CANAIR 4CDH R-454B "ADD-ON" Central Heat Pump | 18000 BTU - Cased Coil
SEER2 (Seasonal Energy Efficiency Ratio)
HSPF2 (Heating Seasonal Performance Factor)
EER2 (Instant Cooling Efficiency)
COP at -8 °C (Heating energy efficiency)
COP at -15 °C (Heating energy efficiency)
Operating temperature down to -30 °C (MAX)
CFM (Airflow)
A central heat pump designed for Quebec’s climate and existing buildings
At AirGreen, we have been installing and integrating HVAC systems for more than 15 years in Montreal, Laval, Longueuil, the North Shore and the South Shore. That field experience has taught us one thing clearly: a central system that performs well on paper is not necessarily one that suits Quebec winters, existing homes and the mechanical constraints of residential and multi-unit buildings.
The CANAIR 4CDH R-454B ADD-ON central heat pump – 18,000 BTU addresses exactly those issues. It is added to an existing central system and brings a real improvement in comfort, lower electricity use and eligibility for Hydro-Québec’s LogisVert program.
This 1.5-ton (18,000 BTU) model is a particularly balanced solution for homeowners who want to modernize their installation without rebuilding their whole HVAC system.
The ADD-ON approach: realistic, economical and technically sound
In Quebec, most homes already have ductwork, an electric furnace or an aging central system. Replacing the whole infrastructure is not always necessary or relevant.
The ADD-ON concept is simple but effective: make the most of what is already there. An outdoor unit and a cased coil, set on the furnace, are added to the existing system. In practice, this lets you:
Reduce work costs
Limit structural changes
Shorten installation time
Make a gradual, controlled energy transition
Keep the building’s thermal balance
Heating performance designed for extreme winters
One of the most critical points when choosing a central heat pump in Montreal and Montérégie is its real ability to keep heating when temperatures drop.
The CANAIR 4CDH R-454B 18,000 BTU is ENERGY STAR® cold climate certified and keeps heating down to -30°C. According to the NEEP data for this system (AHRI 216621486), it delivers 15,200 BTU/h at -8°C (COP 2.7), 18,000 BTU/h at -15°C (COP 2.06) and up to 11,500 BTU/h at -30°C (COP 1.44). In deep cold, the furnace’s electric element takes over for the missing share of heat.
Key technical data for the 18,000 BTU model
Nominal cooling capacity: 18,000 BTU
Heating at -8°C (NEEP): 15,200 BTU/h, COP 2.7
Heating at -15°C (NEEP): 18,000 BTU/h, COP 2.06
Heating at -30°C (NEEP): up to 11,500 BTU/h, COP 1.44
SEER2: 16.1
HSPF2 (region IV): 9.5
Outdoor sound level: 59 dB(A)
Voltage: 220 V
Refrigerant: R-454B (A2L)
These features make this model particularly well suited to well-insulated single-family homes, duplexes, triplexes and some condos with central ducts.
R-454B refrigerant: a sound technical and environmental choice
R-454B marks an important step forward in HVAC. This new-generation refrigerant has a global warming potential of 466, compared with 2,088 for the R-410A used in many central systems.
In practical terms, this means:
A smaller environmental footprint
Better compliance with refrigerant standards
A safe installation thanks to the leak detection required for A2L refrigerants
A cased coil that fits your furnace
With an ADD-ON system, the cased coil is installed on the existing furnace, and the furnace blower moves the air through the coil. Setting this airflow correctly is essential to the heat pump’s efficiency.
Specific features
CEB-24MX1721 cased coil: 17.5 × 21 × 18 in, about 42 lb
4CDH2018C21 outdoor unit with an inverter compressor
Refrigerant lines: 3/8 in and 3/4 in
Blower: the existing furnace’s, whose airflow AirGreen checks and adjusts
Refrigerant leak detection specific to R-454B (A2L)
Acoustic comfort: often underestimated, but essential
A central system often runs for long hours, especially during cold snaps or heat waves. The inverter technology in the CANAIR 4CDH continuously modulates output, avoiding abrupt starts and short cycles.
The benefits are very concrete:
A more stable indoor temperature
Fewer swings in humidity
Less noise in living spaces
Better comfort at night, even with long cooling periods
Hydro-Québec LogisVert aid
The CANAIR 4CDH 18,000 BTU ADD-ON central heat pump is eligible for Hydro-Québec’s LogisVert program, with an indicative amount of $1,824. Only Hydro-Québec confirms the aid granted.
At AirGreen, we support our clients at every step:
Technical check of eligibility
Choice of a model that meets the criteria
Installation that meets the program’s requirements
Documents required for the aid application
This approach helps avoid the common mistakes made when the application is poorly prepared.
Why trust AirGreen with the installation
Installing an ADD-ON central heat pump takes much more than a simple hookup. Every building has key variables: insulation, duct layout, heat loss, and real heating and cooling needs.
Our method is based on:
An on-site assessment of heating needs
A tonnage suited to the building
Smooth integration with the existing system
Technicians specialized in central systems, under AirGreen’s RBQ licence 5645-9605-01
$5,000,000 liability insurance
Clear, detailed prices, sent before the work
To see installations completed by our teams, visit our Our projects page.
Who the 18,000 BTU model is best for
The CANAIR 4CDH R-454B 18,000 BTU is ideal for:
Well-insulated single-family homes
Duplexes and triplexes
Condos with existing central ducts
Energy transition projects
Partial replacement of an aging central system
The right tonnage avoids short cycles, optimizes seasonal efficiency and helps the system last longer.
Conclusion
The CANAIR 4CDH R-454B ADD-ON central heat pump | 18,000 BTU is a balanced, reliable solution suited to Quebec. It combines winter performance, energy efficiency, environmental responsibility and flexible integration, without compromising comfort.
For a personalized assessment, a detailed quote or to check your LogisVert eligibility, contact AirGreen directly at 514-316-2973 or sales@airgreen.ca. Our team will take the time to look at your situation and suggest a solution that truly fits your building.
AirGreen – Air conditioning, heating and central heat pumps suited to Quebec’s climate.
Warranty: 10 years on the compressor, 10 years on parts and 6 years on labour, directly from the distributor.