CANAIR 4C28 Heat Pump - R454B | 2-Zone - 18,000 BTU Outdoor
The CanAir 4C28 R454B 18 000 multi-zone heat pump heats and cools 2 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.
2 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 perfect balance of power, versatility and performance for the Quebec climate
At AirGreen , we believe that a good heat pump isn't just defined by its technical numbers, but more importantly by its ability to deliver long-lasting, quiet, and energy-efficient comfort year-round—even when the mercury dips well below zero.
The CANAIR 4C28 Heat Pump - R454B | 2-Zones - 18,000 BTU Outdoor perfectly embodies this philosophy. Designed to withstand the rigors of the Quebec climate, it combines cutting-edge technology , exceptional versatility and proven durability . The result: a system capable of heating efficiently to -30°C while maintaining a discreet noise level and impressive energy efficiency.
Intelligent design, thought out for total comfort
The heart of this heat pump is Inverter technology , an innovation that allows the compressor to automatically adapt its speed according to actual demand. Unlike traditional systems that operate in stop-and-start cycles, Inverter technology maintains the temperature constantly and evenly.
Concrete benefits for your home:
-
Maximum energy efficiency : the heat pump only consumes the energy needed at any given moment, significantly reducing your electricity bill.
-
Absolute comfort : no more unpleasant temperature fluctuations - the room always remains at the right temperature, regardless of the time of day or night.
-
Soothing silence : Thanks to a finely modulated compressor and anti-vibration components, the system operates almost silently, ideal for bedrooms or home offices.
-
Increased durability : Fewer restart cycles mean less mechanical wear and therefore a longer lifespan.
Exceptional performance, even below -30°C
The CANAIR 4C28 was specially designed for the cold climate of Quebec , where winters demand reliable and robust systems. Capable of providing constant heating down to -30 °C , it ensures your comfort even during the most intense winter storms.
Heating cables built into the base and around the compressor prevent ice buildup, ensuring a smooth, stress-free startup. Additionally, its automatic restart system resumes normal operation after a power outage, retaining all previous settings.
In figures:
-
Nominal heating capacity at -15°C: 18,000 BTU
-
Coefficient of Performance (COP): 1.92
-
HSPF2: 10.4
-
ENERGY STAR® Certified (Cold Climate)
These values place the CANAIR 4C28 series among the best in its class, offering excellent energy efficiency and reliable performance throughout the cold season.
A perfectly balanced dual-zone system
The 4C28MC318H21 model is an outdoor unit designed to supply two separate indoor areas , for example a bedroom upstairs and a living room downstairs. With this configuration, you can:
-
Independently control the temperature of each zone , for personalized comfort.
-
Reduce energy consumption by avoiding unnecessary heating or cooling of unoccupied rooms.
-
Optimize air distribution in spaces of different sizes with intelligent airflow.
This flexibility makes the CANAIR 4C28 2-Zone ideal for mid-sized homes, condos or duplexes where the comfort of every space is a priority.
Features that make life easier
Every detail of this heat pump has been designed to improve your comfort and reduce maintenance constraints:
Advanced Features:
-
Turbo mode : reaches the desired temperature in record time.
-
Silent Mode : For virtually inaudible operation, perfect for nighttime.
-
“Follow Me” function : adjusts the temperature according to the position of the remote control.
-
Self-cleaning : eliminates residual moisture inside the system to prevent mold growth.
-
Cold draft prevention : ensures pleasant heating from the start.
-
Optional Wi-Fi technology : manage your system remotely from your smartphone.
-
TU1 copper coil : recognized for its exceptional corrosion resistance and optimal thermal conductivity.
By combining these features, the heat pump provides a healthier, quieter and more pleasant indoor environment , while minimizing maintenance needs.
