Ameristar TripleZone Wall Heat Pump | 24,000 BTU Compressor | Installation in Montreal, Laval, Longueuil, South Shore & North Shore

In stock
SKU: M4THM1924A13N-999
24,000BTU/h · 3 heads
−30 °Cheats down to
$2,832LogisVert, indicative
ENERGY STAR® cold climateENERGY STAR Most EfficientOptional Wi-FiR-410AUp to 3 heads
Areas
Talk to a technician · 514 316-2973
Outdoor unit M4THM1924A13NPossible indoor models M4MHW2309A1N0, M4MHW2312A1N0, M4MHW2318A1N0AHRI 210488260· ENERGY STAR 2415482
In short

The Ameristar 24 000 multi-zone heat pump heats and cools 3 rooms with a single outdoor unit. it delivers 23,600 BTU/h at −8 °C, heats down to −30 °C and qualifies for a $2,832 LogisVert grant. Installed by AirGreen in Montréal, Laval, Longueuil, the North Shore and the South Shore.

01 · The verdict in 10 seconds

3 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.

ENERGY STAR Most EfficientNEEP 65384AHRI 210488260LogisVert · October 1, 2026
+23,600 BTU/h at −8 °CRank 5 (tied) of 57. Class median: 17,400 BTU/h.
+$2,832 LogisVert grantRank 5 (tied) of 45. Class median: $2,088.
+Heats down to −30 °CRank 7 (tied) of 59. Class median: −25 °C.
!Good to know: SEER2 19.0Rank 52 of 59; class median: 21.0.
23,600BTU/h certified at −8 °C
−30 °Cstill heating
3heads
2.33COP at −8 °C
$2,832LogisVert, indicative
02 · The machine

The parts that make a multi-zone system.

Tap a part to learn more.

M4THM1924A13N

Outdoor unit

One compressor for the whole house. It supplies up to 3 heads and modulates from 7,500 to 26,600 BTU/h depending on what the rooms call for (NEEP).

03 · How it works

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.

04 · My plan

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.

05 · The series

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.

Outdoor2 zones3 zones4 zones5 zones
18,000BTU
2
24,000BTU
2Here
30,000BTU
234
36,000BTU
234
42,000BTU
2345

Ameristar 24 000 · 3 zones

23,600 BTU/h
at −8 °C
$2,832
LogisVert

Up to 3 heads on this outdoor unit. Tap another box to see that size.

06 · Deep cold

At −15 °C, it still delivers 90 % 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.

+8.3 °C
7,500 → 31,400 BTU/h
-8 °C
8,200 → 26,600 BTU/h
-15 °C
8,200 → 21,600 BTU/h
Source: NEEP, minimum, rated and maximum ratings at 47, 17 and 5 °F.
07 · The bill

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.

08 · Efficiency

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.

SEER2 · seasonal cooling19.0
Scale 1 – 30Median: 21
Rank 52 (tied) of 59 in its class.
HSPF2 · seasonal heating10.0
Scale 1 – 15Median: 10
Rank 20 (tied) of 59 in its class.
EER2 · cooling in peak heat12.5
Scale 1 – 20Median: 12.5
Rank 26 (tied) of 57 in its class.
COP at −15 °C2.1
Scale 0 – 4Median: 2
Rank 11 (tied) of 51 in its class.
ENERGY STAR Most EfficientCold climate · ID 2415482 · ENERGY STAR database
09 · LogisVert grant

A grant you can calculate, not guess.

23,600 BTU/h÷ 1,000 ×$120=$2,832

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).

Set for this system (AHRI 210488260). Another head combination (ducted, console) can change the AHRI number, and so the amount.
Cap: the grant never exceeds 100 % of the purchase and installation cost before taxes.
9 months after installation to apply; +5 % when two measures are in the same request.
All about LogisVert, with the simulator
10 · Report card

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.

11 · Head-to-head

Against three other brands in its class.

Same rated size, other manufacturers. Pick the opponent.

12 · Multi-zone or wall units

One multi-zone or several wall units? Both sides, honestly.

This multi-zone3 wall units
On the wall1 outdoor unit3 outdoor units
Electrical1 dedicated circuitOne circuit per unit
CapacityShared between roomsReserved for each room
If the outdoor unit stopsEvery zone stopsOnly one room
ModesSame mode everywhereEach room chooses
LogisVert$2,832 for the systemDepends on each model

We compare both options on your floor plan during the estimate.

13 · Installation

What to know before installing a multi-zone system.

Dimensions, wiring and lines, drawn. Then our six steps.

