Zephyr R-454B 5-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 5 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.
5 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.
A high-performance multi-zone solution for absolute comfort
Zephyr R-454B 5-Zone Heat Pump | 42,000 BTU Compressor | Montreal, Laval, Longueuil, South Shore & North Shore
Created according to our requirements, silent and efficient, without compromise
At AirGreen, we know that multi-zone climate comfort is not a luxury, but a necessity for many homes and businesses in Greater Montreal. That's why we are proud to offer the Zephyr R-454B 5-Zone Heat Pump | 42,000 BTU Compressor , a unit designed to our exacting standards and in full compliance with Canadian quality standards .
With its ability to power up to five separate zones , its extremely quiet operation and its ENERGY STAR® certified energy efficiency , this system is ideal for complex homes or multi-story buildings in regions as diverse as Montreal, Laval, Longueuil, the North Shore and the South Shore .
Thermal performance tailored for our climate
The Zephyr 5-Zone heat pump features a high-power 42,000 BTU compressor and a new generation R-454B refrigerant , which is much more environmentally friendly. This fluid not only helps reduce the system's carbon footprint, but also improves its overall efficiency.
-
SEER2: 22.0 (seasonal cooling efficiency)
-
HSPF2: 9.5 (seasonal heating efficiency)
-
Minimum heating temperature: -25°C
-
ENERGY STAR® Certified for Cold Climates
This data guarantees year-round comfort, even during the harshest winters in Quebec .
A 100% customizable installation
This heat pump accepts up to five compatible indoor heads:
-
ZE09CB25I
-
ZE12CB25I
-
ZE18CB25I
-
ZE24CB25I
This allows exceptional flexibility in configuring your system, whether for a bungalow, a multi-story house or a duplex. Each zone is independently controllable , giving you precise control over energy consumption and room temperature.
Silence as a signature
The exterior noise level is measured at 63.0 dB(A) , which is exceptionally low for a unit of this capacity. This means you enjoy thermal comfort without any intrusive mechanical noise, whether for your family or your neighbors.
Manufacturing according to our standards, for our realities
AirGreen contributed to the technical design of this unit so that it meets the climatic and structural requirements of Quebec :
-
Anti-corrosion design for Montreal urban environments
-
Robust materials against frost and constant humidity
-
Easily accessible filters for quick HVAC maintenance
An example of a real installation: a two-generation house in Boucherville
We recently installed this model in a two-generational home in Boucherville . Each floor was equipped with an independent head (ZE12CB25I on the ground floor, ZE09CB25I upstairs, and ZE18CB25I in the basement). The client appreciates the independent management of each space , and the savings are already being felt on the electricity bills.
AirGreen Warranty, Maintenance and Services
This heat pump includes a standard 10-year warranty on parts and compressor (labor not included), with the option to extend to 10-10-10 years .
At AirGreen, we provide complete HVAC maintenance , with scheduled visits, annual cleanings, and proactive monitoring.
We also guarantee:
-
Free on-site estimate
-
Zero deposit to pay: you only pay once the work is completed and validated
-
Certified and RBQ-registered technicians
LogisVert Grant: up to $3,384 in returns
The Zephyr 5-Zone heat pump is eligible for Hydro-Québec's LogisVert program , with reimbursement of up to $3,384 (updated May 2025).
This program makes this solution even more affordable for environmentally and wallet-conscious homeowners.
Why choose AirGreen for your HVAC project?
-
More than 1000 successful installations on the South Shore and North Shore
-
Concrete expertise in the sizing of multi-zone projects
-
Fast response time and human service
-
Post-installation follow-up included at no cost
We don't just sell a product: we deliver an experience of comfort, performance, and peace of mind.
Would you like to receive a free quote or estimate at home for this Zephyr multi-zone heat pump?
Contact AirGreen today at (514) 316-2973 or by email at sales@airgreen.ca . Our HVAC experts travel throughout Montreal, Laval, Longueuil, the South Shore, and the North Shore.
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 5 heads.
Can I mix head sizes?
Yes. The “Zones” menu offers 2 combinations, from 9+9+9+9+9 to 9+9+9+9+12 (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.