CANAIR 4CDH R-454B Central Heat Pump "ADD-ON" | 2T - Cased Coil

• BROCHURE

An ADD-ON central heat pump designed to improve an existing system without replacing it

At AirGreen , we work daily with homeowners who want to optimize their existing HVAC system without undertaking a complete replacement of the central system. The CANAIR 4CDH R-454B | 2-tonne "ADD-ON" Central Heat Pump was designed specifically for this type of project. It integrates directly with an existing electric furnace or central system, adding highly efficient heating and cooling capacity adapted to the Quebec climate.

In Montreal , Laval , Longueuil , and on both the North and South Shores , a large portion of the building stock still relies on functional but energy-intensive central systems. In these situations, a well-designed add-on solution can increase the building's overall efficiency, reduce energy costs, and improve comfort without modifying the existing infrastructure.

A design truly adapted to Quebec's harsh winters

Reliable heating down to -30°C, without compromising stability

The CANAIR 4CDH R-454B stands out for its ability to operate efficiently in extreme weather conditions. For the 2-tonne (24,000 BTU) version, the system maintains a significant heating contribution even during periods of intense cold.

• Rated power: 24,000 BTU

• Power at -8°C: approximately 19,700 BTU

• Power at -15°C: approximately 21,000 BTU

• Continuous operation down to -30°C

In practice, this means the heat pump continues to heat even when temperatures drop well below freezing, reducing the load on the auxiliary electric heating elements. In several installations completed by AirGreen in East Montreal and on the South Shore , this capability has resulted in a stable indoor temperature, without sudden fluctuations or excessive heating cycles.

A measurable and consistent energy efficiency throughout the year

The energy performance of this ADD-ON central heat pump is particularly attractive for residential buildings in Quebec:

• SEER2: 16.0 , ensuring efficient air conditioning during increasingly hot summers

• HSPF2: 9.5 , illustrating sustained heating efficiency

• A COP of 11.83 at -8°C , a key indicator of performance in winter conditions.

These values ​​translate into a tangible reduction in annual electricity consumption , especially in regions with a long heating season. For many AirGreen customers in Laval and on the North Shore , adding this ADD-ON central heat pump resulted in a significant decrease in energy bills within the first full year of use.

R-454B refrigerant: a responsible and future-oriented technical choice

The CANAIR 4CDH Central Heat Pump uses R-454B refrigerant , an A2L type fluid known for its significantly reduced global warming potential compared to previous generations. This choice meets both current environmental requirements and the expectations of customers concerned about limiting their carbon footprint.

For AirGreen, this parameter is not theoretical. In several recent projects, notably in Longueuil , the choice of R-454B facilitated access to financial assistance programs and strengthened the long-term value of the installation, by anticipating regulatory changes in the HVAC sector.

An add-on solution designed for existing central systems

Direct integration without major reconstruction

The main advantage of an ADD-ON central heat pump lies in its ability to seamlessly integrate with an existing system . The CANAIR 4CDH R-454B 2T model is designed to operate with a compatible indoor unit, while utilizing the existing ductwork.

At AirGreen , we install this type of configuration when:

• The ducts are in good condition and properly sized.

• The air distribution is balanced.

• but the main heating system is expensive to operate or inefficient.

In these cases, the ADD-ON acts as a targeted and rational improvement, without demolition, without invasive work and without loss of comfort during the transition.

Compact size and installation flexibility

The side-discharge outdoor unit offers a slimmer profile than traditional top-discharge models. This design facilitates installation in constrained urban environments, such as some narrow backyards in Montreal , or in areas where space around the building is limited.

The multi-position indoor unit (vertical or horizontal) allows for precise adaptation to the existing mechanical room. This flexibility is a real advantage in older homes on the North Shore , where technical space is often limited.

Silence, stability and everyday comfort

Discreet operation, both indoors and outdoors

Acoustic comfort is an often underestimated factor when choosing a central heat pump. The CANAIR 4CDH 2T model has an outdoor noise level of approximately 60 dB(A) , making it quiet even in dense residential areas.

Inside, the constant-flow ECM motor ensures smooth and consistent air circulation. Unlike older systems, it limits sudden speed variations and helps maintain a uniform temperature in all rooms served by the ductwork.

Intelligent management and integrated security

This ADD-ON central heat pump incorporates several devices designed to ensure reliable long-term operation:

• Electronic expansion valve for precise refrigerant control

• A2L refrigerant leak detection , with automatic shutdown in case of an anomaly

• Integrated self-diagnostics , facilitating HVAC maintenance and rapid interventions

These features are particularly important in a central system, which is expected to operate for many hours each year. They help extend the lifespan of the equipment and reduce the risk of costly breakdowns.

Adjustable electric auxiliary heating that can be set according to actual needs

The indoor unit associated with the CANAIR 4CDH R-454B accepts electric heating elements of up to 25 kW . This modularity allows the installed power to be precisely adapted to the building's surface area, insulation, and existing electrical constraints.

During projects carried out by AirGreen on the South Shore , this flexibility made it possible to optimize winter comfort while respecting the capacity of the electrical panel, thus avoiding costly upgrades.

LogisVert grant and added value of the project

The CANAIR 4CDH R-454B | 2T "ADD-ON" Central Heat Pump is eligible for a $2,364 LogisVert provincial grant . In our approach, this grant is never considered in isolation. We integrate it into a comprehensive analysis that includes:

• the total cost of the HVAC installation,

• the projected energy savings,

• the system's durability,

• and the actual return on investment for the client.

In several cases handled by AirGreen in Montreal and Laval , this financial assistance played a decisive role in choosing an ADD-ON solution rather than a complete replacement of the central system.

AirGreen expertise at the heart of every installation

Installing an ADD-ON central heat pump requires specific expertise. It's not simply a matter of connecting an outdoor unit to an existing system. The success of the project depends on several factors:

• the precise sizing of the heat pump,

• the evaluation of the conduit network,

• balancing airflow,

• and the proper configuration of the auxiliary heating.

At AirGreen , we've learned through numerous installations in Longueuil , on the North Shore and the South Shore that the most frequent errors involve poor integration with the existing system or incorrect initial settings. Our methodology aims to eliminate these risks from the analysis phase.

A coherent, sustainable, and scalable central solution

The CANAIR 4CDH R-454B | 2T "ADD-ON" Central Heat Pump is designed for homeowners who want to thoughtfully upgrade their HVAC system . It combines energy efficiency, adaptability to existing systems, reliable operation in cold climates, and compliance with current standards.

Take the next step with AirGreen

For a detailed assessment , a clear estimate , or advice tailored to your building , contact AirGreen directly. Our teams support you at every stage of the project, from the initial analysis to the final installation, throughout Montreal , Laval , Longueuil , and on the North and South Shores .