Zephyr R-454B Dual Zone Heat Pump | 18,000 BTU Compressor | Montreal, Laval, Longueuil, South Shore & North Shore
The Zephyr Hi Multi Xtreme R454B 18 000 multi-zone heat pump heats and cools 2 rooms with a single outdoor unit. it delivers 11,500 BTU/h at −8 °C, heats down to −25 °C and qualifies for a $1,380 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 2 heads and modulates from 13,900 to 18,300 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 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
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
At AirGreen, we know that the comfort of a Quebec home depends on efficient, quiet and reliable HVAC solutions, no matter the season. It is precisely with this in mind that we have chosen to integrate the Zephyr R-454B DoubleZone Heat Pump | 18,000 BTU Compressor into our catalog. This multi-zone unit, designed according to our strict technical requirements and respecting Canadian quality standards , perfectly meets the needs of residences located in Montreal, Laval, Longueuil , as well as on the North Shore and the South Shore .
A system designed for Quebec climates
The Zephyr DoubleZone 18,000 BTU is a concentrate of innovation adapted to the harsh winters and hot summers of Quebec. Thanks to its high-performance compressor operating down to -25°C , it offers stable heating, even during the worst cold spells on the North Shore or in Longueuil.
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Heating capacity : -25°C without loss of efficiency
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Cooling capacity : 18,000 BTU
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Ecological refrigerant : R-454B , less polluting and compliant with modern environmental standards
Silence and discretion at the heart of performance
One of the biggest advantages of this Zephyr heat pump is its ultra-quiet operation . Its outdoor unit generates a noise level of only 55 dB(A) , making it one of the quietest machines on the market for a dual-zone configuration. Whether you live in a condo in downtown Montreal or a single-family home in Boucherville, peace and quiet are guaranteed.
A smart dual zone for personalized comfort
Thanks to its dual-zone system , the Zephyr can power two separate rooms with a single outdoor unit. Whether you want to air condition a bedroom and a living room, or an office and a basement, this model offers you an economical, efficient and aesthetic solution.
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Available configurations : 9+9 or 9+12 (BTU per indoor unit)
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Compatible indoor models : ZE09CB25I and ZE12CB25I
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Maximum number of zones : 2
An installation signed AirGreen: quality assurance
At AirGreen, we have already installed this Zephyr DoubleZone 18,000 BTU in several residences in Laval, Saint-Bruno, Terrebonne, Brossard and Rosemère . The feedback is unanimous: silence, efficiency, energy savings .
A concrete example: in Candiac , a retired couple was looking for a solution to maintain a stable temperature between their upstairs bedroom and the living room. We recommended this 9+9 configuration, which was installed in a single day. The result: a 27% reduction in energy bills and increased comfort, both summer and winter.
Exceptional energy efficiency
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SEER2 : 22.0
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HSPF2 : 10.0
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EER2 : 13.3
These coefficients demonstrate that this system is not only efficient, it is also extremely energy-efficient . This makes it an excellent solution for all homeowners in Montreal and its surrounding areas who are concerned about reducing their ecological footprint while maximizing their comfort.
A $1,380 LogisVert grant not to be missed
The Zephyr DoubleZone 18,000 BTU is eligible for the provincial LogisVert grant , which allows you to obtain up to $1,380 in financial assistance . AirGreen takes care of everything: eligibility verification, application submission, technical documentation, etc.
Guarantee and peace of mind
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Compressor : 10 years
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Parts : 10 years
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Labor : 0 years (optional with 10-10-10 extended warranty available)
At AirGreen, we highly recommend this extended warranty , especially if you want complete peace of mind, especially for installations on the South Shore where temperature variations can put additional strain on equipment.
A robust, compact and elegant machine
With exterior dimensions of 33.86 x 26.38 x 12.21 inches , the unit is easy to hide on a balcony or at the back of the house. Its modern design blends well with the typical residential architecture of Longueuil, Laval or Boucherville .
Connectivity and smart control
Although the WiFi option is optional , it allows users to control their units remotely via an intuitive app. A definite plus for owners who travel frequently or want to manage their comfort remotely.
Why choose AirGreen?
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Free on-site estimate , no obligation
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No advance payment required : you only pay when everything is finished and to your satisfaction
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Certified installers , with concrete and local HVAC experience
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Fast and efficient after-sales service , with technicians who know your products inside out
An installation without compromise, according to our standards
This Zephyr model has been selected, tested and validated by our experts according to our own quality criteria , well above those imposed by industry standards. The result: a reliable product, designed to last, which fits perfectly into our mission to offer the best HVAC solutions in Montreal, Laval and the entire metropolitan area .
Conclusion
The Zephyr R-454B 18,000 BTU Dual Zone Heat Pump is a smart choice for those who want performance, quietness, and environmental compliance without compromise. With its simplified installation, reliable performance down to -25°C, and dual zone capability, it's ideal for homes of all sizes in Greater Montreal.
Contact AirGreen today for a free quote or to schedule installation. We're here to make your comfort a priority, whatever the season.
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: 11,500 BTU/h at −8 °C, 18,000 at −15 °C.
How many heads can I connect?
Up to 2 on this outdoor unit. This product is configured for 2 heads.
Can I mix head sizes?
Yes. The “Zones” menu offers 2 combinations, from 9 + 9 to 9 + 12 (in thousands of BTU). Each head is sized for its room.
How much is the LogisVert grant?
$1,380 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 3893663. 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, 55 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.