A central heat pump designed for real Quebec winters, not theoretical conditions
At AirGreen, we have been installing and maintaining central HVAC systems for many years, and one thing is clear: in Quebec, equipment can't be judged on a spec sheet alone. The real questions come up in January, when the temperature drops below -20°C, the wind increases heat loss and the system must keep the house comfortable day and night, without instability or excess consumption.
The CANAIR R410A ADD-ON Central Heat Pump | 48,000 BTU – Cased Coil is a 4-ton add-on central system, intended for both replacement projects and complete new HVAC installations in Montreal, Laval, Longueuil, the North Shore and the South Shore, when the goal is clear: heat efficiently in winter, cool steadily in summer, and stay reliable for the long term.
An ADD-ON design that meets the constraints of existing buildings
The ADD-ON principle in a real-world context
In practice, an ADD-ON system means much more than putting units together. It is a smart approach that allows:
Integration with an existing electric furnace
Keeping existing ductwork
Less structural work
A fit for small mechanical rooms
We regularly see this kind of setup in homes where the mechanical space can't take bulky systems. The cased coil format of the indoor coil (MAC-48HWFN1-M) allows a clean installation on the furnace, without compromising access for HVAC maintenance.
Installation flexibility and mechanical versatility
The CANAIR ADD-ON central heat pump offers great installation flexibility:
Vertical upflow configuration
Vertical downflow configuration
Horizontal configuration
Compatible with several duct orientations
This flexibility is essential in single-family homes, duplexes and multi-unit buildings, where every mechanical room has its own constraints.
Heating capacity you can actually use in a cold climate
Performance measured where it counts
A figure of 48,000 BTU may sound impressive, but what makes the difference in the field is the capacity kept at low temperatures.
According to the NEEP data for this system (AHRI 211644137), this model delivers:
32,000 BTU/h at -8°C (COP 2.36)
40,000 BTU/h at -15°C (COP 1.8)
Working heat down to -30°C, with a maximum capacity of 30,000 BTU/h (COP 1.52)
SEER2 14.3, EER2 8.6, HSPF2 (region IV) 9.0
R-410A refrigerant (global warming potential of 2,088)
Please note: this R-410A combination is not ENERGY STAR® certified and is not on the list for Hydro-Québec's LogisVert program. If LogisVert aid matters for your project, AirGreen can offer you the eligible CANAIR 4CDH R-454B models.
Stable behaviour even in extreme cold
This central heat pump keeps modulating, without aggressive short cycles. In deep cold, the furnace's electric element covers the share of heat that is missing. The result:
A more constant indoor temperature
Fewer differences from one room to another
Less mechanical stress on the compressor
In open-concept or multi-storey homes, this is a real everyday advantage.
Controlled acoustic comfort, indoors and outdoors
A central system often runs for several hours a day, so noise matters in the medium and long term.
The CANAIR R410A ADD-ON central heat pump offers:
Inverter technology with progressive modulation
A coil that uses the existing furnace blower (no added fan)
A check of the duct network's static pressure by AirGreen
An outdoor sound level of about 64 dB(A) for the 4-ton size
Essential technical data for a successful HVAC installation
Nominal capacity: 48,000 BTU (4 tons)
Outdoor unit / coil: CDH2048C21 / MAC-48HWFN1-M
Refrigerant: R-410A
Voltage: 220 V
MCA: 40 A
MOP: 50 A
Refrigerant piping: 3/8 – 3/4
Outdoor dimensions: 37.48 x 16.34 x 52.48 in
Indoor dimensions (coil): 21 x 21 x 24 in
Airflow: provided by the furnace blower, to be checked for the tonnage
Wi-Fi: optional, depending on the configuration
At AirGreen, these parameters are always checked beforehand to avoid undersized electrical or refrigerant lines, an error still too common in poorly planned HVAC installations.
What AirGreen's field experience shows about this type of system
Common errors we regularly correct
Even with a good product, some errors can hurt performance:
Poorly sealed ductwork
Poor airflow distribution
Unsuitable or poorly placed thermostat
No balancing after installation
Underestimated electrical needs
These errors don't always show up right away, but in the medium term they lead to less comfort and higher operating costs.
Our AirGreen approach to ADD-ON central systems
Our method is based on:
A complete analysis of the building, not just the floor area
An assessment of the actual heating needs
Precise airflow adjustment after start-up
Operating tests in heating and cooling
A clear explanation of how the system works for the client
HVAC maintenance, durability and warranties
The CANAIR R410A ADD-ON central heat pump is designed for simplified maintenance:
Quick access to components
A coil that is easy to inspect and clean
Clearly organized electrical components in the outdoor unit
Warranties:
10 years on the compressor
10 years on parts
6 years on labour, directly from the distributor, with an optional extended warranty
At AirGreen, we recommend HVAC maintenance every 12 to 18 months, especially to preserve heating performance and keep efficiency stable over the years.
Why entrust the installation to AirGreen
Choosing good equipment is essential. Having it installed correctly matters even more.
By entrusting your project to AirGreen, you benefit from:
Experienced refrigeration technicians, under AirGreen's RBQ licence 5645-9605-01
$5 million in liability insurance
A transparent approach, with no surprises at the end of the job
Field expertise covering residential, multi-unit and light commercial buildings
Knowledge of local conditions in Montreal, Laval, Longueuil, the North Shore and the South Shore
Our goal is not just to install a system, but to deliver an HVAC solution that is coherent, durable and truly suited to your building. To see installations completed by our teams, visit our Our projects page.
Conclusion
The CANAIR R410A ADD-ON Central Heat Pump | 48,000 BTU – Cased Coil is a reliable central solution for buildings that need strong heating in winter, stable cooling in summer and smart integration with existing systems.
When it is well selected, correctly installed and precisely adjusted, it offers a good balance of performance, comfort and energy cost control.
For a detailed quote, a compatibility analysis or specific advice for your HVAC project in Montreal, Laval, Longueuil, the North Shore or the South Shore, contact AirGreen at 514-316-2973 or sales@airgreen.ca. Our team will take the time to assess your situation and offer a solution that fits.
Warranty: 10 years on the compressor, 10 years on parts and 6 years on labour, directly from the distributor.