LG ARTCOOL MIRROR Mini Split (Black) | R32 | 12000 BTU

When design meets real performance in heating and air conditioning

In Montreal , Laval , Longueuil , on the North Shore as on the South Shore , we see the same challenge returning year after year: very different dwellings (glass condos, old duplexes, townhouses, bungalows, recent extensions) which nevertheless require the same thing — stable, quiet comfort, and energy consumption that remains reasonable, even when the weather changes tone in a few hours.

In this context, a wall-mounted heat pump shouldn't just "provide heat and cold." It should:

• maintain the temperature smoothly (true comfort is stability),

• manage humidity properly in the summer (otherwise you feel "sticky" even at 22°C),

• to remain discreet in everyday life (noise, vibrations, breath).

• be simple to use (remote control, Wi-Fi, consistent modes),

• and above all, to be installed in a sustainable, clean and intelligent way.

The LG ARTCOOL MIRROR Mini Split (Black) | R32 | 12000 BTU stands out precisely because of this balance: a striking visual signature (black mirrored front, decorative integration) and a modern technical approach ( R-32 refrigerant, integrated Wi-Fi, automatic motorized louvers, filtration, inverter control). At AirGreen, we recommend it when the customer wants a high-end unit that "looks like a decorative piece"... but performs like a truly high-performance HVAC system.

What this model aims for, specifically

This type of device is particularly relevant for:

• Condo or house where the aesthetics of the wall really matter (designer living room, minimalist space, renovated rooms).

• Properties where a quiet appliance is desired for a bedroom or home office.

• Spaces where air conditioning needs to be effective without creating aggressive drafts.

• Residences where a realistic 4-season solution is desired, with heating down to approximately -16°C (depending on conditions and configuration).

We like the positioning of this model: it's not a "basic" heat pump that you install quickly. It's an appliance that you choose because comfort, efficiency, and the final result matter as much as performance.

Technical overview and characteristics that are felt in the field

On your product page, the key elements are clear and useful for planning a solid project:

• Interior model : KNUAK121A

• Exterior model : KUSAB121A

• AHRI : 215413008

• ENERGY STAR® : Yes (including Cold Climate)

• Cooling capacity : 12,000 BTU

• Heating capacity down to : -16 °C

• Refrigerant : R-32

• Wi-Fi : Included

• Voltage : 220V | MCA : 12 A | MOP : 15 A

• Outdoor noise level : 51 dB(A)

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

• LogisVert grant amount displayed : $1020 (updated: November 26, 2025)

In terms of everyday use, the most noticeable aspects in practice are:

• temperature stability (finer regulation),

• quiet sound comfort

• remote control (useful when you are at work or traveling),

• and the ability to cool without "hitting" the air like an overly aggressive air conditioner.

R-32: Why it's a true generational choice

R-32 isn't just a line on a spec sheet. In practice, it's an indicator that the appliance aligns with current trends: efficiency, evolving standards, and better compatibility with modern product lines. The key point for an owner is that:

• We install a recently generated system,

• We avoid equipping ourselves with technology that is "aging" in the market.

• and we are aligning with a trend that is becoming standard across several residential ranges.

For us, it is also a signal about the product ecosystem: parts, support, availability, series logic, compatibilities, and range continuity.

Filtration and breathing comfort: the effect you notice after a few weeks

Many customers initially contact us for heating or air conditioning reasons. Then, after a few weeks of use, they mention something else: the air "seems cleaner", especially during periods when dust and allergens increase.

This model combines:

• a washable pre-filter (easy maintenance),

• a micro-dust type filter (useful for reducing fine particles).

In Montreal and Laval, we often see homes where dust accumulates more quickly: urban traffic, nearby construction, old floors, pets, renovations, etc. A better-designed filtration system doesn't replace a specialized purifier, but it significantly improves the daily experience—especially if maintenance is performed regularly.

