Bulkhead Air Conditioners

Low static bulkhead units designed to heat and cool a room through a short, straight duct run. The SEZ-M can be installed in the ceiling or concealed behind a bulkhead.

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SEZ-M Series

Bulkhead Air Conditioners

SEZ-M Series


  • Capacity Range: 2.5 – 7.1 kW
  • Impressively quiet
  • Low profile installation
  • External Static Pressure 5 to 50 Pa
  • Discreet design
  • R32 refrigerant
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Providing the perfect solution for homes where wall space is at a premium, our bulkhead air conditioners are tailored specifically for homes and offices with limited space. The low height of these units allows them to be installed in a ceiling bulkhead. With its compact design, you’ll hardly notice where your air conditioner is while benefiting from its cosy ambience or the cool breeze it provides.

Designed for Discretion

Understanding the need for seamless integration in modern interiors, our bulkhead air conditioners are crafted to be discreetly installed either in the ceiling or behind a bulkhead. With a height of just 200 mm, these units can be installed in homes with low ceiling space where other ducted systems are too big to fit. The low profile also makes them ideal for bulkhead installation in living/family rooms, apartments or above a wardrobe. Only the air intake and outlet grilles are visible allowing these units maintain the clean lines of your interior decor, ensuring that comfort doesn’t come at the expense of design.

Whisper-quiet Operation

Comparable to the soft and quiet rustling of leaves, you can enjoy a tranquil environment, without being disturbed by the sound of your air conditioner, thanks to the impressively quiet operation of these designs. With noise levels registering at a mere 23dBA, these air conditioners operate at a whisper, ensuring that your peace remains undisturbed. Whether you’re engrossed in a book, meditating, enjoying a moment of calm or simply hard at work, our bulkhead air conditioners will free you from the typical distractions of louder units.

Level up your air quality

The SEZ-M Series bulkhead system are compatible with the optional Plasma Quad Connect (part no. MAC-100FT-E), an innovative, bolt-on high-grade filtration system with proven results in inhibiting airborne influenza virus particles, dust, mould and other inhalable particles down to PM2.5.

If you need to remove airborne contaminants that trigger allergic reactions, the Plasma Quad Connect filtration option is worth considering. The Plasma Quad Connect for SEZ-M requires a fitment component (PAC-HA11PAR).

Mitsubishi Electric: Air Conditioning Experts

Mitsubishi Electric commitment to quality and innovation is evident in the SEZ-M Series bulkhead air conditioners. With a focus on providing solutions that are high performing, energy efficient and reliable, Mitsubishi Electric continues to be a trusted name in air conditioning. Whether it’s the quiet operation, the efficient cooling, or the discreet design, the SEZ-M Series is a testament to dedication to excellence by Mitsubishi Electric.

With a rich history spanning nearly 50 years in Australia, Mitsubishi Electric remains at the forefront of the air conditioning industry. Our bulkhead air conditioners are proof of our unwavering commitment to innovation, quality, and customer satisfaction. Whether you’re looking to retrofit an older building or design a new space, our range of air conditioners offers solutions that cater to the diverse needs of all customers.

Explore our other ranges of residential air conditioners below:

  • Wall-mounted air conditioners: Renowned for their ease of installation and maintenance, these units are a popular choice for a wide range of spaces.
  • Ducted air conditioners: Perfect for whole home comfort, these systems use ducts to distribute conditioned around the house, ensuring comprehensive climate control.
  • Multi-head split system air conditioners: Ideal for homes with varied cooling or heating needs, these systems connect multiple indoor units to a single outdoor unit.
  • Ceiling cassette air conditioners: These units, installed in the ceiling, ensure even air distribution, making them suitable for spaces with limited wall or floor space.
  • Floor console air conditioners: Popular choice in colder regions, these units introduce heating at floor level, ensuring effective temperature control. The compact design of these units allows them to be installed underneath windows.


Bulkhead air conditioners operate by drawing indoor air in, conditioning it through a filter, and then distributing the cooled or heated air through grilles. This design allows for the main unit to be discreetly hidden, with only the grilles visible.

Mitsubishi Electric offers multiple control options, including the PAR-41MAA wall mounted controller for detailed settings. Additionally, with the optional Wi-Fi adapter, you can control your unit remotely via a smartphone or tablet. Some Wi-Fi controls even allow you to connect your air conditioner to smart assistants such as Google Assistant or Amazon Alexa, creating a seamless integration for smart home households.

*1 Optional Wi-Fi adapter required per unit (excludes LN Series due to built-in capabilities).
Requires an Internet connection and the App downloaded from the App Store or Google Play Store on your smartphone or tablet with the latest Operating System available.
*2 To use Amazon Alexa to control your air conditioner, you will need an Amazon Alexa Echo device.
*3 To use Google Assistant to control your air conditioner, you will need a Google Home smart speaker.

While the design of the bulkhead air conditioners allows for discreet installation, it’s essential to have them installed by professionals who have appropriate electrical and refrigeration licenses. An air conditioning specialist can advise you on the right size of unit you need (measured in kW capacity) for your home.

Mitsubishi Electric bulkhead air conditioners are available through our extensive network of authorised dealers and retailers across the country. You can find a stockist near you or request a quote online for more details.