Central Heat Pump "ADD-ON" CANAIR 4CDH R-454B | 30000 BTU - Coils WITH Housing

• BROCHURE

A central "ADD-ON" solution designed for Quebec's demanding buildings

At AirGreen, we have been installing HVAC systems for over 15 years in settings where real performance matters more than theoretical promises. Single-family homes, multi-unit buildings, commercial buildings: in Montreal, Laval, Longueuil, the North Shore and the South Shore, every project brings different realities. The CANAIR 4CDH R-454B "ADD-ON" Central Heat Pump fits precisely into this logic of smart adaptation.

The ADD-ON concept is not a compromise. It is a considered approach that upgrades an existing central system (often an electric furnace and well-sized ductwork) to improve its energy efficiency, temperature stability and running costs, without a complete rebuild. A 4CDH2030C21 outdoor unit and a CEB-36MX1721 cased coil, set on the furnace, are added to the existing system.

In practice, this kind of project takes solid expertise: assessing heating needs, understanding defrost cycles, controlling airflow, safe electrical integration and system balancing. That is exactly where the CANAIR 4CDH R-454B shows its full potential when installed by an experienced team like AirGreen.

A system built for rational, lasting decisions

Owners and building managers who choose this model are above all looking for a reliable solution that matches Quebec winters and today's energy requirements:

• Heating down to -30°C, with the furnace only covering the share of heat that is missing

• R-454B refrigerant (A2L), with a global warming potential of 466

• ENERGY STAR® cold climate certification, required by Hydro-Québec's LogisVert program

• Side-discharge outdoor unit, ideal for tight yards and clearances

The comfort you get depends on careful system selection and a well-controlled installation, especially in areas that are hard to heat evenly.

Real performance, measurable efficiency and a design suited to Quebec's climate

This system's NEEP figures

During intense cold, steady output becomes a deciding factor for comfort and the electricity bill. According to NEEP data for this system (AHRI 216621490):

• Nominal cooling capacity: 30,000 BTU

• Heating at -8°C: 25,000 BTU/h (COP 2.4)

• Heating at -15°C: 32,000 BTU/h (COP 1.85)

• Heating at -30°C: up to 22,000 BTU/h (COP 1.62)

• SEER2 16.0, EER2 11.0, HSPF2 (region IV) 9.6

• Inverter technology, for continuous, precise modulation

This stability means a steadier temperature, without sudden swings, even during long cold spells.

Choosing R-454B refrigerant: a technical and strategic decision

R-454B is more than an environmental argument. It is a logical step forward in HVAC, combining safety, efficiency and regulatory compliance. Its global warming potential of 466, compared with 2,088 for R-410A, makes it a sound choice for owners who want to protect their investment over time.

In practical terms, this means:

• Compliance with current requirements

• Safe integration, with the leak detection required for A2L refrigerants

• An asset for residential and commercial projects

The ADD-ON approach according to AirGreen: what we see in the field

Typical scenarios in Greater Montreal

We often work on buildings with the following characteristics:

• An electric furnace that still works but is costly to run

• Well-designed central ductwork, sometimes underused

• Owners who want better efficiency without major work

The CANAIR 4CDH R-454B "ADD-ON" Central Heat Pump fits these configurations. The heat pump then covers most of the heating needs, with the furnace only called on during deep cold.

Mistakes we systematically avoid

Experience has taught us that a successful ADD-ON project depends as much on what you avoid as on what you do:

• Undersized airflow, which costs performance

• Poor electrical coordination, especially with the furnace's heating elements

• Ignoring static pressure, which is crucial to real performance

At AirGreen, every installation starts with an on-site assessment, so that performance meets expectations over the long term.

Acoustic comfort, everyday reliability and simple maintenance

Discreet operation

Comfort is not only about temperature. The CANAIR 4CDH stands out for its controlled sound level (60.5 dB(A) outdoors). In densely populated Montreal neighbourhoods, this often makes the difference.

Indoors, the existing furnace blower moves the air across the coil. AirGreen checks and adjusts that airflow at start-up, for smooth circulation without abrupt changes.

Designed with maintenance in mind

For owners and managers, easy maintenance is a key factor:

• CEB-36MX1721 cased coil (17.5 × 21 × 23.5 in.), accessible for inspection and cleaning

• 3/8 in. and 3/4 in. refrigerant line connections

• Automatic defrost of the outdoor unit and A2L refrigerant leak detection

LogisVert aid, warranties and long-term value

Hydro-Québec LogisVert aid

This combination (AHRI 216621490) is on Hydro-Québec's LogisVert list of October 27, 2026, with an indicative amount of $3,000. Only Hydro-Québec confirms the aid granted. At AirGreen, we support our clients at every step:

• Technical check of the model's eligibility

• Documents needed for the application

• Compliance with the required technical criteria

Clear warranties, backed by a rigorous installation

• 10 years on the compressor and parts

• 6 years on labour, directly from the distributor, with an option to extend the labour warranty

These warranties are worth the most when backed by a compliant installation done by qualified professionals.

Why trust AirGreen with your project

• Experienced refrigeration technicians specialized in central systems, working under AirGreen's RBQ licence 5645-9605-01

• Transparent prices, confirmed before the work begins

• $5M civil liability insurance

• Hands-on expertise in Montreal, Laval, Longueuil, the North Shore and the South Shore

Every project is treated as a unique case, with technical choices that are justified and clearly explained. To see installations completed by our teams, visit our Our projects page.

Take action with AirGreen

If you are considering an ADD-ON central heat pump that performs, lasts and truly suits Quebec's climate, AirGreen looks at your existing system, your energy goals and your technical constraints to offer a solution that is coherent, durable and cost-effective.

Phone: 514-316-2973
Email: sales@airgreen.ca

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