Zephyr R-454B Dual Zone Heat Pump | 42,000 BTU Compressor | Montreal, Laval, Longueuil, South Shore & North Shore
The Zephyr Hi Multi Xtreme R454B 42 000 multi-zone heat pump heats and cools 2 rooms with a single outdoor unit. it delivers 28,200 BTU/h at −8 °C, heats down to −25 °C and qualifies for a $3,384 LogisVert grant. Installed by AirGreen in Montréal, Laval, Longueuil, the North Shore and the South Shore.
2 rooms, one outdoor unit.
Compared with the 86 multi-zone systems of 42,000 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 5 heads and modulates from 16,000 to 35,650 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 85 % 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 86 multi-zone systems of 42,000 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 Zephyr R-454B 42,000 BTU DoubleZone Heat Pump
A multi-zone system designed according to our standards, respecting Canadian quality standards
At AirGreen, we know that every home has its own unique challenges when it comes to thermal comfort. That's why we've chosen to include the Zephyr R-454B DoubleZone Heat Pump | 42,000 BTU Compressor in our offering, a powerful, quiet, and energy-efficient multi-zone solution that's ideal for homes in Montreal, Laval, Longueuil, the South Shore, and the North Shore.
This system was custom-designed to meet our exacting requirements : it meets the rigorous standards of the Canadian climate while ensuring installation flexibility and maximum comfort for two separate zones of your home. In this article, we provide a detailed overview of this innovative heat pump, its technical specifications, its tangible benefits, and our direct field experience.
Designed for thermal comfort in extreme climates
Heating down to -25°C , ultra-quiet operation, high energy efficiency, the Zephyr R-454B DoubleZone is designed for the Quebec climate . Thanks to its 42,000 BTU compressor , it ensures constant performance, even in extreme cold or heat.
This heat pump uses the new R-454B refrigerant , which is much more environmentally friendly than older gases like R-410A, while maintaining high energy efficiency:
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SEER2: 22.0
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HSPF2: 9.5
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EER2: 12.0
These indicators demonstrate reduced consumption, allowing families in Montreal and the surrounding area to make substantial energy savings , summer and winter.
A dual-zone installation for personalized comfort
With the possibility of installing two separate indoor units (among the ZE09CB25I, ZE12CB25I, ZE18CB25I or ZE24CB25I models), this heat pump allows you to:
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Independently heat or cool two rooms or two floors.
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Adjust the temperature according to the use of each zone.
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Reduce costs by only heating spaces actually used.
Real-life installation examples : We recently installed a 42,000 BTU Zephyr with an 18,000 + 24,000 BTU configuration in a Boucherville home, where the clients wanted to separately manage the master bedroom and main floor living room. The result: optimal comfort without having to unnecessarily overheat the entire space.
Zephyr 42,000 BTU Technical Data
| Characteristic | Value |
|---|---|
| Heating capacity | Up to -25°C |
| Cooling capacity | 42,000 BTU |
| Refrigerant | R-454B , low environmental impact |
| ENERGY STAR® Certification | Yes , including in cold climates |
| Noise level (outdoor unit) | 63.0 dB(A) — extremely quiet |
| Dimensions (L x W x H) | 37.4 x 41.34 x 13.39 inches |
| Voltage | 220V |
| Standard warranty | 10 years on the compressor, 10 years on parts |
| Extended warranty (optional) | 10-10-10 (including labor) |
An energy-efficient and subsidized device
Good news for Quebec residents: this heat pump is eligible for the LogisVert grant , with an applicable amount of $3,384 (updated May 1, 2025). At AirGreen, we support you for:
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Fill out government forms
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Get your grant faster
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Maximize your savings with current programs
Why choose AirGreen for the installation of your Zephyr heat pump?
AirGreen is not just a reseller . We test and select the models we offer ourselves. The Zephyr R-454B was chosen specifically for its compatibility with Canadian standards , its reliability and its performance in real conditions.
Our benefits include:
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Free on-site estimate throughout Greater Montreal
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Clear and transparent prices , no hidden costs
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Certified technicians , experts in multi-zone and inverter systems
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No deposit required : pay only once the work is completed and validated
Real testimonial: Mr. Charbonneau, from Laval, entrusted us with his renovation project. He wanted to install a high-performance system for his new home office and finished basement. We suggested a Zephyr 12,000 + 30,000 BTU. After three months of use: " Quiet, stable, no temperature fluctuations. My office is comfortable even at -20°C outside. "
Designed according to our quality standards
We have worked hand in hand with our suppliers to ensure that this heat pump meets all Canadian safety and efficiency standards , while meeting the specific requirements of our customers . It offers:
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Consistent performance over the long term
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Excellent value for money
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High modularity to meet different residential needs
Expansion options and modularity
The model shown is for 2 zones , but can be scalable up to 5 zones , ideal for those considering future expansion of their HVAC system. It is a lasting investment that adapts to your home and lifestyle.
Maintenance, durability and after-sales service
At AirGreen, we also offer comprehensive maintenance contracts to ensure the longevity of your equipment:
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Annual inspection
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Cleaning filters and units
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Refrigerant Check
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Preventive adjustments before winter or summer
Thanks to our network of local technicians in Montreal, Laval, Longueuil, on the North Shore and the South Shore , we are always available to assist you.
Conclusion: A solution without compromise
The Zephyr R-454B DoubleZone Heat Pump | 42,000 BTU Compressor represents the perfect balance between performance, comfort and energy efficiency . At AirGreen, we selected it for its robustness, its compatibility with Quebec's climate and its installation flexibility.
Call us today for a free, personalized estimate. Whether you're in Montreal, Laval, Longueuil, the South Shore, or the North Shore, our experts are ready to advise you and ensure your installation meets your expectations.
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: 28,200 BTU/h at −8 °C, 36,000 at −15 °C.
How many heads can I connect?
Up to 5 on this outdoor unit. This product is configured for 2 heads.
Can I mix head sizes?
Yes. The “Zones” menu offers 10 combinations, from 9 + 9 to 24 + 24 (in thousands of BTU). Each head is sized for its room.
How much is the LogisVert grant?
$3,384 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 3893668. 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, 63 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.