CANAIR 4C28 Heat Pump - R454B | 6-Zone - 48,000 BTU Outdoor
The CanAir 4C28 R454B 48 000 multi-zone heat pump heats and cools 6 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.
6 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 excellence of multi-zone comfort for Quebec winters
At AirGreen , we believe that true comfort comes from a stable temperature, clean air and consistent energy efficiency, even when the mercury drops below -25°C. This is exactly what the CANAIR 4C28 Heat Pump - R454B | 6-Zones - 48,000 BTU Outdoor offers — a high-performance heating and cooling system, designed specifically for Quebec's harsh climate .
Combining cutting-edge technology , exceptional energy efficiency , quiet operation and intelligent design , this model represents the quintessence of Quebec know-how in HVAC (heating, ventilation and air conditioning) systems .
A heat pump designed for the Quebec climate
The CANAIR 4C28 stands out for its robustness and its ability to maintain constant comfort, even at -30°C . Designed and distributed by a Quebec company, it was developed with in-depth knowledge of local needs:
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Optimized thermal insulation for residential buildings in Quebec;
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Reinforced components to withstand repeated freeze-thaw cycles;
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Cold Climate V6.1 technology , certifying its effectiveness in northern zones.
This system is aimed at those looking for a sustainable, economical and ecological solution , suitable for single-family homes as well as multi-unit buildings , commercial offices or intergenerational residences .
Latest generation inverter technology
The heart of the CANAIR 4C28 's performance lies in its Inverter technology . Unlike traditional systems that operate in on/off cycles, this technology adjusts the compressor speed in real time according to temperature requirements.
The advantages are multiple:
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Up to 30% energy savings thanks to intelligent power modulation;
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Stable and homogeneous temperature , without sudden variations;
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Less mechanical wear , which extends the life of the device;
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Minimal noise level , ideal for bedrooms or work spaces.
Thanks to this precise control, the CANAIR 4C28 heat pump maintains optimal comfort continuously , while limiting its electricity consumption to what is strictly necessary.
Superior energy efficiency
With a SEER2 of 23.0 , an HSPF2 of 11.0 and an EER2 of 12.0 , the CANAIR 4C28 ranks among the most efficient systems in its class. These values demonstrate exceptional energy efficiency , ensuring both substantial savings and a reduced environmental impact.
Additionally, this model is ENERGY STAR® (Cold Climate) certified, confirming that it meets the highest energy efficiency standards in Canada .
Tailor-made comfort thanks to multi-zone flexibility
The 4C28MC648H21 outdoor unit can power up to six independent indoor units , ranging from 6,000 to 33,000 BTU each . This modularity offers exceptional flexibility to adapt comfort room by room:
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Master bedroom warmer in winter;
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Air-conditioned lounge in summer;
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Temperate basement in all seasons;
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Office or workshop with stable temperature all year round.
Each zone is individually controlled, allowing each member of the household to personalize their comfort while optimizing overall energy consumption .
Smart features for well-being
The CANAIR 4C28 series is packed with features designed to simplify everyday life:
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Turbo Mode : Quickly reaches the desired temperature, ideal for immediate comfort after a long day.
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Silent Mode : Ultra-quiet operation, perfect for bedrooms or relaxation areas.
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Self-cleaning : Automatic drying of the indoor and outdoor coil to prevent mold growth and improve air quality.
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Follow Me function : the remote control becomes a mobile temperature sensor for even more precise control.
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Automatic restart : the device automatically resumes its settings after a power failure.
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External heating cables : prevent ice from forming around the compressor for smooth startup, even in extreme cold.
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Automatic A2L refrigerant leak detection : built-in safety that shuts down the system in the event of an anomaly.
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Wi-Fi (optional) : allows you to manage the system remotely via smartphone.
These features make the CANAIR 4C28 powerful, practical and safe —a perfect combination for demanding owners.
A new generation of environmentally friendly refrigerant: R-454B
The use of R-454B refrigerant gas marks a major turning point in the fight against climate change. This A2L -rated refrigerant has a global warming potential (GWP) 78% lower than R-410A, while maintaining equivalent or even higher efficiency.
In other words, you benefit from a high-performance system while significantly reducing your carbon footprint . The CANAIR 4C28 is therefore part of a responsible energy transition approach, supported by government programs such as LogisVert , which offer subsidies of up to $5,280 for this model.
A guarantee that meets your expectations
Because the reliability of an HVAC system relies as much on technology as on the manufacturer's confidence, the CANAIR 4C28 is backed by an exceptional 10-year warranty on the compressor and parts and 6 years on labor, straight from the distributor, with a possible extension to 10 years on labor .
This level of coverage ensures total peace of mind , reinforced by the expertise of AirGreen certified technicians , who take care of installation, maintenance and after-sales service.
AirGreen-designed installations: quality, rigor and expertise
Our expert teams carry out each installation with meticulous precision. Take, for example, a recent project in Boucherville : an intergenerational home equipped with a CANAIR 4C28 - R454B multi-zone system.
The installation, spread over six areas (living room, three bedrooms, basement and insulated garage), allowed:
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A perfectly balanced temperature throughout the house;
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A 35% reduction in annual energy costs ;
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Remarkably quiet operation (only 65 dB outside);
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Smooth temperature stability , even at -28°C in January.
This type of achievement clearly illustrates our promise: high-performance systems, installed with precision, and supported by a human, transparent and professional service .
Tangible benefits for every owner
Choosing the CANAIR 4C28 - R454B means investing in:
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A new generation energy solution , compliant with Quebec environmental standards;
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Personalized comfort thanks to multi-zone technology;
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Increased durability thanks to high-quality components;
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Energy savings of up to 40% compared to a traditional system;
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A clean aesthetic , with discreet and elegant wall units.
At AirGreen, we understand that your home is more than just a place to live: it's a space where comfort must be constant, quiet, and uncompromising.
A Quebec company proud of its roots
Distributed by DesCair , a family business founded in 1971, the CANAIR 4C28 is a product entirely designed for the Quebec market . It is a symbol of local innovation, supported by decades of experience and a network of passionate professionals.
By choosing AirGreen and Canair, you are not only supporting the local economy , but also a business model that values quality, reliability and transparency at every stage of the service.
AirGreen: Your Trusted HVAC Partner
We believe that every installation should be synonymous with performance and serenity . At AirGreen, our values are simple:
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No advance, no deposit , payment only once the customer is 100% satisfied;
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Free, on-site estimates , with no surprises or hidden costs;
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Certified, experienced and punctual refrigeration technicians ;
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Fast after-sales service , with parts available locally.
We operate throughout Montreal, Laval, Longueuil, on the North Shore and the South Shore , with a single objective: to offer our customers the best of Quebec comfort .
In summary
The CANAIR 4C28 Heat Pump - R454B | 6-Zones - 48,000 BTU Outdoor embodies the new generation of HVAC solutions combining power, efficiency, ecology and custom comfort . Designed to withstand Quebec's harsh winters, it offers stable performance, an elegant design and remarkably quiet operation.
At AirGreen, we don't just sell a product—we deliver a lasting comfort experience, backed by the passion and expertise of a team dedicated to your satisfaction.
Warranty: 10 years on the compressor, 10 years on parts and 6 years on labor, straight from the distributor.
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 6 heads.
Can I mix head sizes?
Yes. The “Zones” menu offers 62 combinations, from 6+6+6+6+6+6 to 12+12+12+12+12+12 (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. 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.