Trane / ML Series R-410A
Trane ML 12k R-410A 115V Mini-Split
The Trane ML 12k is the 1-ton version of the same legacy line: the Trane badge on a 115V circuit, but an R-410A system that AHRI lists as "Production Stopped." It certifies at SEER2 20 with a low EER2 of 9.9, and - unlike the 9k - this model is not ENERGY STAR certified. It is a closeout-era unit, sensible only at a closeout price.
Need this installed?
Get installation quotes
Image: Trane
- Last sourced
- Jul 23, 2026
SplitAtlas score
7.9 / 10
(20.0 SEER2) among 12k systems
(9.2 HSPF2) among 12k systems
(47.5% heat retained at 5F; -4 F heating floor) among 12k systems
(-45 dBA indoor min / 51 dBA outdoor) among 12k systems
(3 verified features) across the catalogue
(17 manuals; spec sheet; 10 error-code rows) 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
Best-fit use cases
A buyer who wants the Trane name at a closeout price on 115V for a mild climate, and does not need ENERGY STAR eligibility or a future-proof refrigerant.
Buyer review snapshot
Install difficulty
- Electrical: 115V; MCA 14 A; breaker/fuse 15 A.
- Line set: connection type not sourced; max 65 ft.
Alternatives
- Daikin ATMOSPHERA 12,000 BTU R-32 208/230V (FTXM12WVJU9 / RXM12WVJU9)
9.0 score / 12k / SEER2 25.2 / -13 F heating floor / 208/230V
Exact destination at HVACDirect: $2,848.00, checked Jul 23, 2026
- Blueridge XS6 Max Efficiency 12,000 BTU R-454B 208/230V (BXS6A12WM0 / BXS6A12UC0)
8.9 score / 12k / SEER2 29.4 / -22 F heating floor / 230V
Exact destination at Alpine Home Air: $1,979.00, checked Jul 24, 2026
- Senville ELITE 12,000 BTU R-454B 208/230V (SENE-12EL-IHH / SENE-12EL-OH)
8.9 score / 12k / SEER2 29.4 / -22 F heating floor / 187-253V
Exact destination at Senville: $1,699.99, checked Jul 24, 2026
Availability and price context
We could not verify a current retail price for this model. We could not find this exact model in stock at a retailer we work with when we last checked on 2026-07-23.
Source date
- Model data sourced
- Jul 23, 2026
- Page reviewed
- Jul 23, 2026
- Source-backed records
- 3
- Newest source retrieved
- Jul 23, 2026
Strengths
- The Trane name and dealer network on a standard 115V circuit.
- SEER2 20 seasonal cooling efficiency.
Weaknesses
- R-410A on a "Production Stopped" line - on the wrong side of the refrigerant transition, with rising future service-refrigerant cost.
- NOT ENERGY STAR certified, and a weak EER2 9.9 for peak-summer load.
- Rated only to -4F; professional installation required.
Climate suitability
- Minimum heating ambient
- -4 F[1]
- Rated heating at 5F
- 5,800 BTU/h[2]
- Rated heating at 17F
- 7,600 BTU/h[2]
- Rated heating at 47F
- 12,200 BTU/h[2]
Specifications
ShowHide
- Manufacturer
- Trane
- Brand
- Trane
- Product line
- ML Series R-410A
- Model number
- NTXWMT12A111AA indoor / NTXSMT12A111AA outdoor
- Indoor unit model
- NTXWMT12A111AA
- Outdoor unit model
- NTXSMT12A111AA
- Number of zones
- 1
- Max indoor units
- not published
- Rated cooling capacity
- 12,000 BTU/h[2]
- Rated heating capacity
- 12,200 BTU/h[2]
- Voltage
- 115 V[1]
- MCA
- 14 A[1]
- Maximum fuse or breaker size
- 15 A[1]
- Breaker needed
- not published
- SEER2
- 20 SEER2[2]
- EER2
- 9.9 EER2[2]
- HSPF2 (Region 4)
- 9.2 HSPF2[2]
- HSPF2 (Region 5)
- not published
- COP
- not published
- COP at 47F
- 3.61 COP[1]
- COP at 5F
- 2.33 COP[2]
- Minimum outdoor heating temperature
- -4 F[1]
- Minimum outdoor cooling temperature
- 14 F[1]
- Maximum outdoor temperature
- 115 F[1]
- Indoor noise range
- 22-45 dB(A)[1]
- Outdoor noise rating
- 51 dBA[1]
- Indoor weight
- 22 lb[1]
- Outdoor weight
- 73 lb[1]
- Refrigerant
- R-410A[1]
- Refrigerant charge
- 28 oz[1]
- Manufacturer coverage
- not published
- Line-set size
- 1/4 in liquid / 3/8 in suction
- Included line-set length
- Trane/METUS professional-install submittals publish refrigerant line sizes, precharged length, and maximum piping limits, but no included line set.
