Mitsubishi Electric / M-Series GS
Mitsubishi Electric M-Series GS Hyper-Heating 12k 230V (MSZ-GS12NA / MUZ-GS12NAHZ)
Model data is drawn from manufacturer, retailer, and certification sources. Missing specifications remain marked as not published.
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Data completeness: 100%
- Last verified
- Jul 20, 2026
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1. Summary
Mitsubishi Electric M-Series GS Hyper-Heating 12k 230V (MSZ-GS12NA / MUZ-GS12NAHZ) has source-backed specifications below, with unavailable values clearly marked as not published.
Rated cooling
12,000BTU/hVerified - manufacturer technical document
Rated heating
12,300BTU/hVerified - manufacturer technical document
2. Best-fit use cases
not published
3. Key specifications
- Manufacturer
- Mitsubishi Electric
- Brand
- Mitsubishi Electric
- Product line
- M-Series GS
- Model number
- MSZ-GS12NA-U1 indoor / MUZ-GS12NAHZ-U1 outdoor
- Indoor unit model
- MSZ-GS12NA-U1
- Outdoor unit model
- MUZ-GS12NAHZ-U1
- Number of zones
- 1
- Max indoor units
- not published
- Rated cooling capacity
- 12,000 BTU/hVerified - manufacturer technical document
- Rated heating capacity
- 12,300 BTU/hVerified - manufacturer technical document
- Voltage
- 208/230VVerified - manufacturer technical document
- MCA
- 10 AVerified - manufacturer technical document
- Maximum fuse or breaker size
- 15 AVerified - manufacturer technical document
- Breaker needed
- not published
- SEER2
- 21.7 SEER2Verified - AHRI directory
- EER2
- 13.05 EER2Verified - AHRI directory
- HSPF2 (Region 4)
- 9.6 HSPF2Verified - AHRI directory
- HSPF2 (Region 5)
- not published
- COP
- not published
- COP at 47F
- 4.34 COPVerified - manufacturer technical document
- COP at 5F
- 1.84 COPVerified - manufacturer technical document
- Minimum outdoor heating temperature
- -13 FVerified - manufacturer technical document
- Minimum outdoor cooling temperature
- 14 FVerified - manufacturer technical document
- Maximum outdoor temperature
- 115 FVerified - manufacturer technical document
- Indoor noise range
- cooling 19-22-30-37-45; heating 19-22-30-37-43Verified - manufacturer technical document
- Outdoor noise rating
- 51 dBAVerified - manufacturer technical document
- Indoor weight
- 23 lbVerified - manufacturer technical document
- Outdoor weight
- 85 lbVerified - manufacturer technical document
- Refrigerant
- R-410AVerified - manufacturer technical document
- Refrigerant charge
- 41 ozVerified - manufacturer technical document
- Manufacturer coverage
- not published
- Line-set size
- 1/4 in liquid / 3/8 in suction
- Included line-set length
- Line set supplied by the installer
- Maximum line-set length
- 65 ftVerified - manufacturer technical document
- Max line set per indoor
- not published
- Maximum elevation difference
- 40 ftVerified - manufacturer technical document
- Max height between indoor units
- not published
- Wi-Fi support
- supportedVerified - manufacturer technical document
- Energy Star status
- certifiedVerified - manufacturer technical document
- AHRI certification number
- 207679253Verified - AHRI directory
- Warranty
- 5 years parts / 7 years compressor. Standard residential M-Series warranty is 5 years parts and 7 years compressor from installation by a licensed HVAC contractor. Enhanced residential terms are 10 years parts and compressor for an owner-occupied residence registered within 90 days of installation, and 12 years parts and compressor when installed in an owner-occupied residence by a Diamond Contractor and registered by that Diamond Contractor within 90 days. The limited warranty statement itself requires licensed-contractor installation and does not state an Internet/resale purchase-channel condition.
