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

• BROCHURE

A thoughtful, centralized approach, adapted to the real buildings of Quebec

At AirGreen , we have been installing central HVAC systems for over 15 years in real-world, sometimes complex, and rarely ideal situations. From Montreal single-family homes with aging ductwork, to Laval bungalows heated by electricity, to multi-unit buildings in Longueuil, or newer residences on the North and South Shores: each project imposes its own technical constraints.

The CANAIR 4CDH R-454B | 2-tonne “ADD-ON” central heat pump is one of the solutions we favor precisely when a complete system replacement is neither necessary nor practical. It was designed to integrate seamlessly with an existing furnace , while providing significant gains in comfort, thermal stability, and energy efficiency.

This is not a temporary compromise, but a structured choice, often more sensible than a complete replacement, when the air distribution is functional and well-sized.

The typical context of our ADD-ON installations

In a large proportion of the projects carried out by AirGreen in Montreal and Laval, we encounter the same scenario:

• A furnace that is still reliable, sometimes recent.

• Air conditioning that is absent, undersized, or inefficient.

• High heating costs during prolonged periods of cold.

• A clear desire to reduce dependence on more expensive energy sources, without completely transforming the existing infrastructure.

The ADD-ON format perfectly addresses this reality. It allows for the introduction of a high-performance central heat pump without demolition, without redoing the entire HVAC system, and without increasing indirect costs.

The ADD-ON format: an often underestimated technical logic

An integration that respects what already exists

Contrary to some misconceptions, a well-designed add-on system can offer performance comparable to a complete central system, provided the installation is meticulous. With the CANAIR 4CDH , the outdoor unit and indoor coil integrate directly into the existing network, working in synergy with the furnace.

This allows:

• To keep the existing conduits.

• To limit structural work.

• To ensure a gradual and controlled energy transition.

In several homes in Longueuil and on the South Shore, this approach has made it possible to improve overall comfort without disrupting the interior layout or the habits of the occupants.

A more targeted, but sustainable investment

Rather than replacing components that are still functional, the ADD-ON approach focuses investment where it generates the greatest impact: energy efficiency and seasonal comfort . This logic is particularly appreciated by homeowners who plan their improvements over several years, without sacrificing current performance.

Measurable performance in heating and air conditioning

Reliable central heating down to -30°C

The CANAIR 4CDH R-454B 2T central heat pump is designed to meet the real-world demands of Quebec's climate. Its stable operation down to -30°C is not just a marketing claim: in practice, this means a system that continues to actively contribute to heating, even during the prolonged cold spells we regularly experience in Montreal and on the North Shore.

At critical temperatures:

• At -8 °C , the power delivered reaches approximately 19,700 BTU .

• At -15°C , it rises to nearly 21,000 BTU .

In multi-unit residential projects carried out by AirGreen, this capability makes it possible to considerably reduce the use of auxiliary heating, while maintaining a stable indoor temperature on all floors.

A direct impact on the energy bill

In practice, customers often observe a significant decrease in their winter energy consumption. The heat pump handles a large portion of the heating for most of the season, leaving the furnace to kick in mainly during extreme cold or as a supplementary source of heat.

Stable and well-distributed central air conditioning

With a capacity of 24,000 BTU , this model ensures even cooling without overcooled areas or sudden temperature fluctuations. In multi-story homes, a common problem is heat buildup on the upper floors; the CANAIR 4CDH , combined with proper air balancing, effectively corrects this issue.

The constant flow ECM motor plays a key role here. It automatically adjusts the airflow based on network resistances (filters, bends, duct lengths), which improves:

• Thermal comfort.

• Humidity management.

• The longevity of the components.

A design conceived for maintenance and longevity

Practical and accessible indoor unit

The indoor unit associated with the CANAIR 4CDH is distinguished by a design geared towards real-world maintenance, not just theoretical maintenance. It offers:

• A multi-position configuration (vertical upward, downward or horizontal).

• An aluminum evaporator coil , which is more resistant to corrosion.

• A simple and quick access hatch to the filter , facilitating regular HVAC maintenance.

In several Montreal residences, this design allowed us to install the unit in confined mechanical spaces, without compromising future accessibility.

Quiet operation, both indoors and outdoors

With an outdoor noise level of approximately 60 dB(A) , the heat pump remains discreet, a crucial factor in dense residential areas. Inside, the progressive modulation of the fan eliminates sudden starts, often perceived as uncomfortable by occupants.

The R-454B refrigerant: efficiency and environmental consistency

R-454B , classified A2L , represents a significant improvement over older refrigerants. Its reduced global warming potential aligns with an environmental approach consistent with current market trends in Quebec.

For AirGreen, this choice is also technical: this fluid allows for better overall system efficiency, while meeting safety and performance requirements. In the context of the energy transition, it represents a sustainable choice without compromising winter heating capacity.

LogisVert subsidies and AirGreen support

At the time of installation, the LogisVert provincial grant associated with this model can reach $2,364 , depending on project eligibility. At AirGreen, we don't just mention this assistance; we verify each application in detail.

This includes:

• AHRI number compliance.

• The exact system configuration.

• Compliance with the required technical criteria.

In several projects in Laval and on the South Shore, this subsidy made the installation of a central heat pump more financially advantageous than a simple air conditioner replacement , while providing a significant gain in heating.

Common mistakes we systematically avoid

With ADD-ON systems, certain errors can seriously harm overall performance if they are not anticipated:

• Incorrect assessment of existing static pressure .

• Imbalance in airflow after installation.

• Integration on a poorly maintained or unsuitable furnace.

At AirGreen, every installation includes a complete analysis of the ductwork , precise adjustments, and real-world testing. This rigorous approach explains the reliability observed in our installations completed over the years in Montreal, Longueuil, and on the North Shore.

Why entrust your project to AirGreen

Choosing the CANAIR 4CDH R-454B | 2T central heat pump is a technical decision. Entrusting it to AirGreen ensures that this decision is implemented correctly.

Our approach is based on:

• Clear and confirmed prices before work begins .

• Experienced refrigeration technicians , specializing in central hybrid installations.

• A $5 million liability insurance policy .

• In-depth field knowledge of the HVAC realities specific to Montreal, Laval, Longueuil, the North Shore and the South Shore .

We never recommend this model automatically. It is only offered when it precisely meets the building's needs and the client's expectations.

A consistent, durable, and proven central heat pump

The CANAIR 4CDH R-454B 2-tonne is designed for homeowners seeking a well-thought-out central solution that can be integrated into an existing installation while offering:

• Reliable heating down to -30°C .

• Stable and well-distributed central air conditioning .

• Tangible energy efficiency , supported by provincial subsidies.

It is a pragmatic solution, proven in the field, which fits perfectly into a long-term vision of residential comfort in Quebec.

Speak to an AirGreen expert now

Are you considering a central HVAC installation or want to know if an ADD-ON configuration is suitable for your property? Contact AirGreen for a detailed assessment , a clear estimate and complete support, whether you are in Montreal, Laval, Longueuil, on the North Shore or the South Shore .

Telephone: 514-316-2973
Email: sales@airgreen.ca