- Maximum line-set length
- 65 ft[1]
- Max line set per indoor
- not published
- Maximum elevation difference
- 40 ft[1]
- Max height between indoor units
- not published
- Wi-Fi support
- supported[1]
- Energy Star status
- Not ENERGY STAR certified[2]
- AHRI certification number
- 202397888[2]
- Warranty
- not published
- Install path
- Professional install
- Retail price
- We could not find this exact model in stock at a retailer we work with when we last checked on 2026-07-23.
- Available retailers
- not published
- Manual links
- AHRI certificate 202397888, AHRI public detail 202397888, ENERGY STAR exact-search no-match record, Trane NTXWMT09-12A111A installation manual, Trane 18 SEER Wall Mount ML manufacturer page, Trane Single-Zone Heat Pump ML manufacturer page, Trane warranty and registration page, HVACDirect Trane ML search outcomes, Trane MyLinkDrive NTXWMT-A111A(B) Service Manual, Section 9 Troubleshooting, Trane NTXSMT09-12A111AA outdoor service manual, Trane NTXWMT-A111A/B indoor service manual, Trane ML source manifest, Trane ML 12,000 BTU extracted submittal text fixture source, Trane ML 12,000 BTU submittal NTXWMT12A111AA / NTXSMT12A111AA, Trane NTXSMT09-12A111AA technical databook, Trane NTXWMT09-12A111AA technical databook, Trane NTXWMT09-12A111A operation manual
- Specification sheet
- Trane ML 12,000 BTU extracted submittal text fixture source
- Last sourced date
- Jul 23, 2026
Installation considerations
ShowHide
- 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
- Trane/METUS professional-install submittals publish refrigerant line sizes, precharged length, and maximum piping limits, but no included line set.
- Maximum line-set length
- 65 ft[1]
- 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 in[1]
- Outdoor dimensions
- 31-1/2 x 11-1/4 x 21-5/8 in[1]
- Indoor weight
- 22 lb[1]
- Outdoor weight
- 73 lb[1]
- Drain size
- 5/8 in[1]
Related systems and guides
- More Trane systems
- TOSOT comparison model
- GE Appliances comparison model
- Trane 9k model
- Toshiba Carrier 26 High Wall 12k 230V
- Guide library
- Mini split buying guide
- Single-zone vs multi-zone mini splits
- Troubleshooting
- The best 12,000 BTU mini splits of 2026
- The best DIY mini splits of 2026
- What "DIY mini split" actually means
- How to install a mini split (DIY overview)
- Mini split for a hot upstairs
- Mini splits for an ADU or tiny home
- Do mini splits use gas or electric?
- Mini splits for a pole barn or metal building
- Questions to ask a mini split installer before you hire
- Mini split remote not working
- Mini split Wi-Fi not connecting
- Mini split lights blinking
- Mini split indoor unit freezing up
- Line sets
- Line-set covers
Frequently asked questions
- Can I install the Trane ML Series 12,000 BTU R-410A 115V (NTXWMT12A111AA / NTXSMT12A111AA) myself, or do I need a pro?
- Trane ML Series 12,000 BTU R-410A 115V (NTXWMT12A111AA / NTXSMT12A111AA) 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 Trane ML Series 12,000 BTU R-410A 115V (NTXWMT12A111AA / NTXSMT12A111AA) keep heating in a cold winter?
- The manufacturer publishes 5,800 BTU/h of heating output at 5F. Rated heating operation extends down to -4 F. Certified heating efficiency is 9.2 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 Trane ML Series 12,000 BTU R-410A 115V (NTXWMT12A111AA / NTXSMT12A111AA) need?
- Published electrical requirements: 115 V voltage, 14 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. Longer runs than the included set allows typically mean added refrigerant and a pro visit, so measure the planned routing before ordering.
Data sources
ShowHide
- Mitsubishi Electric Trane HVAC US LLC: NTXWMT12A111AA & NTXSMT12A111AA Trane ML Series submittalSourced - manufacturer technical document
Covers Frequency, electrical_spec.guaranteed_voltage_range, electrical_spec.indoor_mca_amps, Maximum breaker size, Maximum fuse size, Minimum circuit ampacity and more
- Air-Conditioning, Heating, and Refrigeration Institute: AHRI public detail 202397888 for NTXWMT12A111AA / NTXSMT12A111AASourced - AHRI directory
Covers AHRI certification number, Rated cooling capacity, COP at 5F, EER2, Energy Star status, Rated heating capacity and more
- Trane Residential: Single-Zone Heat Pump ML manufacturer pageSourced - manufacturer product page
Covers system.lifecycle_status
Last updated
Jul 23, 2026