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HAXXAIR V2D R-454B Wall-Mounted Air Conditioner/Heat Pump | 24,000 BTU

A 24,000 BTU heat pump designed for Quebec's true climate (and for homes that want consistent comfort)

In Montreal , Laval , Longueuil , on the North Shore and the South Shore , a 24,000 BTU wall-mounted heat pump is rarely an impulse purchase. This size is generally chosen when there is a clear need: a large open-concept space, an upper floor that overheats, a ground floor that is difficult to stabilize, or a building with poor sun exposure and insulation.

At AirGreen, we often see clients who already have a system that works… but doesn't deliver the expected comfort. The problem isn't always the brand: it's the combination of correct sizing, proper location, clean installation, and usage patterns adapted to Quebec's seasons.

The HAXXAIR V2D R-454B | 24,000 BTU is specifically designed for this type of need: a wall-mounted unit capable of providing effective cooling in the summer and maintaining useful heating capacity when temperatures drop. It also utilizes a newer refrigerant ( R-454B , category A2L ) and features a cold-climate-focused design, where defrost and condensate management become a key consideration—not a minor detail.

Key information (24,000 BTU model)

When we prepare a submission or installation plan, here is the data that really matters:

• Cooling capacity: 24,000 BTU

• Heating capacity: down to -25°C

• Rated power: 24,000 BTU

• Power at -8°C: 22,000 BTU

• Power at -15°C: 19,800 BTU

• SEER2: 22.5 (seasonal air conditioning efficiency)

• HSPF2: 9.5 / 7.7 (based on evaluation)

• EER2: 12.5

• COP at -8 °C: 1.85

• Airflow: 1706 CFM (high flow rate, useful for large volumes)

• Wi-Fi: optional

• Refrigerant: R-454B (A2L)

• ENERGY STAR®: Yes + ENERGY STAR® Cold Climate: Yes

• AHRI: 215887342

• ENERGY STAR ID: 3712561

• Model numbers:

  • Interior: HAHZ-24V2D

  • Exterior: HVHZ-24V2D

• Power supply: 220V

  • MCA: 22A

  • MOP: 35A

• Piping: 1/4 – 5/8

• Indoor unit dimensions (W x D x H): 42.5 x 9 x 11 in

• Indoor noise level: 39 / 50 dB(A)

• Outdoor unit dimensions (W x D x H): 35.38 x 13.5 x 29.5 in

• Warranty: 10-10-0 years (compressor – parts – labor)

• Additional warranty: possible

• Provincial subsidy (LogisVert): $2640 (updated: November 26, 2025)

The important point: these figures are not meant to "impress". They are meant to help avoid unpleasant surprises: uneven comfort, a machine that struggles, cycles that are too short, unnecessary noise, or disappointing performance.

Why R-454B is a real issue (and not just a line in a technical datasheet)

The HVAC market is changing, and refrigerants are among the elements that are evolving. R-454B is a newer generation, known for a lower GWP (global warming potential) than some older refrigerants, and no impact on the ozone layer.

For a homeowner, the benefit isn't solely "ecological." It's also a choice that can promote:

• improved compatibility with medium-term market trends,

• a more modern approach to equipment design,

• a service and maintenance management aligned with current practices (tools, procedures, training).

At AirGreen, when we install an R-454B heat pump, we apply strict discipline regarding:

• the quality of the fittings (precise flares, consistent tightening torques),

• vacuum sealing and leak testing,

• the cleanliness of the lines (avoiding moisture and contamination),

• the documentation (useful for the warranty, and for clear traceability of the file).

DC inverter: the concrete impact on temperature stability

We see "Inverter" everywhere. The difference is what it looks like in a real house in Montreal or Laval, with its load variations.

A DC inverter system adjusts its power output instead of operating in on/off mode. In typical everyday use, this provides:

• Fewer temperature fluctuations (more stable comfort),

• Fewer abrupt starts (often quieter),

• finer management during the mid-seasons, when the need is light but constant.

For a large space, this is particularly useful: you want a machine capable of "pushing" when it is very hot, but also capable of stabilizing without over-consuming when the sun goes down or when the house is already close to the set point.

Cold climate: the reality of de-icing and water

Heat pump heating in winter is not just about “it heats up”. Defrost cycles are normal: the outdoor unit must periodically defrost its heat exchanger, and this produces water that must drain properly.

In our service interventions (across all brands), the most frequent winter problems stem from:

• blocked drainage,

• ice accumulation beneath the unit,

• unit too close to the ground

• location exposed to gusts of wind and snowdrifts,

• base or support not suitable.