AirGreen installation: the details that make the difference between “it works” and “it’s done right”

A successful HVAC installation is a collection of invisible details. And it is precisely these details that determine whether, in 18 months, the customer will say:

• "We forget about it, it still works."
  Or

• "We can hear it, it's dripping, it smells, it's not heating as well, we regret it."

At AirGreen, we have built our method around the points that most often cause problems in quick or improvised installations.

1) Sizing: 12,000 BTU, yes… but for which building?

The 12,000 BTU size is extremely popular because it suits many situations. But "popular" doesn't mean "automatic." Before confirming that a 12,000 BTU is the right choice, we analyze:

• the surface area and actual configuration (open area vs separate rooms),

• the floor (ground floor, top floor, basement),

• Sunlight (large south-facing windows = excessive sunlight in summer),

• insulation and sealing (patio doors, old windows, weatherstripping),

• the presence of internal heat sources (kitchen, computers, servers, home theater).

A common mistake : choosing 12,000 BTU because "that's what everyone uses".
Possible result: short cycles, temperature variations, more noise, reduced actual seasonal efficiency, and sometimes discomfort (too hot / too cold).

Conversely, undersizing can lead to a device that works too hard, without achieving the desired comfort during peak periods.

2) Positioning the wall-mounted head: the art of intelligently diffusing air

Placement is often the most underestimated aspect for a homeowner. Yet, it is crucial.

We are looking for:

• an airflow path that covers the main area without blowing directly onto the sofa or table,

• consistent height and clearance,

• a wall that allows for a clean finish

• a logical path for the pipes and the drain.

A common example in condos : a ceiling fan installed too close to a corner or hallway. Air circulation is poor, creating a hot/cold zone, and the rest of the space remains unevenly heated. As a result, the tenant turns up the thermostat, the unit works harder, and the comfort level is still not uniform.

The goal is simple: to create a stable, natural, and efficient airflow.

3) Piping and insulation: avoiding losses and invisible problems

A wall-mounted heat pump relies on refrigerant lines that must be installed meticulously. A well-executed installation reduces:

• the risks of yield losses,

• unexpected condensation,

• the vibrations,

• and future interventions.

We emphasize:

• high-quality insulation on the lines,

• a clean and protected path,

• a securely fastened assembly, without tension in the elbows,

• neat aesthetics (pipe cover properly aligned, clean passage).

On the South Shore , we sometimes see units where the lines have been installed too tightly, by forcing angles. In the short term, it works. In the medium term, it vibrates, strains the connections, and the finish deteriorates.

4) Drainage: the small detail that prevents major disasters

Drainage is one of the main sources of complaints in air conditioning, especially during humid summers.

We are checking:

• the actual slope (not “by eye”, but reliably),

• the exit point and the route,

• the absence of counter-slopes,

• security against odor backflow,

• and protection against blockages.

Typical scenario : “It was fine for a month, then it started to leak.”
In almost all cases, the drain didn't have a sufficient slope, or the passage created a reverse slope. At AirGreen, we test the drainage system and explain to the client how to prevent blockages (dust, micro-debris, etc.).

5) Noise and vibrations: a real requirement in Montreal, Laval and Longueuil

A significant portion of customers choose ARTCOOL for its everyday experience: they want a discreet system.

For the acoustic comfort to be truly effective:

• The fixing must be solid.

• The wall must be suitable.

• The lines must not be under tension.

• The outdoor unit must be installed intelligently (suitable support, stable surface, clearance).

A case we addressed in Longueuil : an outdoor unit mounted on a resonant structure. The system provided adequate heating, but the noise traveled through the framing. The solution involved redesigning the base, the mounting bracket, and the decoupling system. Result: a significant reduction in perceived noise.

6) Wi-Fi: useful when used as a true convenience tool

Built-in Wi-Fi is more than just a gadget if you configure it intelligently.

Practical application:

• stabilize the temperature before returning home.

• manage a schedule (slightly reduce it during the day, increase it before arrival),

• avoid unnecessary overheating,

• monitor the operation quickly.

