M-Series (Mr. Slim)

For more than three decades, the Mitsubishi M-Series (Mr. Slim) has been improving comfort in homes all over the world. Now with the newest innovations, any space can be transformed with quiet, easy-to-use and energy-efficient cooling and heating systems that deliver ultimate comfort.

No two environments are alike. Whether you spend time in a house, a condo, a cottage or even a small office, each design, each floor plan, and each room offers its own challenge to something as important as proper heating, air conditioning and circulation. Mitsubishi Electric Mr. Slim systems are designed to adapt to these challenges. And even better, we offer more systems than ever that meet Energy Star standards.

Reliable, easy to install, and extremely quiet, the revolutionary design and innovative technology of the Mr. Slim M-series are perfect for any situation. Our systems can also provide excellent heating performance even when outdoor temperatures drop down below zero degrees Fahrenheit! As a premium heating and cooling system, Mr. Slim can operate ductless or be installed through modest concealed ductwork. Either way, you can be sure to expect quiet operation and years of satisfaction.


Mr. Slim is best known as the perfect solution for dwellings without existing ductwork. The powerful simplicity of an indoor and outdoor unit connected by two refrigerant lines that run through a small 4 inch opening in the wall or ceiling is both effective and cost efficient. Mitsubishi Electric also introduced the convenient option of using a ducted indoor unit as well. By using compact ductwork connected to a ceiling concealed indoor unit, Mr. Slim can deliver its efficient temperature control in a truly discreet manner. An innovative fan-blade design and grill shape in our outdoor unit makes the M-series system one of the quietest on the market. Our systems are available in sizes from 6,000 to 48,000 BTU/h, offering one of the widest selections in the industry. In fact, with our newest model, you can even install up to 8 indoor units to a single outdoor unit, keeping exterior installation space to a minimum.


Mitsubishi Electric systems operate at low sound levels. M Series indoor units produce decibels barely at a whisper level. Compare to other common sounds:

Ambulance siren
Circular saw
Vacuum cleaner
Normal conversation
Our indoor units
120 decibels
110 decibels
80 decibels
60 decibels
30 decibels
19-34 decibels*

Did you hear that? We hope you did.

Source: National Institute for Occupational Safety and Health
*Smallest to largest capacity indoor unit at low speed

For more information on the Y-SERIES, please visit the Mitsubishi Link Drive web site.

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