The outdoor unit, dimensioned

26 in
M4THM1924A13NDepth 25.8 in
38 in
Dimensions: product sheet (W × D × H).

One circuit for the whole house

Electrical panel
Load calculation before the quote
30 A max. breaker
MCA 25 A · 220 V
Outdoor unit
Head 1
Head 2
Head 3
Our RBQ licence covers electrical work (subclass 16).
01Room-by-room visit and surveyWe measure each zone and note insulation and windows. The on-site estimate is free.
02Heads and line layoutOne pair of lines per head.
03Outdoor unit baseAbove the snow line, away from the neighbours’ bedroom windows.
04Exposed, finished linesLines 1/4 - 3/8 in under line covers, no work inside the walls.
05Dedicated circuit220 V, MCA 25 A, 30 A protection. The panel load calculation is done before the quote.
06Commissioning, zone by zoneEach head is tested and the controls set up. Then the LogisVert application within 9 months.
14 · Sound

Published sound levels, on one scale.

We use the outdoor figure to choose where the unit goes.

29
48
58
27
58
20 dB(A)3040506070
29 Reference head, lowest speed48 Reference head, highest speed27 Class indoor median58 Outdoor unit58 Class outdoor median
Values in dB(A). Indoor values are those of the sheet’s reference head; each head has its own, confirmed for the chosen model. Municipal noise by-laws vary by borough.
15 · What sets it apart

What is particular about this machine.

Only facts published by ENERGY STAR, NEEP or the manufacturer.

Most EfficientENERGY STARAmong the year’s most efficient according to ENERGY STAR, on top of its cold-climate certification.
26,600BTU/h peak at −8 °CIts maximum capacity certified by NEEP, above its rated value.
7,500BTU/h at low speedMinimum certified capacity (NEEP): it slows down instead of stopping when a single room calls.
−30 °CColdest certified pointNEEP still lists 17,220 BTU/h at a COP of 1.50 at −22 °F.
96 WBase pan heaterHeater in the outdoor unit’s base pan, against ice (NEEP).
16 · Specifications

Every number, and where it comes from.

Each line carries its source; a line with no published value is not shown.

Performance
Cooling capacity (size)24,000 BTU · 2 tonsSheet
Certified cooling at 35 °C23,200 BTU/hNEEP
SEER2 (seasonal cooling efficiency)19.0AHRI
EER2 (instant cooling efficiency)12.5AHRI
HSPF2 (seasonal heating efficiency, region IV)10.0AHRI
HSPF2, region V (coldest)7.8NEEP
Dehumidification3.0 pints/hSheet
Heating
Capacity at +8.3 °C24,000 BTU/h · COP 3.91NEEP
Capacity at −8 °C23,600 BTU/h · COP 2.33NEEP
Capacity at −15 °C21,600 BTU/h · COP 2.1NEEP
Capacity at -30 °C (max.)17,220 BTU/h · COP 1.5Sheet
Modulation range7,500 – 26,600 BTU/hNEEP
Heats down to−30 °CSheet
Zones and heads
Zones on this product3 Zones (Triple Zone)Sheet
Maximum zones3 Zones (Triple Zone)Sheet
Possible indoor modelsM4MHW2309A1N0, M4MHW2312A1N0, M4MHW2318A1N0Sheet
Combinations offered5 · 9+9+9 … 12 + 12 + 12Sheet
Indoor dimensions (W × D × H)32.48 × 7.72 × 11.53 inSheet
Vertical louversManualSheet
Horizontal louversAutoSheet
Airflow (reference head)400 CFMSheet
Indoor sound (reference head)29 – 48 dB(A)Sheet
Installation
Outdoor unit (W × D × H)38 x 25.8 x 26 inSheet
Line sizes1/4 - 3/8 inSheet
Outdoor sound58 dB(A)Sheet
Base pan heater96 WNEEP
Electrical
Voltage220 VSheet
MCA (minimum circuit ampacity)25 ASheet
MOP (maximum overcurrent protection)30 ASheet
RefrigerantR-410ASheet
Wi-FiOptionalSheet
Certifications and warranty
AHRI210488260AHRI
ENERGY STARYes · cold climate · ID 2415482ENERGY STAR
ENERGY STAR Most EfficientYesENERGY STAR
LogisVert grant (indicative)$2,832LogisVert
Warranty (compressor · parts · labour)10 yrs · 10 yrs · 0 yrsSheet
AirGreen extended warrantyPossibleSheet
17 · Official brochures

The manufacturer’s documentation, as PDF.

18 · Description

Everything we have written about this system.

