Zephyr R-454B Dual Zone Heat Pump | 24,000 BTU Compressor | Montreal, Laval, Longueuil, South Shore & North Shore
The Zephyr Hi Multi Xtreme R454B 24 000 multi-zone heat pump heats and cools 2 rooms with a single outdoor unit. it delivers 17,600 BTU/h at −8 °C, heats down to −25 °C and qualifies for a $2,112 LogisVert grant. Installed by AirGreen in Montréal, Laval, Longueuil, the North Shore and the South Shore.
2 rooms, one outdoor unit.
Compared with the 59 multi-zone systems of 24,000 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 12,870 to 29,100 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 112 % 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 59 multi-zone systems of 24,000 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.
Quiet, efficient and designed for the Quebec climate: The Zephyr multi-zone solution approved by AirGreen
At AirGreen, we know that residential comfort needs in Montreal, Laval, Longueuil, and the North and South Shores are as varied as the seasons themselves. That's why we decided to focus on the DoubleZone Zephyr R-454B heat pump , a model that ticks all the boxes: energy efficiency, reliability in cold climates, flexible two-zone installation, and most importantly, minimal noise. This 24,000 BTU unit is much more than just a heating and cooling unit—it's a strategic choice for demanding Quebec families.
Designed for the Canadian climate, optimized by AirGreen
The Zephyr DoubleZone R-454B isn't a generic product. It's designed to our exacting specifications and meets Canadian quality standards . It combines the performance of a 24,000 BTU compressor with the flexibility of a dual-zone installation—ideal for homes, condos, or apartments where room-to-room needs vary.
Energy efficiency that translates into concrete savings
With a SEER2 of 23.0 , an HSPF2 of 10.0 and an EER2 of 12.85 , this heat pump is among the best in its class in terms of efficiency. It is ENERGY STAR® certified, including for cold climates , and operates efficiently down to -25°C , allowing it to completely replace a traditional heating system . It is a choice that not only allows you to reduce your electricity bill , but also to benefit from significant subsidies , including Hydro-Québec's LogisVert program, which grants $2,112 for this model (updated May 1, 2025).
Two zones, one unit, total control
Tailor-made configurations for personalized comfort
The Zephyr 24,000 BTU adapts to your specific needs. It can be configured in:
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9,000 + 9,000 BTU
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9,000 + 12,000 BTU
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9,000 + 18,000 BTU
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12,000 + 12,000 BTU
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12,000 + 18,000 BTU
This allows independent management of two thermal zones in your home, which optimizes both comfort and energy savings. Whether for a bedroom and a living room , or two different floors , each room gets the ideal temperature at the right time.
Compact dimensions, robust compressor
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Outdoor Unit Dimensions : 37.4 x 33.07 x 13.39 in
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Outdoor model : ZE-527M325
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Compatible indoor unit models : ZE09CB25I, ZE12CB25I, ZE18CB25I
The outdoor unit remains discreet despite its power, and its noise level of only 59 dB(A) ensures quiet operation, perfectly suited to residential environments.
An installation by AirGreen: expertise, transparency and trust
Concrete example: Residential installation in Longueuil
In the spring of 2025, our team installed a Zephyr DoubleZone 24,000 BTU in an intergenerational home in Longueuil , with a 12,000 + 12,000 BTU configuration. The main living room and the basement bedroom had very different needs: lots of glazing on the main floor, and very little insulation in the basement. Result? A custom solution, a client eligible for the $2,112 grant , and a 40% reduction on their annual heating bill . All with a zero initial deposit , as per our policy.
Installation on the North Shore: discretion and comfort
Another installation in Blainville demonstrated the versatility of this system. The client was looking for a quiet heat pump for their single-story home. Thanks to our rapid response, the unit was installed in one day, without drilling into any supporting structure. The system's virtually inaudible appearance, both indoors and outdoors, won over the entire family.
Why choose the Zephyr DoubleZone R-454B?
Cutting-edge, environmentally friendly technology
R-454B refrigerant is not only more environmentally friendly than R-410A, but it also performs better in extreme temperatures . This makes the Zephyr a sustainable , efficient , and future-proof solution, in compliance with new environmental standards.
A reassuring guarantee
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Compressor : 10 years
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Parts : 10 years
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Labor : Optional with 10-10-10 Extended Warranty
By choosing AirGreen, you also have access to extended warranties through our partners, including Prime Assurance , for total peace of mind .
AirGreen: Your Trusted HVAC Partner
Our unique approach
At AirGreen, we believe that every installation should be transparent , tailored , and without surprises . That's why:
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Our quotes are free and made on site , after a complete assessment.
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No advance payment is required : you only pay when you are satisfied.
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Our technicians are all certified and experienced , ensuring fast and faultless installations.
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Our prices are transparent and our clients see this with every project.
Contact us today
Are you located in Montreal, Laval, Longueuil, on the South Shore or the North Shore and looking for an efficient, quiet, and reliable dual-zone solution? The Zephyr DoubleZone R-454B heat pump is the answer.
Call us at (514) 316-2973 or email us at sales@airgreen.ca to get your free estimate , schedule a visit to our Boucherville showroom , or chat with an expert.
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: 17,600 BTU/h at −8 °C, 27,000 at −15 °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 5 combinations, from 9 + 9 to 12 + 18 (in thousands of BTU). Each head is sized for its room.
How much is the LogisVert grant?
$2,112 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 3893666. 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.