500 BTU/h[2]

Specifications

Show
Manufacturer
Goodman
Brand
Goodman
Product line
Goodman 20 Series
Model number
GTXV12BVJN indoor / GRXTH12BVJN outdoor
Indoor unit model
GTXV12BVJN
Outdoor unit model
GRXTH12BVJN
Number of zones
1
Max indoor units
not published
Rated cooling capacity
12,000 BTU/h[2]
Rated heating capacity
13,500 BTU/h[2]
Voltage
230 V[1]
MCA
not published - manufacturer specifies 15 A breaker
Maximum fuse or breaker size
15 A[1]
Breaker needed
15 A[1]
SEER2
19.5 SEER2[2]
EER2
11.3 EER2[2]
HSPF2 (Region 4)
10 HSPF2[2]
HSPF2 (Region 5)
not published
COP
not published
COP at 47F
not published
COP at 5F
1.8 COP[2]
Minimum outdoor heating temperature
-13 F[1]
Minimum outdoor cooling temperature
not published
Maximum outdoor temperature
not published
Indoor noise range
45/37/31/19 dB(A)[1]
Outdoor noise rating
50 dBA[1]
Indoor weight
19 lb[1]
Outdoor weight
75 lb[1]
Refrigerant
R-32[2]
Refrigerant charge
not published
Manufacturer coverage
not published
Line-set size
not published
Included line-set length
not published
Maximum line-set length
66 ft[1]
Max line set per indoor
not published
Maximum elevation difference
49 ft[1]
Max height between indoor units
not published
Wi-Fi support
supported[1]
Energy Star status
Not ENERGY STAR certified[3]
AHRI certification number
218672386[2]
Warranty
Registered: 10 yr parts / no separate compressor term (registration; complete Goodman warranty terms apply). Score uses Registered.. 10-year parts limited warranty with registration; complete Goodman warranty terms apply.
Install path
Professional install
Retail price
Installed quote only
Available retailers
not published
Manual links
AHRI public directory record 218672386, ENERGY STAR exact check 218672386, Goodman official literature library, Goodman 20 Series Line Up brochure, and Goodman Diagnostic Code Identification System search form, Goodman 20 Series Line Up ductless brochure CB-GDMN-DUCTLESS_06-26
Specification sheet
Goodman 20 Series Line Up ductless brochure CB-GDMN-DUCTLESS_06-26
Last sourced date
Jul 27, 2026

Electrical requirements

Show
Voltage
230 V[1]
Voltage range
208/230V[1]
Phase
1[1]
Frequency
60 Hz[1]
MCA
not published - manufacturer specifies 15 A breaker
Breaker needed
15 A[1]
Maximum breaker size
15 A[1]
Maximum fuse size
15 A[1]
Maximum cooling current
not published
Maximum heating current
not published
Manufacturer wire notes
not published

Installation considerations

Show
Liquid line
not published
Suction line
not published
Line connection type
not published
Precharged length
49 ft[1]
Included line-set length
not published
Maximum line-set length
66 ft[1]
Max line set per indoor
not published
Max height between indoor units
not published
Indoor dimensions
30 5/16 x 8 3/4 x 11 1/4 in[1]
Outdoor dimensions
26 3/8 x 11 3/16 x 21 15/16 in[1]
Indoor weight
19 lb[1]
Outdoor weight
75 lb[1]
Drain size
not published

Related systems and guides

Frequently asked questions

Can I install the Goodman 20 Series 12,000 BTU R-32 208/230V (GTXV12BVJN / GRXTH12BVJN) myself, or do I need a pro?
Goodman 20 Series 12,000 BTU R-32 208/230V (GTXV12BVJN / GRXTH12BVJN) 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 Goodman 20 Series 12,000 BTU R-32 208/230V (GTXV12BVJN / GRXTH12BVJN) keep heating in a cold winter?
The AHRI/ENERGY STAR certification lists 13,000 BTU/h of heating capacity at 5F. Rated heating operation extends down to -13 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 Goodman 20 Series 12,000 BTU R-32 208/230V (GTXV12BVJN / GRXTH12BVJN) need?
Published electrical requirements: 230 V voltage and 15 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 66 ft. The outdoor unit's factory charge covers up to 49 ft of line; longer runs need added refrigerant. Measure the planned routing before ordering.
What warranty does the Goodman 20 Series 12,000 BTU R-32 208/230V (GTXV12BVJN / GRXTH12BVJN) carry?
The manufacturer publishes these warranty tiers: Registered: 10 yr parts / no separate compressor term (registration; complete Goodman warranty terms apply). Score uses Registered.. Registration requirements and proof of qualified installation commonly affect coverage, so read the warranty terms before install day.

Data sources

Show
  1. Daikin Comfort Technologies North America, Inc.: Goodman 20 Series Line Up brochure GRXT18BVJN / GTXV18BVJNSourced - manufacturer technical document

    Covers Breaker needed, Frequency, Maximum breaker size, Maximum fuse size, Phase, Voltage and more

  2. Air-Conditioning, Heating, and Refrigeration Institute: AHRI Appendix M1 public detail for GRXTH18BVJN / GTXV18BVJNSourced - AHRI directory

    Covers AHRI certification number, performance_spec.cold_climate_designation, Rated cooling capacity, COP at 5F, EER2, Rated heating capacity and more

  3. U.S. Environmental Protection Agency ENERGY STAR: ENERGY STAR exact AHRI-reference check for 218672387Sourced - Energy Star listing

    Covers Energy Star status

Last updated

Jul 27, 2026