Two common mistakes :

1. Constantly adjusting the thermostat: the device never has time to stabilize.

2. Using gaps that are too large: you lose stable comfort and you push the system unnecessarily.

At AirGreen, we recommend a simple approach: a base temperature, slight adjustments, and consistent schedules.

Two real-life AirGreen scenarios: what changes in daily life

We always prefer to talk about what happens on the ground, because that's where systems are truly judged.

Real-life example: Montreal (Rosemont) — stable comfort in a renovated 4½

Context : renovated apartment, beautiful finish, open area living room-kitchen, large windows.
Initial problem : noisy portable air conditioner, poorly managed humidity, expensive electric heating at peak times.
Solution : installation of a 12,000 BTU wall-mounted heat pump with ARTCOOL head, placement designed to blow towards the main air circulation axis.
Result : more stable temperature, low perceived noise in the evening, better summer comfort (less humidity), and appreciated decorative integration.

This type of project always reminds us of one thing: a high-end device is fully appreciated when the installation and placement are impeccable.

Real-life case: Laval (Duvernay) — preventing problems in the spring

Context : house with semi-finished basement and periods of humidity in the mid-season.
Anticipated problems : odors, imperfect drainage, inconsistent comfort in air conditioning.
Approach : careful drainage, thoughtful maintenance access, clear explanation of maintenance (filters, light cleaning, seasonal routine).
Result : more consistent comfort, better feeling of freshness without overcooling, and simple maintenance for the owner.

Grants and eligibility: avoiding rejections and wasted time

Many homeowners come to this page with questions about programs. The most common mistake is believing that eligibility depends solely on the model.

In reality, what matters is complete consistency:

• the correct interior/exterior model numbers

• the associated documentation,

• a compliant installation

• and clear traceability of information.

At AirGreen, we address these elements from the outset, because an incomplete or inconsistent file quickly becomes a source of frustration.

For whom is this LG ARTCOOL MIRROR (Black) an excellent choice?

This model is particularly suitable if you are looking for:

• a wall-mounted heat pump that blends into the decor (modern look, black mirror finish),

• a discreet and pleasant device for everyday use.

• a reliable solution for efficiently air conditioning a main area

• realistic 4-season comfort in Montreal , Laval , Longueuil , North Shore , South Shore .

Situations where we often recommend it

• Main living room of a condo or modern house

• Home office (where noise becomes a daily irritant)

• Open-plan area with kitchen (where internal heat greatly influences comfort)

• Renovated properties where finishing and aesthetics are paramount.

Limitations to be aware of (and how AirGreen manages them)

Even an excellent system always has parameters that must be respected.

• Zero-year labor warranty : this makes choosing the right installer even more important. A thorough and documented installation, with solid after-sales support, becomes a real asset.

• The 12,000 BTU must be validated according to your building: we do not offer a "standard" format.

• The location and routing of the lines influence sound comfort and durability: we plan, we don't "tinker".

Our project completion method: what we systematically confirm

Before leaving, we confirm:

• complete startup and operation in heating/cooling modes,

• control of the flaps and air diffusion,

• Drainage tested (not just assumed).

• simple and clear instructions for use,

• Maintenance routine: filters, cleaning, best practices,

• final check of the finish (pipe cover, sealing, cleanliness).

It is often this last step that transforms an installation into a solid customer experience: the owner understands their system, knows what to do, and above all knows what to avoid.

Why choose AirGreen for this model?

In Montreal , Laval , Longueuil , the North Shore and the South Shore , our value is not limited to the product. It is reflected in:

• the accuracy of the dimensioning,

• the quality of the placement,

• the finish,

• the stability of comfort season after season

• and our ability to avoid costly mistakes later on.

We install this type of heat pump as a complete HVAC project: a solution designed to last, not a quick fix.

Do you want a clear price and a tailored recommendation?

Contact AirGreen for an estimate and a complete installation proposal for the LG ARTCOOL MIRROR Mini Split (Black) | R32 | 12000 BTU : validation of the correct format, choice of location, clean finish, and support for a simple, reliable and durable experience.