Mitsubishi Mr. Slim® 12,000 / 13,600 Btu/h Ductless Mini-Split System A/C & Heat Pump

Model MSZ-A12NA / MUZ-A12NA 17.0 SEER R-410A Inverter

Compact Powerful Outdoor Unit

Sleek Compact Indoor Unit

Digital Wireless Remote

  Price $1,741.00

Press the ADD TO CART button above to see a full list of accessories that may be purchased with this system.

Standard Features
The new R410A M-Series offers the following features:

  • Anti-allergy enzyme filter which uses artificial blue enzyme catalyst on the filter filaments to capture harmful microbes
  • Hybrid Catechin Pre-filter fibers infused with a bioflavinoid found in green tea that has antiviral and antioxidant properties
  • A-Control for unit wiring allows communication and power between outdoor and indoor units on three wires
  • Inverter-driven DC Compressor operates at high efficiency with outstanding reliability
  • Pulse Amplitude Modulation (PAM) Control aligns
    electrical input wave to improve electrical power factor up to 98%
  • Low-ambient Cooling allows for efficient operation with
    outdoor temperatures as low as 14° F for the inverter models
  • Powerful Mode provides 15 minutes of extra high-power cooling
  • Optional connection to wired remote control -MAC-3971IF-E connects to the M-Net - CITY MULTI Controls Network
  • Optional M-Net advanced system control -MAC-3991IF-E connects to the M-Net - CITY MULTI Controls Network
  • Plus: Econo-Cool mode, 1°F step temperature setting, self-diagnostic function, swing mode (up and down), auto restart, dry mode operation
  • Outdoor unit cabinets meet or exceed Florida Hurricane code for high wind load conditions.

Product Specifications

Application: A/C / Heat Pump (Cooling & Heating)
BTU Cooling: 12,000 (5.7 to 12.0)
BTU Heating: 13,600 (5.2 to 13.6)
BTU Heating @ 17 Degrees: 8,300
Mounting Location: Wall-mounted
SEER: 17.0
HSPF: 8.2
Indoor Unit: MSZ-A12NA
Control: Wireless Digital Remote Control (Included)
Indoor Input Power:
(V, PH, Hz)
208-230, 1 Phase, 60 Hz (Powered From Outdoor Unit)
Indoor Dimensions:
(In. HxWxD)
11-3/4 x 30-11/16 x 8-1/4
Indoor Weight:
Airflow Dry:
Airflow Wet:
Moisture Removal : 3.2 Pints Per Hour
Indoor Sound Level Cooling:
Indoor Sound Level Heating:
Outdoor Unit: MUZ-A12NA
Outdoor Input Power:
(V, PH, Hz, Amps)
208-230, 1 Phase, 60 Hz, 15 Amps
Outdoor Dimensions:
(In. HxWxD)
21-5/8 x 31-1/2 x 11-1/4
Outdoor Weight:
Pipe Size (Liquid):
Pipe Size (Gas):
Max Pipe Length / Differential 65 Ft. / 40 Ft.
Indoor Connection Method: FLARE
Outdoor Connection Method: FLARE

Limited Warranty: 7-years on compressor. 5-years on parts. Specifications are subject to change without notice.

Mr. Slim Goes National!


Mr. Slim TV commercials are running on 20 national cable television networks including A&E, Bravo, CNN, The Discovery Channel, Fox News, HGTV, Lifetime, Nick at Nite and The Weather Channel. Our three 60-second commercials balance humor and product information, addressing hot and cold spots, quiet operation and the advantages of not blocking the view with a window unit. Commercials are running night and day throughout the USA.

View the commercials! (avg. 4 MB)

  • War of the Window Unit!
  • The Sauna Kitchen!
  • The Wild West Wing!

