CANAIR 4C28 Heat Pump - R454B | 4-Zone - 48,000 BTU Outdoor
The CanAir 4C28 R454B 48 000 multi-zone heat pump heats and cools 4 rooms with a single outdoor unit. it delivers 45,000 BTU/h at −8 °C, heats down to −30 °C and qualifies for a $5,400 LogisVert grant. Installed by AirGreen in Montréal, Laval, Longueuil, the North Shore and the South Shore.
4 rooms, one outdoor unit.
Compared with the 82 multi-zone systems of 48,000 BTU we sell. Every number on this page carries its source.
The parts that make a multi-zone system.
Tap a part to learn more.
Outdoor unit
One compressor for the whole house. It supplies up to 6 heads and modulates from 13,000 to 45,000 BTU/h depending on what the rooms call for (NEEP).
Base pan heater
A heater keeps the outdoor unit’s base pan free of ice below 1 °C and during defrost (NEEP).
Refrigerant lines
One pair of lines per head.
Indoor heads
One head per room, each with its own remote and temperature. The combination is chosen in the “Zones” menu.
Control
Each zone is set separately.
Turn rooms on and off. Watch the power being shared.
One outdoor unit supplies every head: when several rooms call at once, they share its capacity. Pick an outdoor temperature.
Tell us your rooms. We tell you if this size is enough.
Pick the number of rooms and their size. The estimate targets a −15 °C day; it is a guide, the real calculation is done room by room at your home.
The whole series at a glance: find the box that fits you.
Each box is a product: the outdoor unit’s size, and the number of heads.
At −15 °C, it still delivers 97 % of its rated capacity.
Tap a temperature: certified capacity, efficiency and the cost of one hour of heating.
It slows down, it speeds up: the certified modulation range
Light bar: from minimum to maximum capacity. Dark mark: the rated value.
At every temperature, cheaper than baseboards.
Cost of one hour at full output, for the same heat delivered. Hydro-Québec Rate D, second tier: 11.142 ¢/kWh.
The official ratings, on the same scales as before.
SEER2, HSPF2 and EER2 come from the AHRI certification. The mark shows the median of the same-size multi-zone systems we sell.
A grant you can calculate, not guess.
The capacity at −8 °C comes from Hydro-Québec’s list of October 1, 2026. $120 per 1,000 BTU/h is the rate for ENERGY STAR cold-climate heat pumps (guide v1.10).
Where it ranks among same-size multi-zone systems.
Compared with the 82 multi-zone systems of 48,000 BTU we sell, using the LogisVert list figures. Weaknesses too, said plainly.
Against three other brands in its class.
Same rated size, other manufacturers. Pick the opponent.
One multi-zone or several wall units? Both sides, honestly.
We compare both options on your floor plan during the estimate.
What to know before installing a multi-zone system.
Dimensions, wiring and lines, drawn. Then our six steps.
The outdoor unit, dimensioned
One circuit for the whole house
Published sound levels, on one scale.
We use the outdoor figure to choose where the unit goes.
What is particular about this machine.
Only facts published by ENERGY STAR, NEEP or the manufacturer.
Every number, and where it comes from.
Each line carries its source; a line with no published value is not shown.
The manufacturer’s documentation, as PDF.
Everything we have written about this system.
The perfect balance between power, reliability and performance for the Quebec climate
Innovation serving Quebec comfort
At AirGreen , we have chosen to include in our catalog the CANAIR 4C28 – R454B heat pump (model 4C28MC648H21) , a 48,000 BTU multi-zone outdoor unit that redefines the standards of domestic comfort in residential heating and air conditioning .
Designed for Quebec's harsh winters and humid summers, this ductless heat pump stands out for its exceptional energy efficiency, installation versatility and long-term durability .
The 4C28 series embodies the new generation of Cold Climate systems adapted to our northern conditions, offering reliable heating down to -30°C without compromising performance or indoor comfort.
Advanced technology designed for efficiency
The controlled power of the Inverter system
The technological heart of the CANAIR 4C28 is based on Inverter technology , an intelligent system that automatically adjusts the compressor frequency according to the actual needs of the home.
This allows:
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Significantly reduce energy consumption and therefore monthly costs.
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Maintain a stable and uniform temperature , without sudden variations.
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Provide fast and precise heating and cooling .
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Ensure quiet operation , ideal for bedrooms and living spaces.
A system designed for extreme conditions
The 4C28MC648H21 works with R-454B refrigerant , a new generation ecological gas, classified A2L, more environmentally friendly than the old R-410A refrigerants.
ENERGY STAR® (Cold Climate) certified, it boasts impressive energy performance:
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SEER2: 23.0
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HSPF2: 11.0
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EER2: 12.0
Even in the most intense cold, the heat pump maintains optimal heating capacity , thanks to its heating cables integrated around the compressor and its anti-frost technology , guaranteeing a smooth start every time.
Unparalleled installation flexibility
Up to 4 independent comfort zones
With its Quad Zone configuration (4 zones) , the CANAIR 4C28 offers the possibility of connecting several indoor units depending on the configuration of the home.
This means that each space—living room, bedrooms, basement, or office—can be independently air-conditioned or heated, for tailored comfort.
Compatible indoor units include models:
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4C28SEH06H21 (6,000 BTU)
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4C28SEH09H21 (9,000 BTU)
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4C28SEH12H21 (12,000 BTU)
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4C28SEH18H21 (18,000 BTU)
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4C28SEH24H21 (24,000 BTU)
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4C28SEH33H21 (33,000 BTU)
This modularity allows our certified installers to adapt each project to the surface area and layout of the rooms , whether for a bungalow, a townhouse, a duplex or a condo .
