Ameristar DoubleZone Wall Heat Pump | 18,000 BTU Compressor | Installation in Montreal, Laval, Longueuil, South Shore & North Shore
The Ameristar 18 000 multi-zone heat pump heats and cools 2 rooms with a single outdoor unit. it delivers 15,000 BTU/h at −8 °C, heats down to −30 °C and qualifies for a $1,800 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 7,000 to 16,400 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 75 % 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
One circuit for the whole house
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.
The manufacturer’s documentation, as PDF.
Everything we have written about this system.
Ameristar DoubleZone Wall-Mounted Heat Pump
The Ultimate Comfort Solution for Montreal and Surrounding Areas
Introduction to the Double Zone Heat Pump
In the world of heating, ventilation, and air conditioning (HVAC), the quest for efficient and energy-saving solutions never ends. AirGreen, a leader in the HVAC field in Montreal, Laval, Longueuil, as well as the North Shore and South Shore, is proud to introduce the Ameristar DoubleZone Wall-Mounted Heat Pump, a technological gem designed to provide unparalleled comfort throughout the year.
Advanced Technical Features
The Ameristar DoubleZone Wall-Mounted Heat Pump stands out for its exceptional performance, with a cooling capacity of 18,000 BTU and a heating capability down to -30°C. Designed for spaces with up to two distinct zones, this heat pump offers unprecedented flexibility, allowing for optimal temperatures in different rooms simultaneously.
Dimensions and Installation: The external dimensions of the unit (model M4THM1918A12N) are suitable for any type of home. Installation by our expert technicians ensures perfect integration into your home or workplace in Montreal, Laval, Longueuil, as well as the North Shore and South Shore.
Subsidies and Energy Efficiency: With an efficiency rating of 21.0 SEER, the DoubleZone Ameristar Heat Pump is not only energy-efficient but also eligible for federal and provincial subsidies, significantly reducing the initial cost of investment.
Connectivity and Comfort: Optionally equipped with WiFi, this heat pump allows for remote control via smartphone, offering precise and easy temperature management. Add to this the environmentally friendly R-410A gas, and you have a complete and modern HVAC solution.
Unique Advantages of the DoubleZone Heat Pump
- Effective Heating Down to -30°C: This exceptional capability ensures constant thermal comfort, even in the harsh Canadian winters.
- Variable Speed Compressor: Adaptability and energy efficiency are key, allowing for precise adjustments based on actual heating and cooling needs.
- Coil Coating for Coastal Regions: An additional layer of protection that guarantees the durability and reliability of the unit in all conditions.
- I-Feel Remote Control: For an enhanced user experience, this feature adjusts the temperature based on the perceived temperature in the room, ensuring optimal comfort.
Why Choose AirGreen for Your Installation?
Our expertise and commitment to customer satisfaction position us as the number one choice for your HVAC needs. Choosing AirGreen means opting for professional installation, responsive after-sales service, and tailored advice to maximize the efficiency of your heat pump.
Conclusion
The Ameristar DoubleZone Wall-Mounted Heat Pump represents the pinnacle of thermal comfort and energy efficiency for residents of Montreal, Laval, Longueuil, as well as the North Shore and South Shore. With AirGreen, ensure flawless installation and impeccable service. Embrace the future of HVAC with the DoubleZone Ameristar Heat Pump and experience unprecedented comfort, summer and winter.
Warranty: 10 years on the compressor, 10 years on parts and 6 years on labor, straight from the distributor.
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: 15,000 BTU/h at −8 °C, 13,600 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 3 combinations, from 9 + 9 to 12 + 12 (in thousands of BTU). Each head is sized for its room.
How much is the LogisVert grant?
$1,800 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 2415510. It also meets the ENERGY STAR Most Efficient criteria, according to the ENERGY STAR database.
Down to what temperature does it heat?
Down to −30 °C.
Is it noisy?
Indoors, the reference head goes down to 29 dB(A). Outdoors, 54 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. 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.