Zephyr R-454B Dual Zone Heat Pump | 36,000 BTU Compressor | Montreal, Laval, Longueuil, South Shore & North Shore
The Zephyr Hi Multi Xtreme R454B 36 000 multi-zone heat pump heats and cools 2 rooms with a single outdoor unit. it delivers 22,600 BTU/h at −8 °C, heats down to −25 °C and qualifies for a $2,712 LogisVert grant. Installed by AirGreen in Montréal, Laval, Longueuil, the North Shore and the South Shore.
2 rooms, one outdoor unit.
Compared with the 141 multi-zone systems of 36,000 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 4 heads and modulates from 14,345 to 33,850 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 100 % 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 141 multi-zone systems of 36,000 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
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.
Everything we have written about this system.
Powerful and quiet, without compromise
The dual-zone heat pump designed for our climate: Zephyr 36,000 BTU, Quebec-style efficiency
At AirGreen, we know that heating and cooling needs in Quebec are unique. Our harsh winters and increasingly hot summers require equipment that is powerful , reliable , and quiet . That's why we selected and approved the Zephyr R-454B DoubleZone Heat Pump | 36,000 BTU Compressor , a multi-zone model that embodies the perfect balance between energy performance and quiet sound. Designed for our local standards, this unit fully meets Canadian quality standards . Let's discover together why this solution is a benchmark in Greater Montreal, Laval , Longueuil , on the South Shore and the North Shore .
Performance designed for Quebec residential comfort
The Zephyr R-454B with 36,000 BTU compressor is a dual-zone model capable of efficiently heating two separate indoor spaces with a single compressor. Here are the features that make it a must-have:
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Heating capacity to -25°C : ideal for facing Montreal winters.
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SEER2 of 22.0 and HSPF2 of 10.0 : exceptional energy efficiency.
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R-454B refrigerant : a more environmentally friendly technology.
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Inverter technology : allows continuous adjustment of power according to actual needs.
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ENERGY STAR® – Cold Climate : Certified for optimal performance even in extreme cold.
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Multiple inner head options : ZE09CB25I, ZE12CB25I, ZE18CB25I and ZE24CB25I, for a perfect fit for every room.
A quiet unit designed for home tranquility
In a home, comfort doesn't just come from temperature: silence is just as precious. The Zephyr understands this:
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Exterior noise level of 59 dB(A) : a remarkably quiet performance for its power.
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Possibility of installation with very low noise wall heads.
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High-performance motor and optimized sound insulation.
Many of our customers, from Montreal to Boucherville , point out that they can't even hear the device once it's on—a real guarantee of comfort for nighttime or teleworking spaces.
A flexible system that grows with you
Although it comes in dual zone , the Zephyr R-454B is capable of handling up to four zones (quad zone configuration). This means that your initial investment remains scalable:
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Starting with two pieces? No problem.
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Want to add two zones later? The unit can support them without having to replace the compressor.
At AirGreen, we see this flexibility as a smart response to the needs of a transforming home, particularly for growing families or future renovation projects.
Canadian standards and local adaptation: an AirGreen exclusive
This model was not selected at random. As a Montreal -based company, we demand from our products:
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A design resistant to extreme cold , tested and validated by our teams.
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Compatibility with government subsidies , such as Hydro-Québec’s LogisVert program.
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Installation by certified refrigeration engineers , trained for this particular model.
The Zephyr R-454B 36,000 BTU meets all of these criteria, making it a solution validated by AirGreen for all residences on the South Shore , the North Shore , from Longueuil to Laval .
An installation signed AirGreen: expertise, transparency and service
Our commitments during each installation:
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Free on-site estimate : We don't charge anything until you receive a full assessment.
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Fixed prices, no deposit required : you only pay once the work is completed to your complete satisfaction.
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Experienced technicians : all our installers are certified, trained and specialized in Zephyr systems.
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Fast after-sales service : you have priority in case of technical needs.
We recently installed this model in Sainte-Julie for an intergenerational home with two ZE18CB25I indoor units. The result? Stable performance at -22°C with operation so quiet that customers had to check that the unit was actually turned on.
Important technical data
| Specification | Value |
|---|---|
| Cooling Capacity | 36,000 BTU |
| Refrigerant | R-454B |
| Compressor (Outdoor Model) | ZE-536M425 |
| ENERGY STAR® Certified | Yes, including Cold Climate |
| Tension | 220V |
| Dimensions (L x W x H) | 37.4 x 41.34 x 13.39 in |
| LogisVert Grant | Up to $2,712 (updated May 2025) |
Why choose AirGreen for your Zephyr dual-zone heat pump?
We don't just sell heat pumps: we install them, test them, maintain them , and most importantly, we live with them every day. As a deeply rooted HVAC company in Montreal , our expertise is directly linked to the reality of our customers.
What you get with AirGreen:
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A human, local and personalized service .
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Honest and transparent advice on the correct sizing of your installation.
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Complete support , including subsidies, permits, and administrative procedures.
We've built our reputation on trust , quality work , and technical rigor . The Zephyr 36,000 BTU is one of the products we recommend most enthusiastically because it embodies everything we look for in a sustainable heating and cooling solution.
Conclusion
The Zephyr R-454B Dual Zone Heat Pump | 36,000 BTU Compressor isn't just another appliance. It's a concrete answer to a very real need: to live comfortably in all seasons, without noise, without energy waste, and without compromising on quality.
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: 22,600 BTU/h at −8 °C, 36,000 at −15 °C.
How many heads can I connect?
Up to 4 on this outdoor unit. This product is configured for 2 heads.
Can I mix head sizes?
Yes. The “Zones” menu offers 9 combinations, from 9 + 9 to 18 + 24 (in thousands of BTU). Each head is sized for its room.
How much is the LogisVert grant?
$2,712 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 3893671. It also meets the ENERGY STAR Most Efficient criteria, according to the ENERGY STAR database.
Down to what temperature does it heat?
Down to −25 °C.
Is it noisy?
Outdoors, 59 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.