Energy efficiency among the best on the market
The CANAIR 4C28 's performance speaks for itself:
-
SEER2: 25.0 (air conditioning efficiency index)
-
EER2: 15.0 (immediate energy efficiency)
-
HSPF2: 10.4 (seasonal heating efficiency)
These figures reflect minimal consumption for maximum power . By using the environmentally friendly R-454B refrigerant , this heat pump actively contributes to reducing your carbon footprint while maintaining impressive heating power, even in extreme conditions.
Quebec manufacturing focused on quality
CANAIR heat pumps are proudly designed for Quebec , by experts who understand our specific heating and cooling needs. For over 50 years, Descair , the manufacturer and distributor, has offered durable products tested under the most demanding conditions.
The 4C28 series illustrates this local know-how: a perfect balance between technology, reliability and energy efficiency , supported by an exceptional warranty.
Professional AirGreen installation: expertise and peace of mind
At AirGreen , we stand out for our installation rigor and our transparent customer approach . Each project is entrusted to certified refrigeration engineers , members of the CMMTQ , trained to ensure a clean, safe and optimal installation.
Our commitments:
-
✅ Free on-site assessment , no obligation.
-
✅ No deposit required — you only pay when you are completely satisfied.
-
✅ Transparent and guaranteed prices , no nasty surprises.
-
✅ Fast and professional after-sales service .
We carefully analyze the insulation, the configuration of your space and the thermal needs to ensure an installation perfectly adapted to your environment.
Solid guarantees, reflecting CANAIR quality
Because a heat pump is a long-term investment, CANAIR and AirGreen offer some of the most comprehensive warranties on the market :
-
10 years on the compressor
-
10 years on parts
-
Up to 10 years on labor (with optional extension)
These guarantees reflect total confidence in the reliability of the product and in the quality of the AirGreen installation.
An ecological solution for a greener future
By choosing the CANAIR 4C28 , you are contributing to a more environmentally friendly home . Operating entirely on electricity, this system significantly reduces greenhouse gas emissions compared to appliances running on natural gas.
R-454B refrigerant has a reduced global warming potential (GWP) , aligned with new environmental regulations.
It is a technology that is fully in line with Quebec's energy transition — a solution that is both ecological and economical .
LogisVert grant: up to $2,112 in rebates
Thanks to the Quebec government's LogisVert program, you can benefit from a provincial grant of up to $2,112 for the installation of this ENERGY STAR® certified model.
The AirGreen team guides you step by step through the administrative process , from verifying your eligibility to submitting your application, in order to maximize your savings.
Why choose AirGreen?
-
100% Quebec company , proudly established in Montreal, Laval and on the South Shore .
-
Highly qualified technicians passionate about the HVAC profession.
-
Recognized expertise in the installation of high-efficiency wall-mounted heat pumps.
-
Complete service : installation, maintenance, repair and replacement.
-
Local and human support , with customer service that is always accessible and responsive.
At AirGreen, each client is supported as a long-term partner. Our mission: to provide lasting comfort and tangible savings, while maintaining the highest quality standards.
In summary: the CANAIR 4C28, a smart and sustainable choice
The CANAIR 4C28 Heat Pump - R454B | 2-Zones - 18,000 BTU is much more than just a heating and cooling unit.
It's an investment in comfort, performance, and peace of mind . Thanks to its exceptional efficiency, robust design, and compatibility with subsidy programs, it represents one of the best value options on the Quebec market.
Choose sustainable performance . Trust AirGreen to transform your home into a smart, quiet, and eco-friendly space of comfort.
Get your free estimate today
📞 514-316-2973
📧 sales@airgreen.ca
📍 4951 Rue Ste-Catherine Est, Montreal
📍 1370 Rue Joliot-Curie, Boucherville (South Shore)
AirGreen — Heat Pumps, Air Conditioning & Heating.
Your comfort, our expertise.
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 2 heads.
Can I mix head sizes?
Yes. The “Zones” menu offers 8 combinations, from 6+6 to 12+12 (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; 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.