Ameristar Wall-Mounted Triple Zone Heat Pump

Optimal Comfort in Every Season

In the vast world of heating and air conditioning systems, AirGreen stands out for its expertise and commitment to quality. Located in the heart of Montreal, our company also shines in Laval, Longueuil, as well as on the North Shore and South Shore, offering HVAC (Heating, Ventilation, and Air Conditioning) solutions tailored to the specific needs of each household. Among our flagship products, the Ameristar Wall-Mounted Triple Zone Heat Pump stands out for its advanced technology and energy efficiency, ensuring unmatched comfort throughout the year.

Exceptional Features

The Ameristar Wall-Mounted Triple Zone Heat Pump is designed to meet the highest demands in residential heating and cooling. Equipped with a 24,000 BTU compressor and capable of efficiently heating up to -30°C, it represents the ideal solution for Quebec's harsh climates. Here are some of its remarkable features:

  • Powerful cooling and heating capacity: With a 24,000 BTU capacity, this system ensures precise temperature control in three distinct zones, thus offering personalized flexibility and comfort.
  • Advanced technology: The variable-speed compressor adjusts its power based on needs, optimizing energy consumption and comfort.
  • Superior energy performance: Certified Energy Star and with a 21.0 SEER efficiency, this heat pump guarantees exceptional energy efficiency, reducing operating costs.
  • Durability and reliability: With a coil coating specially designed for coastal regions and a 10-year warranty on all parts, this system is built to last.
  • Intelligent control: The optional WiFi functionality allows for easy management of your home's temperature, even remotely.

Benefits for Residents of Montreal and Surrounding Areas

Installing an Ameristar Wall-Mounted Triple Zone Heat Pump by AirGreen brings numerous benefits to the inhabitants of Montreal, Laval, Longueuil, and the surrounding regions:

  • Significant savings: Thanks to federal and provincial subsidies, coupled with the high energy efficiency of the heat pump, residents can achieve significant savings on their energy bills.
  • Customized comfort: The ability to heat or cool three zones independently allows for an environment perfectly tailored to individual preferences, without wasting energy.
  • Professional installation: Our team of certified experts ensures a quick and standards-compliant installation, guaranteeing the optimal operation of your system.
  • Support and after-sales service: AirGreen is committed to providing comprehensive support and responsive after-sales service, ensuring total customer satisfaction.

Why Choose AirGreen?

At AirGreen, our priority is our customers' satisfaction. We understand the importance of a comfortable and energy-efficient home, especially in the face of Quebec's climatic challenges. By choosing the Ameristar Wall-Mounted Triple Zone Heat Pump, you're not just opting for a state-of-the-art heating and cooling solution, but also for the expertise, professionalism, and dedication of AirGreen. We're proud to offer high-quality products, accompanied by exceptional customer service, to transform your home into a haven of peace, summer and winter alike.

Conclusion

The Ameristar Wall-Mounted Triple Zone Heat Pump represents the pinnacle of comfort, energy efficiency, and flexibility. With AirGreen, you benefit from unparalleled expertise in the installation and maintenance of HVAC systems in Montreal, Laval, Longueuil, and the surrounding areas. Don't wait any longer to enhance the comfort of your home and achieve substantial savings on your energy bills. Contact us today to learn more about our services and product range.

19 · Questions

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: 23,600 BTU/h at −8 °C, 21,600 at −15 °C.

How many heads can I connect?

Up to 3 on this outdoor unit. This product is configured for 3 heads.

Can I mix head sizes?

Yes. The “Zones” menu offers 5 combinations, from 9+9+9 to 12 + 12 + 12 (in thousands of BTU). Each head is sized for its room.

How much is the LogisVert grant?

$2,832 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 2415482. 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, 58 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.

AirGreen

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.

RBQ 5645-9605-01Ventilation 15.8, refrigeration 15.10, electrical 16
We handle the circuitOur licence covers the electrical work
LogisVert : $2,832AHRI 210488260 checked against the list of October 1, 2026
Beware of scamsHydro-Québec does no phone or door-to-door solicitation for LogisVert
Sources checked on October 1, 2026.NEEP, Cold Climate Air Source Heat Pump List, product 65384 (AHRI 210488260): capacities and COP, modulation, SEER2, EER2, HSPF2.ENERGY STAR certified heat pump database, ID 2415482.Hydro-Québec, LogisVert eligible heat pump list (owner, existing home), file of October 1, 2026; participation guide, version 1.10.Costs: Hydro-Québec Rate D, 11.142 ¢/kWh (second tier, since 1 April 2026). Amounts shown are estimates; only the responsible bodies confirm the grant awarded.