LENNOX M1WD 1-Way Ceiling Cassette 18,000 BTU

An invisible and silent solution for optimal comfort in residential and commercial applications

At AirGreen , we know that choosing an air conditioning and heating unit is not just about performance: aesthetics, silence, and energy efficiency are just as crucial. That's why we offer the LENNOX M1WD 18000 BTU Unidirectional Cassette , a high-end product designed to meet the demanding needs of our customers in Montreal, Laval, Longueuil, on the North Shore and the South Shore .

Personalized comfort thanks to "Calm Air" technology

The LENNOX M1WD cassette is distinguished by its “ Calm Air ” technology. When activated, this function distributes air through thousands of micro-holes located on the surface of the device, ensuring a soft and homogeneous diffusion . The air propagates at a speed of less than 30 fpm, according to ASHRAE definitions , which makes the air current imperceptible to the occupants. It is an ideal solution for offices, bedrooms or waiting rooms, where silence and comfort are paramount.

Key technical features

• Cooling capacity: 18,000 BTU

• Freon R-32 : more efficient, less polluting

• Compact dimensions : 55.5 x 19.63 x 7.13 in

• Ultra-low noise level : 31 / 42 dB(A)

• Piping : 1/4 - 1/2

• Easy installation thanks to flare connections

• Integrated drainage pump for efficient condensation removal

• Cross-flow fan with backward-curved blades, reducing noise levels and air resistance

Compact and quiet design

The M1WD cassette's galvanized steel housing is designed for discreet ceiling installation , while providing easy access to electrical connections and the drainage system. Its slim design allows for seamless integration into a variety of environments, from a boardroom in Longueuil to a modern condo in Montreal .

Simplified HVAC Maintenance

A built-in air filter captures particles as small as one micron. This filter is washable and reusable, making HVAC maintenance easier and reducing long-term costs for the customer. The filter cleaning indicator provides a visual reminder on the control panel.

Smart home automation compatibility

Remote control by Wi-Fi with a mobile app, depending on the controller chosen. You can control the temperature, adjust settings, or create custom automations. The system even allows for geofencing detection , automatically shutting off the machine as soon as you leave the house, for increased energy efficiency .

Advanced Controls: State-of-the-art remote controls

Three remote control options are available: wireless, touchscreen, and programmable wired. Each interface provides full access to cassette functions, such as:

• AI Auto mode (intelligent mode)

• Turbo mode for fast refreshment

• Calm Air Mode

• Purify mode to improve ambient air quality

• Advanced time programming (off-peak hours, extended absence)

Real applications by AirGreen

We have installed several M1WD cassettes in offices in Laval , clinics in Brossard , and showrooms in Terrebonne . Customers highlight the discreet sound , ease of maintenance , and intuitive management via the mobile application . One of our commercial customers in Saint-Lambert particularly appreciates the "Calm Air" function , which he finds perfect for maintaining a stable temperature without feeling a direct blast of air on his employees.

Guarantee and reliability

The unit is backed by a warranty of 7 years on the compressor and 6 years on parts , as well as a 6-year legal warranty (parts and labour), and controllers and accessories come with a one-year warranty . This enhances system reliability , a key consideration for residential and commercial customers looking for a long-lasting investment.

Why choose AirGreen for your HVAC installation?

With our field experience throughout Greater Montreal , we guarantee a compliant , fast, and uncompromising HVAC installation. At AirGreen, no payment is required until the work is completed , a transparency that reassures our customers. In addition, our certified technicians ensure the optimization of every detail : distance from the wall, condensate management, airflow optimization, Wi-Fi configuration.

Conclusion

The LENNOX M1WD 18000 BTU Unidirectional Cassette embodies a smart, quiet, and efficient solution for modern buildings. It combines advanced technology, minimalist aesthetics, and energy efficiency . It is a strategic choice for demanding residential and commercial projects from Montreal to the South Shore .

Contact us today for a free estimate or to schedule a custom HVAC installation with AirGreen.

Warranty: 7 years on the compressor and 6 years on parts. 6-year legal warranty of good working order on parts and labour (Consumer Protection Act, since October 5, 2026), backed by AirGreen and LENNOX. It does not cover routine maintenance, including cleaning and washing the unit, which remains the customer's responsibility, nor damage caused by abusive use. Regular maintenance following LENNOX's instructions is strongly recommended.