CANAIR 4CDH R-454B Central Heat Pump "ADD-ON" | 4T - 48000 BTU - Cased Coil

• BROCHURE

A central heat pump designed for existing buildings and Quebec's demanding climate

At AirGreen, we work every day in existing buildings, some of them decades old, where owners want to modernize their HVAC system without starting over. The CANAIR 4CDH R-454B "ADD-ON" Central Heat Pump | 4T – 48,000 BTU follows exactly this logic: an efficient, scalable and realistic central solution, designed to fit into existing installations while meeting the demands of Quebec's climate.

This type of heat pump is particularly relevant for single-family homes, duplexes, triplexes and multi-unit buildings in Montreal, Laval, Longueuil, the North Shore and the South Shore that already have an electric furnace or a working central system. The ADD-ON format adds a high-efficiency central heat pump without major demolition, without redoing all the ducts, and without tying up the building for weeks.

The ADD-ON concept: a controlled, intelligent energy transition

Unlike complete replacements, which often require heavy work, the ADD-ON configuration takes a step-by-step approach. A 4CDH2048C21 outdoor unit and a CEB-60MX2121 cased coil, set on the furnace, complement and optimize the existing installation. The heat pump handles the cooling and much of the annual heating, and the furnace stays as backup for extreme periods.

In practice, this brings several concrete advantages:

• Lower energy use, especially for shoulder-season heating

• Better comfort, with a steadier, more even temperature

• A smarter budget, with no needless replacement of components that still work

• Long-term flexibility, with the option to adjust or upgrade the system later

At AirGreen, we often recommend this approach to owners who want to move forward step by step, without compromising on quality or on the overall performance of the HVAC system.

A side-discharge design suited to urban settings

The CANAIR 4CDH stands out for its side-discharge design, a technical detail that is often underestimated but very important in the field. This configuration allows a more flexible installation in tight spaces: narrow backyards, side passages, flat roofs or areas hemmed in between buildings.

In dense neighbourhoods, where space is limited, this format makes it easier to place the outdoor unit without hurting airflow or the building's appearance. For our crews, it also means a more precise, better-controlled installation and less handling.

Solid heating performance, even in deep cold

With a nominal capacity of 48,000 BTU, this 4-ton central heat pump is designed to serve large areas efficiently, in residential, multi-unit or light commercial settings.

This system's NEEP figures (AHRI 216684081)

• Heating at -8°C: 34,400 BTU/h (COP 2.42)

• Heating at -15°C: 42,000 BTU/h (COP 1.85)

• Heating at -30°C: up to 30,000 BTU/h (COP 1.6)

• SEER2 15.2, EER2 10.0, HSPF2 (region IV) 8.8, ENERGY STAR® cold climate certified

• Central air distribution through the existing ductwork, for even comfort in every room

In deep cold, the furnace's electric element covers the share of heat that is missing.

Inverter technology: stability, quiet and longevity

The inverter technology built into the CANAIR 4CDH plays a central role in its everyday behaviour. Instead of running in abrupt on/off cycles, the system continuously adjusts its output to the building's real demand.

The benefits are concrete:

• A more stable indoor temperature, without uncomfortable swings

• Quieter operation, for occupants and neighbours alike

• Less mechanical wear, which extends the compressor's life

• Better-controlled energy use, especially in the shoulder seasons

In multi-unit buildings, this stability helps limit noise complaints and improve occupant comfort.

R-454B refrigerant: a responsible, forward-looking choice

The CANAIR 4CDH uses R-454B, a new-generation A2L refrigerant with a global warming potential of 466, compared with 2,088 for R-410A. This choice reflects a clear commitment to HVAC systems that meet current environmental requirements.

Technically, this refrigerant provides:

• compliance with current regulatory requirements;

• safe integration, with the leak detection required for A2L refrigerants.

The refrigerant leak detection is connected and checked by AirGreen during installation.

A cased coil designed for the installer and the owner

With an ADD-ON system, the indoor coil is installed on the existing furnace:

• CEB-60MX2121 cased coil (21 × 21 × 28 in.), installed vertically or horizontally

• Blower: the existing furnace's, with airflow checked and adjusted by AirGreen to suit the duct pressure

• Refrigerant line connections of 3/8 in. and 3/4 in.

• 220 V supply for the outdoor unit (MCA 38 A, MOP 40 A)

For owners, this means a more reliable system that is easier to maintain and less prone to performance losses from dirt build-up or airflow imbalances.

Acoustic comfort suited to everyday life

With a controlled outdoor sound level (65 dB(A)), the CANAIR 4CDH fits well in dense residential settings. Indoors, the compressor's modulated operation helps create a calmer atmosphere, much appreciated in living spaces and bedrooms.

This matters especially in row houses and shared buildings.

Hydro-Québec LogisVert aid: a financial advantage worth considering

This combination (AHRI 216684081) is on Hydro-Québec's LogisVert list of October 27, 2026, with an indicative amount of $4,128. Only Hydro-Québec confirms the aid granted.

At AirGreen, we support our clients at every step:

• checking eligibility;

• choosing the right coil / outdoor unit match;

• making sure the certification numbers are compliant;

• the documents needed for the application after installation.

Why trust AirGreen with your project

Installing an ADD-ON central heat pump of this class takes much more than a simple hookup. Real performance depends on many factors: assessing heating needs, balancing the ducts, settings, defrost management and coordination with the furnace's backup heat.

At AirGreen, we rely on:

• experienced refrigeration technicians, working under AirGreen's RBQ licence 5645-9605-01;

• rigorous installation methods;

• $5M civil liability insurance;

• a transparent approach, with clear prices and no surprises after the work.

Our goal is simple: deliver a system that truly performs, year after year. To see installations completed by our teams, visit our Our projects page.

Warranty and long-term peace of mind

The CANAIR 4CDH is covered by a 10-year warranty on the compressor and parts and 6 years on labour, directly from the distributor, with the option to extend the labour warranty. For homeowners and building managers alike, this coverage provides real security and predictable maintenance costs.

In conclusion

The CANAIR 4CDH R-454B "ADD-ON" Central Heat Pump | 4T – 48,000 BTU is a robust, flexible and coherent central solution for anyone who wants better comfort, lower energy use and a more modern HVAC installation, without rebuilding everything.

Talk to AirGreen about your project

For a personalized assessment, a detailed quote or to check the model's LogisVert eligibility, contact AirGreen Climatisation & Chauffage at 514-316-2973 or sales@airgreen.ca. We serve Montreal, Laval, Longueuil, the North Shore and the South Shore, with a professional, structured, results-focused approach.

Contact AirGreen today to plan your CANAIR ADD-ON central heat pump installation.

Warranty: 10 years on the compressor, 10 years on parts and 6 years on labour, directly from the distributor.