A design thought for tranquility
Quiet, reliable and durable
The CANAIR 4C28 combines manufacturing quality and Quebec engineering , offering an exterior noise level of only 65 dB(A) .
Thanks to the “Silent Mode” function , the indoor units reduce noise to a minimum, creating a soothing environment, day and night.
TU1 copper coils provide excellent corrosion resistance, while the self-cleaning function prevents mold growth and improves indoor air quality.
An unmatched guarantee for your peace of mind
CANAIR and AirGreen offer a full warranty of up to 10 years on parts and compressor , as well as an optional 10-year extended warranty on labor , demonstrating the exceptional reliability of the system.
| Type of guarantee | Compressor | Pieces | Workforce |
|---|---|---|---|
| Standard | 5 years | 5 years | — |
| Additional | 10 years | 10 years | 10 years (optional) |
These guarantees reflect a concrete commitment to sustainability and customer satisfaction.
An energy-efficient choice for a sustainable future
Fewer emissions, more savings
By replacing an old natural gas or oil system with a CANAIR 4C28 heat pump , you help reduce your greenhouse gas emissions while lowering your annual energy costs .
The electricity used by these systems is clean and renewable , which fits perfectly with Quebec's environmental vision.
Thanks to the LogisVert provincial grant ($5,280 – updated July 2025) , investing in a heat pump of this range becomes particularly advantageous for owners on the North Shore, South Shore, Montreal, Laval and Longueuil .
A professional installation by AirGreen
Local expertise, satisfaction guaranteed
Every installation carried out by AirGreen is carried out by RBQ certified refrigeration engineers (#5645-9605-01) experienced in multi-zone systems.
Our approach is distinguished by:
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A free on-site estimate , always without obligation.
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Transparent and detailed prices , before work begins.
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No deposit required — you only pay once the job is completed and your satisfaction is confirmed.
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Fast after-sales service , thanks to our teams based in Montreal (4951 Ste-Catherine Est) and Boucherville (1370 Rue Joliot-Curie, local 712).
Each installation project is unique, and our technical advisors take care to size the heat pump according to the building's configuration, thermal needs and the client's budget.
Main technical characteristics – model 4C28MC648H21
| Specifications | Values |
|---|---|
| Cooling capacity | 48,000 BTU |
| Heating capacity | 49,000 BTU |
| Operating temperature | Up to -30°C |
| SEER2 / HSPF2 / EER2 | 23.0 / 11.0 / 12.0 |
| Refrigerant | R-454B (A2L – ecological) |
| Tension | 220 V |
| Outdoor noise level | 65 dB(A) |
| Wi-Fi | Optional |
| External dimensions (L × D × H) | 37.48 × 16.34 × 52.48 in |
| Supported areas | 4 (up to 6 maximum) |
| AHRI Model | 215449733 |
| Certification | ENERGY STAR® Cold Climate V6.1 |
Why choose AirGreen for your CANAIR 4C28 heat pump?
Because we believe that comfort is not limited to technical performance.
It also means peace of mind , personalized support and respect for commitments .
At AirGreen , each installation represents a promise:
That of a professional, fast and human service, worthy of the quality of the products we install.
Conclusion: the ideal heat pump for an extreme climate
The CANAIR 4C28 – R454B (4 zones, 48,000 BTU) embodies the perfect fusion of technology, energy performance and adaptability .
It is suitable for both single-family and multi-family homes, providing a reliable and durable solution for high-efficiency heating and cooling .
AirGreen – Your trusted HVAC partner in Montreal, Laval, Longueuil, on the North Shore and the South Shore.
Call us at 514-316-2973 or write to sales@airgreen.ca for a free on-site estimate .
What people ask us about multi-zone systems.
Can I heat one room and cool another at the same time?
No. On a multi-zone system like this one, every head works in the same mode, heating or cooling. Each room still keeps its own set temperature.
What happens when every room calls for heat?
They share the outdoor unit’s capacity: 45,000 BTU/h at −8 °C, 47,000 at −15 °C and 24,600 at −30 °C.
How many heads can I connect?
Up to 6 on this outdoor unit. This product is configured for 4 heads.
Can I mix head sizes?
Yes. The “Zones” menu offers 51 combinations, from 6+6+6+6 to 12+18+18+18 (in thousands of BTU). Each head is sized for its room.
How much is the LogisVert grant?
$5,400 according to Hydro-Québec’s list of October 1, 2026. The grant never exceeds 100 % of the cost before taxes; apply within 9 months of installation.
Is it ENERGY STAR certified?
Yes, cold climate, ID 3712093. It also meets the ENERGY STAR Most Efficient criteria, according to the ENERGY STAR database.
Down to what temperature does it heat?
Down to −30 °C. At −30 °C, it still delivers 24,600 BTU/h with a COP of 1.27.
Is it noisy?
Indoors, the reference head goes down to 19.5 dB(A). Outdoors, 65 dB(A): we place the unit away from bedroom windows.
Why a multi-zone instead of several wall units?
One outdoor unit on the wall and one circuit. In return, the rooms share the capacity, and if the outdoor unit stops, every zone stops.
What does the warranty cover?
Our sheet lists 10 years on the compressor and 10 years on parts; labour is not included by the manufacturer. AirGreen extended warranty: possible.
A multi-zone system is planned room by room. At your home.
We measure every room, draw the line route and choose the right head for each zone. The on-site estimate is free and the quote arrives within 24 h.