CANAIR 4C28 Heat Pump - R454B | 3-Zone - 18,000 BTU Outdoor
The CanAir 4C28 R454B 18 000 multi-zone heat pump heats and cools 3 rooms with a single outdoor unit. it delivers 20,000 BTU/h at −8 °C, heats down to −30 °C and qualifies for a $2,400 LogisVert grant. Installed by AirGreen in Montréal, Laval, Longueuil, the North Shore and the South Shore.
3 rooms, one outdoor unit.
Compared with the 48 multi-zone systems of 18,000 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 3 heads and modulates from 5,700 to 20,000 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 105 % 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 48 multi-zone systems of 18,000 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 ideal triple-zone solution for four-season Quebec comfort
At AirGreen, we have a clear belief: every home in Quebec deserves absolute comfort, summer and winter. The CANAIR 4C28 - R454B | 3-Zone - 18,000 BTU Outdoor heat pump represents a perfect combination of performance, energy efficiency, and adaptability to our province's extreme climate. Designed for multi-zone homes , it ensures a stable and pleasant temperature in three separate rooms, while reducing the home's overall energy consumption.
A design thought out for Quebec's climate
The CANAIR 4C28 is the result of local expertise, developed to meet the needs of residents of Montreal, Laval, Longueuil, the North Shore and the South Shore . This Cold Climate V6.1 model, ENERGY STAR® certified, offers an impressive heating capacity down to -30°C , which places it among the most robust systems on the Quebec market.
Thanks to its new generation R-454B refrigerant gas , the 4C28 significantly reduces its environmental impact, while maximizing its energy efficiency. This A2L type refrigerant is not only more environmentally friendly, but also safer and more stable in extreme conditions.
Performance, efficiency and versatility
Inverter technology: comfort without compromise
The integrated inverter technology allows intelligent control of compressor power according to actual demand. Result:
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Significant reduction in energy consumption ,
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Constant temperature maintenance ,
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Progressive start-up without consumption peaks ,
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Remarkably low noise level , for optimal acoustic comfort.
This triple-zone heat pump is designed to serve up to three separate indoor units (compatible models: 4C28SEH06H21, 4C28SEH09H21, 4C28SEH12H21). Each unit can operate independently, providing precise management tailored to your daily routines.
Impressive technical characteristics
| Specifications | Key data |
|---|---|
| Cooling capacity | 18,000 BTU |
| Refrigerant gas | R-454B (A2L) |
| Energy efficiency | SEER2: 25.0 / HSPF2: 10.4 / EER2: 15.0 |
| Heating range | Up to -30°C |
| Supply voltage | 220V |
| Outdoor noise level | 61.5 dB(A) |
| Number of zones | 3 (Triple Zone) |
| Wi-Fi | Optional |
| Guarantee | 10 years compressor / 10 years parts / 6 years labor, straight from the distributor (10-10-10 option available) |
| External dimensions (LxWxH) | 37.24 x 16.14 x 31.89 in |
These figures reflect a rare combination: exceptional heating power and energy efficiency among the highest on the market .
Advanced features for comfort
1. Heating and air conditioning down to -30°C
Designed specifically for Quebec's harsh winters, the 4C28 provides stable heating even when the mercury plummets.
2. Turbo Mode
Quickly reach your desired temperature, whether heating or cooling—an ideal asset after a long, icy winter day or a summer heatwave.
3. Self-Cleaning Function
The indoor and outdoor coils clean and dry themselves, preventing the formation of mold and unpleasant odors .
4. Silent Mode
A peaceful environment thanks to low-decibel ventilation technology. Perfect for bedrooms or home offices.
5. “Follow Me” function
The sensor integrated into the remote control adjusts the temperature according to your actual position in the room , ensuring unparalleled precision.
6. Prevention of cold draft
When heating mode is started, the system prevents the diffusion of cold air – an essential consideration for winter comfort.
7. Outdoor heating cables
These cables prevent ice buildup around the compressor, promoting smooth starting even in very cold weather .
8. A2L refrigerant detection
In case of leakage, the indoor unit will automatically shut down and display an error code (EC) to ensure safety.
9. TU1 copper coil
A high quality material offering increased corrosion resistance and superior durability.
10. Wi-Fi control (optional)
Control your system remotely via your smartphone—convenient and modern.
The versatility of multi-zone: three zones, one comfort
The 4C28MC318H21 model allows you to connect up to three indoor units , serving multiple rooms with a single compact outdoor unit. Whether it's a living room, bedroom, or office—each area benefits from comfort tailored to its use.
This modularity is particularly advantageous in multi-story houses, condos or duplexes, where temperature distribution can be uneven. Thanks to CANAIR , the temperature remains uniform, while maintaining controlled electricity consumption .
A guarantee that lives up to CANAIR quality
The CANAIR 4C28 heat pump is covered by a 10-year warranty on parts and compressor and a 6-year labor warranty straight from the distributor, and labor can be extended to 10 years on labor . This exceptional coverage reflects CANAIR and AirGreen's confidence in the durability of the product and the quality of the installation provided by our RBQ-certified professional refrigeration engineers (5645-9605-01) .
AirGreen Installation and Service: Peace of Mind Above All
At AirGreen , we stand out for our transparent and human approach:
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100% free on-site estimate before any project;
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No advance or deposit – you only pay at the end, once you are fully satisfied;
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Clear and fixed prices , no surprises at the end of the project;
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Specialized and experienced technicians , ensuring impeccable installation and rapid after-sales service.
Our teams operate throughout Montreal, Laval, the South Shore (Boucherville, Longueuil, Saint-Hubert) and the North Shore (Laval, Terrebonne, Blainville) to offer tailor-made service.
An ecological and economical choice
Installing a CANAIR heat pump is a concrete step towards the energy transition . The R-454B refrigerant reduces greenhouse gas emissions, while the system's high efficiency allows for significant energy savings throughout the year .
By opting for the 4C28 series , you also benefit from provincial LogisVert subsidies of up to $2,112 , an additional advantage for owners wishing to improve the energy performance of their home.
Conclusion: The triple-zone heat pump that redefines residential comfort
Powerful, energy-efficient and adapted to the Quebec climate, the CANAIR 4C28 - R454B | 3-Zones - 18,000 BTU Outdoor heat pump is the smart choice for modern homes .
Combined with AirGreen 's installation and service expertise, it ensures optimal comfort, exceptional reliability and lasting energy savings.
Call us today at (514) 316-2973 or visit our showroom in Montreal or Boucherville to get your free estimate and discover why so many families trust AirGreen for their daily comfort.
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: 20,000 BTU/h at −8 °C, 19,000 at −15 °C and 10,000 at −30 °C.
How many heads can I connect?
Up to 3 on this outdoor unit. This product is configured for 3 heads.
Can I mix head sizes?
Yes. The “Zones” menu offers 6 combinations, from 6+6+6 to 9+9+9 (in thousands of BTU). Each head is sized for its room.
How much is the LogisVert grant?
$2,400 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 3712085. 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 10,000 BTU/h with a COP of 1.3.
Is it noisy?
Indoors, the reference head goes down to 19.5 dB(A). Outdoors, 62 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.