This unit is designed with ice prevention in mind for the outdoor unit's condensate tray, which helps limit snow/ice buildup during critical periods. Even with good equipment, proper installation makes a huge difference: mounting height, clearance, orientation, runoff management, and distance from snow accumulation zones.

Quietness: what we measure in the field (beyond dB)

The advertised noise level is useful, but the final result depends heavily on the environment:

• Indoor unit : mounting on a lightweight partition can amplify vibrations. A load-bearing wall, good anchoring, and well-isolated cable runs often reduce perceived noise.

• Outdoor unit : a resonating corner between two surfaces, or a bracket placed on a hollow structure, can increase noise. Conversely, careful placement, a suitable bracket, and sufficient clearance result in a significantly more pleasant environment.

This is an aspect that we take seriously at AirGreen, especially in condos (Plateau, Verdun, Griffintown) where noise tolerance is low, and where neighbors are close.

Optional Wi-Fi: useful if used as a management tool, not as a gadget

When used intelligently, Wi-Fi becomes a real advantage. In practice, our customers primarily use it to:

• precondition the house (comfortable temperature before arrival),

• manage the schedules (slightly reduce the night shift, increase the morning shift),

• avoid aggressive "recovery" methods (which consume more fuel and are less comfortable),

• follow the instructions remotely (secondary accommodation, rental, chalet).

And most importantly: Wi-Fi helps to adopt a simple logic that improves comfort and efficiency — keeping a stable temperature rather than switching off completely and restarting at full power.

Dimensions, airflow and diffusion: the trio that changes the experience

On a 24,000 BTU machine, the airflow (1706 CFM) is an advantage, but it must be controlled. Improperly directed airflow can create:

• an unpleasant draft,

• an area that is too cold near the unit,

• an adjacent room that stays warm.

That is why we place great importance on:

• the location (height, distance, orientation),

• adjusting the shutters (vertical/horizontal in auto or parameterized mode),

• actual tests after commissioning (perceived comfort, ventilation speed, distribution in space).

Electricity: the detail that's blocking projects (and how to avoid it)

In residential projects in Montreal and on the South Shore, it regularly happens that a project is technically good… but the electrical panel requires adjustments.

With 220V , MCA 22A and MOP 35A , we must ensure that:

• The wire gauge is correct.

• The protection is adequate (appropriate circuit breaker).

• The electric route is planned properly.

• the panel has the necessary capacity (or an upgrade is planned).

At AirGreen, we anticipate this aspect from the estimation stage, because electricity can be the factor that determines the installation date, the total cost, and sometimes the final choice.

AirGreen Installation: What makes the difference between a good heat pump… and a truly satisfying result

A 24,000 BTU wall-mounted heat pump is often chosen for spaces where mistakes can be costly: large volumes, high ceilings, open layouts, or architectural constraints. A "correct" installation may yield mediocre results. A meticulous installation provides clear, stable, and lasting comfort.

Our AirGreen method (residential and small buildings)

Without making vague promises, here are the steps that explain why some systems seem “exceptional” in one house and only “acceptable” in another:

1) Validation of the actual need (not just “the surface area in square feet”)

We take into account:

• insulation,

• the exposure (south-facing, large windows),

• the floors and staircases,

• the use of the rooms (kitchen, teleworking, bedroom),

• internal heat sources (stove, dryer, equipment, servers/PC).

A heat pump that's too small will struggle to maintain the desired temperature. A heat pump that's too large can reduce the effectiveness of dehumidification in air conditioning, resulting in less comfortable conditions.

2) Choosing the indoor location: the air must “travel”

On the projects in Montreal and Longueuil, we often encounter living room-kitchens that seem simple, but where the air behaves in surprising ways (nooks, load-bearing walls, corridor).

We favor an investment that:

• Avoid blowing directly onto the sofa or table.

• allows air to flow around obstacles.

• promotes natural mixing (and not a local “jet”).

3) Line routing and drainage: the invisible quality

A wall-mounted system also includes:

• clean refrigeration lines,

• properly installed pipe insulation

• a consistent drainage slope,

• a passage that avoids friction points and vibrations.

This is often where the difference lies between a silent system and one that “clicks” or transmits vibrations to the wall.

4) Commissioning and adjustments: the final step that changes everything

Commissioning is not simply a matter of "switching it on". We check:

• behavior in air conditioning and heating systems

• the stability of the setpoint,

• the flow rate and the distribution,

• the response from the external unit,

• comfort settings (ventilation, shutters, modes).