    1° F Set Temperature Increments Offers more precise temperature control Offers improved individual control and comfort
    Hybrid Catechin Deodorizing Filter Deeply infused with a bioflavinoid found in green tea, filter fibers have antiviral and antioxidant properties Greatly improves Indoor Environmental Quality (IEQ) by reducing odors and bacteria
    Anti-allergy Enzyme Filter Created with an artificial blue enzyme catalyst on the filter filaments to capture harmful microbes Greatly improves Indoor Environmental Quality (IEQ) by reducing harmful allergens, germs and bacteria
    DC Inverter-driven Condenser Fan Motor Offers 60% greater efficiency than an equivalent AC motor Allows more efficient operation and lower energy usage
    Low-ambient Temperature Cooling Operation Provides cooling down to 14° F for applications with cooling needs even when it is cold outside Saves time and money, no low-ambient controls to add. The system has the flexibility to meet your temperature conditioning needs in all kinds of weather
    Optional Interface: MAC-397IF-E to PAR-21 MAA MAC-399IF-E to M-Net Provides the ability to tie M-Series product into the CITY MULTI® Controls Network (CMCN) Enables central control of all building HVAC systems and components
    Powerful Mode Provides 15 minutes of high-powered cooling Cools the space faster
    Auto changeover between heating Can automatically select cooling or heating operation as needed Maintains selected room temperature automatically
    Econo-Cool Mode Allows the set temperature to be 2° F higher without losing “comfort” Allows you to feel comfortable and also saves up to 20% in energy costs
    Additional Premium Features Self-diagnostic function, swing mode (up and down), auto restart, dry mode operation Really cool stuff
    PAM (Pulse Amplitude Modulation) Aligns electrical input waves so that 98% of power is used effectively Makes optimal use of energy and reduces consumer utility bills
    Magnet-wrapped DC Motor in Compressor Mitsubishi Electric developed manufacturing technique that offers high compressor motor density and high magnetic force Highly efficient and reliable compressor motor
    Magnetic Flux Vector Sine Wave Drive Converts the motor’s electrical wave- form to a sine wave (180 degree conductance) and raises the motor winding utilization ratio Reduces energy loss for higher efficiency
    Reluctance DC Rotary Compressor Produces a powerful magnetic torque Produces a more powerful torque which means more efficient operation and lower energy usage

    What is Mr. Slim Ductless Technology?

    For decades split-ductless air-conditioning systems have been the quiet solution for cooling and heating problems around the world. Our quiet and powerful Mr. Slim air-conditioning systems have three main components: an indoor evaporator unit, outdoor condensing unit, and remote controller. The units are easily connected by refrigerant lines, control and power wiring running through a small three-inch opening in the wall or ceiling.  The evaporator unit absorbs the room's heat and transfers that energy by the refrigerant, and the condensing unit discharges the heat energy outside.  This leaves a cold coil in the evaporator where a fan blows air accross this coil right into the space.  Ductless means there is no ductwork with Mr. Slim. The indoor evaporator is in the space being air conditioned rather than in an attic or closet space.  Installation is as simple for a trained HVAC technician as mounting the indoor and outdoor units, connecting the refrigerant lines, and making a few electrical connections. An easy installation for your contractor means you’ll be enjoying the comfort Mr. Slim provides faster.

    Why Mr. Slim?

    Mitsubishi Electric is the industry leader in split-ductless air conditioning. Our innovations have defined cutting-edge technology for years. Compare and you’ll find no other product surpasses Mr. Slim’s performance for quiet, easy-to-use, and energy efficient operation. And since our ductless technology carries the Mitsubishi Electric name, you know every unit is built to last. The bottom line is that Mr. Slim delivers the ultimate control of comfort for your home or office. It’s true today and will be comfortably evident for years to come.

    Where can Mr. Slim Be Used?

    Mitsubishi Electric Mr. Slim systems are the perfect solution for almost any cooling or heating situation. For example, our split-ductless systems can make an uncomfortably hot or cold zone in a building comfortable again. Perhaps you are remodeling or renovating an older home or business built before ducted air conditioning was available.
    Because there is no ductwork to run, Mr. Slim split-ductless systems are both plaster-wall and brick-facade friendly, so there’s no need to compromise the integrity of your home or office just to make each room comfortable. In addition, Mr. Slim systems are perfect for schools, universities, nursing homes, hospitals, restaurants, hotels, equipment rooms, office buildings, and churches. The versatility and variety of applications for Mr. Slim are virtually unlimited. If a room is too hot or cold, Mr. Slim can handle it!


    Always use a licensed installer or contractor to install this product. Do not try to install the product yourself. Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion.

    Use only those parts and accessories supplied or specified by Mitsubishi. Ask a licensed installer or contractor to install those parts and accessories. Use of unauthorized parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage, electrical shock, fire or explosion.

    Read the Users Manual carefully before using this product. The Users Manual provides important safety instruction and warnings. Be sure to follow these instructions and warnings.

    Full Install Kit and Accessories Available
    Press the Buy One Now Button to Review.

 Back To Top

  Price $1,741.00
Buy Now

Press the Buy Now button above to see a full list of accessories that may be purchased with this system.