- DIY installation status
- Professional install
- Retail price
- Dealer-distributed; no published consumer price
- Installation type
- Professional install
- Available retailers
- not published
- Manual links
- MUY(Z)-GS engineering data book, MSY(Z)-GS06-15NA installation manual, METUS Residential M-Series, P-Series and SMART MULTI Limited Warranty Statement, MSZ-GS indoor service manual, MUY(Z)-GS outdoor service manual, MSZ-GS12NA & MUZ-GS12NAHZ submittal
- Specification sheet
- MSZ-GS12NA & MUZ-GS12NAHZ submittal
- Last verified date
- Jul 20, 2026
4. Strengths
not published
5. Weaknesses
not published
6. Climate suitability
- Minimum heating ambient
- -13 FVerified - manufacturer technical document
- Rated heating at 5F
- not published
- Rated heating at 17F
- 7,600 BTU/hVerified - manufacturer technical document
- Rated heating at 47F
- 12,300 BTU/hVerified - manufacturer technical document
7. Electrical requirements
- Voltage
- not published
- Voltage range
- 208/230VVerified - manufacturer technical document
- Phase
- 1Verified - manufacturer technical document
- Frequency
- 60 HzVerified - manufacturer technical document
- MCA
- 10 AVerified - manufacturer technical document
- Breaker needed
- not published
- Maximum breaker size
- not published
- Maximum fuse size
- 15 AVerified - manufacturer technical document
- Maximum cooling current
- not published
- Maximum heating current
- not published
- Manufacturer wire notes
- 14 AWG indoor-outdoorVerified - manufacturer technical document
8. Installation considerations
- Liquid line
- 1/4 inVerified - manufacturer technical document
- Suction line
- 3/8 inVerified - manufacturer technical document
- Precharged length
- 25 ftVerified - manufacturer technical document
- Included line-set length
- Line set supplied by the installer
- Maximum line-set length
- 65 ftVerified - manufacturer technical document
- Max line set per indoor
- not published
- Max height between indoor units
- not published
- Indoor dimensions
- 31-7/16 x 9-1/8 x 11-5/8 inVerified - manufacturer technical document
- Outdoor dimensions
- 31-1/2 x 11-1/4 x 21-5/8 inVerified - manufacturer technical document
- Indoor weight
- 23 lbVerified - manufacturer technical document
- Outdoor weight
- 85 lbVerified - manufacturer technical document
- Drain size
- 5/8 inVerified - manufacturer technical document
9. Operating-cost estimate
not published
10. Comparable models
not published
Frequently asked questions
- Can I install the Mitsubishi Electric M-Series GS Hyper-Heating 12k 230V (MSZ-GS12NA / MUZ-GS12NAHZ) myself, or do I need a pro?
- Mitsubishi Electric M-Series GS Hyper-Heating 12k 230V (MSZ-GS12NA / MUZ-GS12NAHZ) 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 Mitsubishi Electric M-Series GS Hyper-Heating 12k 230V (MSZ-GS12NA / MUZ-GS12NAHZ) keep heating in a cold winter?
- Rated heating operation extends down to -13 F. Certified heating efficiency is 9.6 HSPF2. Match that published heating floor against your climate's design temperature - below the low-ambient rating, output can fall off or the system can pause to protect itself.
- What electrical circuit does the Mitsubishi Electric M-Series GS Hyper-Heating 12k 230V (MSZ-GS12NA / MUZ-GS12NAHZ) need?
- Published electrical requirements: 208/230V voltage, 10 A minimum circuit ampacity, 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 65 ft, and the included line set comes pre-charged for 25 ft. Longer runs than the included set allows typically mean added refrigerant and a pro visit, so measure the planned routing before ordering.
- What warranty does the Mitsubishi Electric M-Series GS Hyper-Heating 12k 230V (MSZ-GS12NA / MUZ-GS12NAHZ) carry?
- The manufacturer publishes 5 years parts coverage and 7 years compressor coverage. Registration requirements and proof of qualified installation commonly affect coverage, so read the warranty terms before install day.
11. Data sources
- Mitsubishi Electric Trane HVAC US: MSZ-GS12NA & MUZ-GS12NAHZ submittalVerified - manufacturer technical document
Covers Frequency, electrical_spec.guaranteed_voltage_range, electrical_spec.indoor_mca_amps, Maximum fuse size, Minimum circuit ampacity, Phase and more
- AHRI: AHRI Directory Air-Source Heat Pumps record ref 207679253Verified - AHRI directory
Covers AHRI certification number, EER2, HSPF2 (Region 4), SEER2
- Mitsubishi Electric Trane HVAC US: Residential M-Series, P-Series and SMART MULTI Split Air Conditioner and Heat Pump Systems Limited Warranty StatementVerified - manufacturer technical document
Covers Compressor warranty, Parts warranty, Warranty notes
12. Last updated date
Jul 20, 2026