The customer needs to start with a clear usage logic, because a good initial setup avoids unnecessary service calls.

Real-life case 1: Montreal – renovated duplex, very sunny open-concept living space

Context: combined living room and kitchen, large windows, partial heated floors, and a feeling of being in an “oven” in the afternoon in July.
What we do:

• validation of air conditioning needs (sunlight + cooking + occupants),

• Installation of a 24,000 BTU system to absorb peak loads,

• Adjust the diffusion to avoid a direct airflow.

Typical result: more stable comfort, and less aggressive "over-ventilation", because the machine can work at an efficient speed instead of constantly being at the limit.

Real-life case 2: Laval – central staircase, upstairs bedrooms too hot

Context: two-story house, open staircase, heat rising quickly, and insufficient existing air conditioning upstairs.
Common mistake: placing the indoor unit too low or directing the airflow so as to cool the ground floor only.
Our approach:

• strategic positioning to allow air to naturally reach the area that needs it,

• orientation of the shutters and adjustment of the ventilation according to the periods.

Typical result: more habitable floor in summer, and less need for auxiliary heating during the winter.

Real-life case 3: Longueuil – bungalow with basement, discomfort in the shoulder season

Context: customer who completely switches off the machine at night and restarts it in the morning “at full speed”, resulting in discomfort and higher consumption.
Our intervention:

• A simple explanation of inverter logic,

• implementation of a stable setpoint routine,

• recommendation to use Wi-Fi (if installed) to automate schedules.

Typical result: more consistent comfort, reduced power peaks, and fewer complaints related to temperature variations.

Common mistakes to avoid (we see them in service, across all brands)

1. Undersizing : the device runs almost without a break, the house cannot catch up.

2. Oversizing : short cycles, less efficient dehumidification, "humid-cold" sensation in air conditioning.

3. Poor location : air does not circulate in the useful areas.

4. Neglected drainage : water problems, especially during heating and defrosting.

5. Improvised electricity : inadequate choice of circuit breaker, non-compliant wiring, ignored panel constraints.

6. Maintenance neglected : clogged filters, reduced flow rate, decreased efficiency.

With a machine of this category, we want to avoid at all costs the scenario “it works, but it’s not pleasant”.

LogisVert subsidy: how to avoid administrative roadblocks

A displayed subsidy does not automatically guarantee reimbursement: the application must be consistent, complete, and compliant. For a heat pump like this one, typical elements to ensure are properly aligned include:

• the exact interior/exterior models,

• the AHRI reference,

• Proof of installation and the invoice,

• the information requested by the program.

At AirGreen, we structure the file from the start: this reduces delays and avoids data entry errors that force the client to restart part of the process.

10-10-0 Guarantee: How to Read It Usefully

The advertised 10-10-0 year warranty (compressor – parts – labor) must be interpreted carefully. In real-world situations, the most frequently asked questions are:

• what conditions must be met (registration, interview, evidence),

• how a claim is processed (deadlines, documents, diagnosis)

• what is included and what is not,

• What options exist if one wants additional coverage (when possible)?

At AirGreen, we like to clarify these elements at the time of submission, so that the client knows exactly how their investment is protected.

Recommended maintenance: simple, but crucial for performance

To maintain the benefits of efficiency and comfort, we recommend a clear routine:

• Filters : regular cleaning (more frequent if pets, dust, work).

• Outdoor unit : leaf clearance, snow accumulation control, breathing space.

• Drainage : periodic visual check (especially in winter).

• Preventive inspection : useful for detecting a drop in performance, the beginning of a leak, or internal fouling.

Consistent maintenance is often the difference between a machine that remains stable for years and a machine that gradually "loses" its comfort.

Why choose AirGreen for this type of 24,000 BTU wall-mounted heat pump?

In the greater Montreal area, many offers look similar on paper. The difference is evident in the results:

• We plan the installation according to the reality of the building (and not just according to a “standard” model),

• We install with strict refrigeration discipline (quality of fittings, vacuum sealing, airtightness),

• We place real importance on actual comfort: diffusion, noise, usage routine,

• We remain structured regarding documentation (useful for subsidies and guarantees),

• We favour a transparent approach: you know what is done, why, and how to use it.

Next Step!
For an estimate, sizing validation, or installation of the HAXXAIR V2D R-454B | 24,000 BTU in Montreal , Laval , Longueuil , on the North Shore or South Shore , contact AirGreen. We offer clear recommendations, meticulous installation, and results focused on lasting comfort.