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12,000 BTU 26.1 SEER Wall Mounted Mitsubishi Mini-Split FS Single Zone Heat Pump - MZ-FS12NA







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AHRI Number: 201754298

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Designed with enhanced efficiency and supreme comfort, the Mitsubishi MSZ-FS12NA / MUZ-FS12NA single-zone mini-split is an ideal wall mounted unit to heat and cool a single room of your home or office. With its enhanced sensors and automatic intelligent controls, the MSZ-FS12NA / MUZ-FS12NA is considered a superior unit from a superior manufacturer.


  • Designed to be able to heat and cool a medium-sized room in average climates
  • 12,000 BTU, 26.1 SEER wall mounted mini-split
  • Built-in I-SEE sensor and auto-controlled outlet vanes
  • Energy Star certified
12,000 BTU, 26.1 SEER

At an output of 12,000 BTU and an efficiency rating of 26.1 SEER, Mitsubishi designed the MSZ-FS12NA / MUZ-FS12NA to be a good suit for any medium-sized rooms in ideal climate conditions. With a higher efficiency over many other options, this unit is efficient enough Energy Star certified.


Mitsubishi provides a 5 year parts and 7 year compressor warranty out of the box. When the unit is installed following your state and local codes and is registered online through the manufacturer, the warranty is upgraded to a 10 year parts and compressor warranty.

Reliable Functionality

The Mitsubishi MSZ-FS12NA / MUZ-FS12NA will provide heat down as low as a -4°F outdoor temperature, reliably providing warmth to the room it is covering year-round in mild climates. For a Hyper Heat pump system that warms down to -13°F with otherwise the same system specifications, click here.

Ease of Comfort

The Mitsubishi MSZ-FS12NA / MUZ-FS12NA mini-split comes with an IR remote in the box so that the unit can be controlled anywhere in the room. With the Kumo Cloud, a Mitsubishi-branded WiFi mini-split adapter found here, conveniently providing you access to the unit’s controls from anywhere in the world as long as you have Internet access through the app.

Intelligent Controls

The Mitsubishi MSZ-FS12NA / MUZ-FS12NA is engineered to perfection in its intelligent automated temperature controls. The Mitsubishi MSZ-FS12NA / MUZ-FS12NA is designed to automatically ramp up and down depending on your room’s cooling needs in order to keep a stable temperature. Moreover, the system is built with an integrated I-SEE sensor, which constantly measures temperatures in different points in the room to change the direction of air flow as needed. Effectively, this feature allows the unit to focus its efforts on the part of the room that needs heat or cooling the most, keeping a much more stable temperature in the room than units without the I-SEE sensor. With all of these enhanced comfort features, the MSZ-FS12NA / MUZ-FS12NA definitely lives up to Mitsubishi’s superior standards.

Product Specifications

More Information
12,000 BTU 26.1 SEER Wall Mounted Mitsubishi Mini-Split FS Single Zone Heat Pump - MZ-FS12NA
Refrigerant Charge Pre-Charged For: 25'
Weight (in lbs) 116.000000
AHRI Certificate Number 201754298
Brand/Manufacturer Mitsubishi
Controller Wireless Included
Additional Information Heat Pump
Additional Information Maximum Line Set Length: 65'
Additional Information Drain: 5/8"
HSPF 12.5
Cooling BTU 12,000 BTU
Heating BTU 13,600 BTU
Maximum CFM 117-398 CFM
Decibel Level (dBA) Indoor Unit: 21-42 | Outdoor Unit: 49-51
Energy Star Yes
Refrigerant R410A
Capacity Dehumidification Rate: 0.38 gal/hr
SEER1 (Efficiency) 26-30
EER 13.8
Liquid Line 1/4"
Suction Line 3/8"
Electrical 208/230V 1 Phase 60 Hz
Max Breaker Size 15
Min. Breaker Size 11
Amperage Requirement 15
BTU/Tonnage 12,000 BTU/1 Ton
Mini-Split Type Wall Mounted
Min/Max Outdoor Temp for Heating -13°-75°
Min/Max Outdoor Temp for Cooling 14°-115°
Zone Compatibility Single Zone
Operating Mode Cooling, Heating
Height Indoor Unit: 12-11/16" | Outdoor Unit: 21-5/8"
Width Indoor Unit: 36-7/16" | Outdoor Unit: 31-1/2"
Depth Indoor Unit: 9-3/16" | Outdoor Unit: 11-1/4"
Additional Info Indoor Unit Weight: 34 lbs | Outdoor Unit Weight: 89 lbs
Warranty 10 Years with Online Registration
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
Safety Information PROPOSITION 65 WARNING

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Questions and Answers

Customer Questions
Is Mitsubishi MSZ-FS series identical to the discontinued MSZ-FH series?
These are very similar. Refer to the spec sheets for the small differences. If you have any further questions, please call us 888-785-3024 and we will be happy to assist you.
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