CANAIR 4CDH R-454B "ADD-ON" Central Heat Pump | 360,000 BTU - Cased Coil

• BROCHURE

An ADD-ON central heat pump designed for the concrete realities of Quebec

At AirGreen , we have been installing central heat pump systems for over 15 years in extremely varied contexts: single-family homes in Montreal, duplexes and triplexes in Laval, multi-unit buildings in Longueuil, light commercial buildings on the South Shore, and detached properties on the North Shore. This field experience has taught us one essential thing: a good HVAC system is not just efficient on paper; it must be adapted to the climatic, architectural, and electrical realities of the building .

The CANAIR 4CDH R-454B | 360,000 BTU "ADD-ON" Central Heat Pump perfectly embodies this principle. It's a high-efficiency central system designed to operate down to -30°C , while seamlessly integrating into an existing installation. Its ADD-ON approach allows for a dramatic improvement in a building's energy efficiency without requiring a complete overhaul of the HVAC system.

In practice, this model is aimed as much at homeowners wishing to modernize their heating as at property managers looking for a reliable, sustainable and cost-effective solution.

Understanding the ADD-ON approach: a realistic and effective HVAC strategy

Intelligent integration into the existing system

An ADD-ON central heat pump is not simply a replacement. It acts as a primary heating and cooling source , while also working in conjunction with an existing electric furnace or supplemental heating element. This configuration allows for:

• to use the heat pump as the primary source for the majority of the year;

• to limit the use of electrical components to periods of extreme cold;

• to retain the existing air ducts and HVAC architecture;

• to reduce structural work and disruptions to occupancy.

In Montreal and dense urban areas, this approach is often the most sensible, both technically and financially.

A particularly relevant solution for existing buildings

In many projects completed by AirGreen in Laval and Longueuil, the buildings did not allow for a complete conversion to a fully electric central system without major modifications. The CANAIR 4CDH ADD-ON model made it possible to maximize energy efficiency while respecting the existing building constraints, particularly in terms of electrical capacity and mechanical space.

Thermal performance adapted to Quebec winters

Stable heating down to -30°C

The 3-tonne (36,000 BTU) version of the CANAIR 4CDH stands out for its remarkable heating performance under real-world conditions:

• continuous operation down to -30 °C ;

• 36,000 BTU maintained at -15°C , without a sudden drop in capacity;

• stable energy efficiency thanks to variable speed inverter technology;

• seamless transition between heat pump and auxiliary heating when needed.

In several North Shore residences exposed to wind and extreme cold, this system has made it possible to maintain constant comfort without excessive use of electrical elements, even during long cold spells.

Predictable and controlled behavior

Unlike some systems that overcompensate or underperform depending on the outside temperature, the CANAIR 4CDH offers linear and predictable performance . This stability facilitates precise adjustment of the switching thresholds between the heat pump and the auxiliary heating system, a crucial element for optimizing overall energy consumption.

High-performance and balanced central air conditioning

In cooling mode, the nominal capacity of 36,000 BTU effectively meets the needs of medium to large homes, as well as some multi-unit buildings. Thanks to inverter modulation:

• the temperature remains uniform from one room to another;

• Sudden variations are eliminated;

• Humidity is better controlled, particularly during heat waves.

In several residential buildings on the South Shore, we have observed a significant reduction in complaints related to humidity and temperature variations , especially in units located on upper floors.

A mechanical design conceived for actual installation

Outdoor unit with side discharge

The side-discharge design of the outdoor unit offers a tangible advantage during installation:

• easier integration into narrow backyards;

• better space management on flat roofs;

• Installation is possible near walls or fences, provided the required clearances are respected.

For the AirGreen teams, this design translates into a faster, cleaner installation that is better suited to urban environments .

Multi-position and modular indoor unit

The CEB-36MX2121 indoor unit offers considerable installation flexibility:

• vertical or horizontal configuration;

• simplified access to components for maintenance;

• ECM constant flow motor, capable of adapting to pressure variations in the ducts;

• coils made entirely of aluminum, better protected against internal corrosion.

In light commercial projects in Laval, this versatility made it possible to integrate the system into existing mechanical rooms without major reconstruction.

R-454B refrigerant: a responsible technical choice

The choice of R-454B refrigerant is based on regulatory, environmental and technical considerations:

• global warming potential significantly lower than previous generations;

• classification A2L, with integrated safety devices;

• compatibility with current and future HVAC standards.

The system also incorporates automatic leak detection , with safe shutdown and clear signaling, a particularly important feature in multi-unit residential buildings.

Measurable energy efficiency and available subsidies

Performance indices

The 36,000 BTU configuration includes, among other things:

• High SEER2 , ensuring efficient air conditioning throughout the season;

• HSPF2 up to 10.3 , demonstrating solid heating efficiency;

• ENERGY STAR® Cold Climate certification, essential for eligibility for subsidies.

LogisVert Subsidy

This model is eligible for a provincial LogisVert grant of up to $3,504 , depending on the configuration and installation. At AirGreen, we consistently support our clients in Montreal, Laval, Longueuil, the North Shore, and the South Shore with:

• prior technical validation;

• the preparation of the required documents;

• the complete submission of the file.

This approach reduces delays and avoids rejections due to administrative or technical errors.

Comfort, reliability and advanced features

The CANAIR 4CDH ADD-ON central heat pump incorporates several features designed to improve everyday comfort:

• intelligent automatic defrosting;

• automatic restart after power failure;

• function to prevent cold air currents at startup;

• self-cleaning of the coils, limiting the accumulation of moisture;

• silent operation, both indoors and outdoors.

These elements, often overlooked during the purchase, play a crucial role in the system's durability and long-term satisfaction.

Guarantee and long-term vision

The system is covered by:

• 10 years on the compressor ;

• 10 years on parts ;

• Option to add an extended warranty on labor .

For property owners and managers, this coverage is a key factor in budget planning and risk management.

Why entrust the installation to AirGreen

Installing an ADD-ON central heat pump requires much more than a simple connection. It requires:

• a rigorous thermal analysis;

• a thorough understanding of the interactions between the heat pump and the existing furnace;

• precise balancing of airflow;

• settings adapted to the local climate and the actual use of the building.

At AirGreen , every installation is carried out by certified refrigeration technicians, using a proven, documented, and transparent methodology. We deliberately avoid common mistakes such as:

• unnecessary oversizing;

• the approximate settings of the ECM engine;

• poor synchronization between heat pump and auxiliary heating.

Conclusion

The CANAIR 4CDH R-454B | 360000 BTU "ADD-ON" Central Heat Pump represents a structured, reliable and consistent solution for Quebec buildings wishing to improve their energy efficiency without compromising on comfort.

For a personalized analysis , a detailed quote , or to verify eligibility for subsidies in Montreal, Laval, Longueuil, on the North Shore or South Shore, contact AirGreen directly . Our team will take the time to assess your building and propose a solution perfectly tailored to your needs.