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

• BROCHURE

A central heat pump designed for Quebec’s climate and housing

At AirGreen Air Conditioning & Heating, we have been installing central HVAC systems for more than 15 years in very real settings: single-family homes in Montreal, duplexes and triplexes in Laval, multi-unit buildings in Longueuil, renovated homes on the South Shore and newer builds on the North Shore. The CANAIR 4CDH R-454B “ADD-ON” central heat pump – 2.5 tons (30,000 BTU) is aimed precisely at this variety of buildings and needs.

It is not a generic central system, but a solution designed to integrate with existing installations while delivering real heating performance even when the temperature drops sharply.

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

Why the ADD-ON format makes sense in Quebec

Much of the housing in Montreal, Laval and Longueuil already has working ductwork and an electric furnace or an aging central system. Replacing the whole infrastructure is not always necessary or cost-effective.

The ADD-ON concept lets you:

• Add a high-performing central heat pump without rebuilding the ductwork

• Keep an existing electric furnace as backup heat

• Lower energy use without major changes

At AirGreen, we favour this kind of integration when the building allows it, because it offers an excellent balance of performance, cost and durability.

Heating performance suited to Quebec winters

Reliable heating down to -30°C

The CANAIR 4CDH R-454B – 2.5T is designed to work efficiently in severe winter conditions. According to the NEEP data for this combination (AHRI 216621491):

• Nominal capacity: 30,000 BTU

• Heating at -8°C: 25,000 BTU/h

• Heating at -15°C: 32,000 BTU/h

• Heating at -30°C: up to 22,000 BTU/h

In deep cold, the existing furnace’s electric element takes over for the missing share of heat.

Balanced, efficient central cooling

In cooling mode, the 30,000 BTU capacity suits medium-sized single-family homes or well-insulated dwellings. Inverter modulation provides:

• A stable indoor temperature

• Fewer on/off cycles

• Better control of summer humidity

Energy efficiency: numbers that show on your bill

Certified performance ratings for this combination (AHRI 216621491):

• SEER2: 16.0 (seasonal cooling efficiency)

• HSPF2: 9.6 (seasonal heating efficiency)

• EER2: 11.0 (instantaneous efficiency)

• COP at -8°C: 2.4 (1.85 at -15°C)

In practical terms, for every kilowatt used, the system delivers more heat than direct electric heating, which lowers energy costs.

R-454B refrigerant: a forward-looking choice

R-454B is a new-generation A2L refrigerant whose global warming potential (GWP) is 466, compared with 2,088 for the widely used R-410A.

For homeowners, this means:

• A solution more in line with current environmental standards

• A durable choice in view of future regulations

Mechanical design built for real installations

Side-discharge outdoor unit: a concrete advantage

The 4CDH2030C21 outdoor unit uses a side-discharge design, which offers several benefits:

• Easier installation in narrow yards or tight spaces

• Better airflow management near walls and fences

• Less perceived noise in living areas

With a sound level of about 60.5 dB(A), this unit stays discreet for a central system of this capacity.

Cased indoor coil

The CEB-36MX2121 indoor coil (21 x 21 x 24 in cabinet) installs on the existing furnace and uses its blower:

• Cased coil, ready to connect to the ductwork

• No added fan: the furnace blower moves the air

• Easy access to the coil for inspection and cleaning

Airflow and indoor comfort

With an ADD-ON system, airflow depends on the existing furnace blower. That is why AirGreen checks:

• The airflow (CFM) required for the tonnage

• The static pressure of the ductwork

• Temperature balance between floors

We adjust airflow and balance the system after installation to avoid rooms that are too hot or too cold.

Hydro-Québec LogisVert aid

The CANAIR 4CDH R-454B – 2.5T ADD-ON central heat pump is eligible for Hydro-Québec’s LogisVert program, with an indicative amount of $3,000, subject to the criteria in force. Only Hydro-Québec confirms the aid granted.

AirGreen supports its clients at every step:

• Validation of the model and AHRI number

• Preparation of the required technical documents

• An installation that meets the program’s requirements

Common mistakes to avoid with a central heat pump

• Underestimating the real condition of existing ducts

• Ignoring the maximum allowable static pressure

• Misconfiguring the backup electric elements

• Skipping the final airflow balancing

At AirGreen, every HVAC installation includes a complete check after installation.

Why trust your project to AirGreen Air Conditioning & Heating

• Field expertise in central HVAC

• Transparent prices, confirmed before work begins

• Experienced, methodical refrigeration technicians, under AirGreen’s RBQ licence 5645-9605-01

• $5M civil liability insurance

Our approach is simple: solutions suited to each building, with no oversizing and no unrealistic promises. To see installations completed by our teams, visit our Our projects page.

Conclusion

The CANAIR 4CDH R-454B “ADD-ON” central heat pump – 2.5 tons / 30,000 BTU is a sound solution for homeowners who want to modernize their central system, lower their energy costs and enjoy reliable comfort, even in Quebec’s harshest winters.

For a detailed quote, an assessment of your existing installation or personalized technical advice, contact AirGreen Air Conditioning & Heating at 514-316-2973 or sales@airgreen.ca.

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