CANAIR 4CDH R-454B "ADD-ON" Central Heat Pump | 2.5T - 30,000 BTU - Cased Coil

• BROCHURE

A central heat pump designed for the climatic and real estate realities of Quebec

At AirGreen Air Conditioning & Heating , we have been installing central HVAC systems for over 15 years in very specific contexts: single-family homes in Montreal , duplexes and triplexes in Laval , multi-unit buildings in Longueuil , renovated residences on the South Shore , and newer constructions on the North Shore . The CANAIR 4CDH R-454B “ADD-ON” central heat pump – 2.5 tonnes (30,000 BTU) – is specifically designed to meet this diversity of buildings and needs.

This is not a generic central system, but a solution designed to integrate intelligently with existing installations, while delivering real heating performance even when temperatures plummet. In a climate where prolonged winters and rapid temperature fluctuations are the norm, this model provides a stable, measurable, and sustainable solution.

The ADD-ON concept: a pragmatic approach for existing buildings

Why the ADD-ON format is strategic in Quebec

In much of the housing stock in Montreal , Laval , and Longueuil , buildings already have a functional ductwork system and an aging electric furnace or central heating system. Replacing the entire infrastructure is not always necessary or cost-effective.

The ADD-ON concept allows:

• Adding a high-performance central heat pump without rebuilding the ductwork

• To keep an existing electric furnace as a backup or supplementary heating source

• To drastically reduce energy consumption without major transformation

At AirGreen, we favour this type of integration when the building structure is suitable, as it offers an excellent compromise between performance, cost and sustainability.

Thermal performance adapted to Quebec winters

Reliable heating down to -30°C

The CANAIR 4CDH R-454B – 2.5T is designed to operate efficiently in harsh winter conditions. Unlike some central systems that rapidly lose capacity below -15°C, this model maintains remarkable stability:

• Rated capacity : 30,000 BTU

• Power at -8°C : approximately 25,000 BTU

• Power at -15°C : up to 32,000 BTU

• Continuous operation down to -30°C

In several AirGreen installations carried out in Laval , Anjou and Boucherville , this capacity makes it possible to cover the majority of heating needs without excessively using the auxiliary electric elements, even during prolonged cold spells.

Balanced and efficient central air conditioning

In cooling mode, the 30,000 BTU capacity is ideal for average-sized single-family homes or well-insulated dwellings. Inverter modulation ensures:

• A stable indoor temperature

• A reduction in on/off cycles

• Better control of summer humidity

This results in consistent comfort, without sudden variations or unnecessary overconsumption.

Energy efficiency: figures that translate into a difference on the bill

The performance indicators for this central heat pump are particularly relevant for full-year use:

• SEER2: 16.8 (seasonal air conditioning efficiency)

• HSPF2: 10.0 (seasonal heating efficiency)

• EER2: 11.7 (instantaneous efficiency)

• COP at -8 °C: approximately 1.85

In practical terms, this means that for every kilowatt consumed, the system delivers significantly more thermal energy than direct electric heating. For several AirGreen customers on the South Shore , this improvement resulted in a noticeable reduction in energy costs from the very first year.

R-454B refrigerant: a choice for the future, without technical compromise

R-454B is a new generation refrigerant, classified A2L , recognized for its global warming potential (GWP) which is significantly lower than older refrigerants widely used in the past.

For homeowners, this means:

• A solution that is more respectful of current environmental standards

• Improved compatibility with grant programs

• A sustainable choice in the face of future regulations

At AirGreen, we are seeing increasing demand for this type of refrigerant, particularly among customers concerned about the energy transition and the long-term value of their property.

Mechanical design conceived for actual installation, not just on paper

Side-discharge outdoor unit: a tangible advantage

The 4CDH2030C21 outdoor unit adopts a side discharge design, which offers several tangible benefits:

• Easy installation in narrow courtyards or confined spaces

• Improved airflow management near walls and fences

• Reduction of perceived noise in living areas

With a noise level of approximately 60.5 dB(A) , this unit remains discreet for a central system of this capacity, a point often appreciated in the dense residential areas of Montreal and Longueuil .

Modular and accessible indoor unit

The CEB-36MX2121 indoor unit was designed to simplify both installation and maintenance:

• Multi-position configuration (vertical or horizontal)

• Constant airflow ECM engine

• Quick access to the filter and coil

• Electrical compatibility: 115V / 230V

In practice, this reduces installation constraints in narrow basements or existing mechanical rooms, while facilitating long-term HVAC maintenance interventions.

Air management and indoor comfort

An often underestimated aspect of central air conditioning systems is the quality of air distribution . The CANAIR 4CDH offers:

• A well-distributed airflow ( CFM adapted to the tonnage )

• A maximum static pressure compatible with most residential networks

• Improved temperature uniformity between floors

At AirGreen, we systematically adjust the flow rates and balance the network after installation to avoid areas that are too hot or too cold, a common problem with poorly configured systems.

LogisVert subsidy: a real financial incentive

The CANAIR ADD-ON 4CDH R-454B – 2.5T central heat pump is eligible for a $3,000 LogisVert provincial grant , subject to applicable criteria.

AirGreen supports its clients at every stage:

• Validation of the model and AHRI number

• Preparation of required technical documents

• Installation compliance to avoid any rejection

This approach avoids unpleasant surprises and maximizes real savings for homeowners in Montreal , Laval , North Shore and South Shore .

AirGreen real-world case study: conversion of an energy-intensive central system in Laval

In a single-family home in Laval , built in the early 2000s, the existing system combined an electric furnace and an old, inefficient central air conditioner. After thermal analysis and duct inspection, AirGreen recommended the installation of a CANAIR 4CDH 2.5T ADD-ON central heat pump .

After a full winter:

• Electricity consumption has decreased measurably

• Thermal comfort remained stable even below -25°C

• The overall noise level of the system has been reduced

This type of result perfectly illustrates the value of a well-sized and properly integrated central system.

Common mistakes to avoid with a central heat pump

Even excellent equipment can underperform if certain steps are neglected:

• Underestimating the actual condition of existing conduits

• Ignore the maximum allowable static pressure

• Incorrectly configure the auxiliary electrical components

• Neglecting the final balancing of the airflow

At AirGreen, every HVAC installation includes a complete post-installation verification to ensure that the system is operating within its actual capabilities, and not just within its theoretical specifications.

Why entrust your project to AirGreen Air Conditioning & Heating

Choosing AirGreen means ensuring:

• With proven field expertise in central HVAC

• Transparent pricing , confirmed before work begins

• Certified, experienced, and methodical refrigeration technicians

• $5 million in liability insurance

Our approach is simple: to offer solutions tailored to each building, without oversizing or unrealistic promises.

Conclusion

The CANAIR 4CDH R-454B “ADD-ON” central heat pump – 2.5 tonnes / 30,000 BTU – represents a particularly coherent solution for homeowners wishing to modernize their central system, reduce their energy costs and benefit from reliable comfort, even during the most rigorous winters in Quebec.

For a detailed quote , a complete analysis of your existing system , or personalized technical advice, contact AirGreen Air Conditioning & Heating today. Our team will guide you from the initial assessment to final commissioning, with a professional, clear approach tailored to your specific needs.