LG ARTCOOL PRESTIGE R32 Wall-Mounted Heat Pump | 15,000 BTU (-25°C)

A wall-mounted heat pump designed for real comfort in Montreal, even when winter is unforgiving.

When a homeowner calls us in the middle of January because "the heat pump is working, but we're still cold," it's almost never a simple problem with the unit itself. Very often, it's a combination of poor placement , inadequate settings , an outdated electrical system , or a unit that was never properly installed. In Montreal and the surrounding area, we see the same story repeated: a decent product can become disappointing if the installation and support aren't up to scratch.

It is precisely in this reality— Montreal apartment buildings , condos , single-family homes , partial renovations, varying insulation levels, and high aesthetic standards—that the LG ARTCOOL PRESTIGE R32 | 15,000 BTU (-25°C) Wall-Mounted Heat Pump truly shines. At AirGreen , we recommend it when the client seeks a serious balance between:

• heating that can be used down to -25°C (not just a promise),

• comfortable air conditioning for everyday use

• simple and modern control ( WiFi included ),

• an interior unit that can remain discreet and pleasant in a living room.

• an approach compatible with current expectations regarding energy efficiency and subsidies.

We do not present it as a "magic" solution. We present it as a coherent solution, provided that best practices are followed.

What owners are really looking for (and what we systematically approve)

The requests are rarely technical at the outset. They are human, concrete, and very understandable:

• "Am I going to stop chasing after the thermostat?"

• "Will I finally be able to sleep without noise or drafts?"

• "Is it really worth it compared to a cheaper model?"

• "Am I likely to have problems with ice outside?"

• "Will my installation be clean or will it look like a DIY job?"

• "Can I get a LogisVert grant without struggling with the paperwork?"

Our work begins with a structured visit: understanding the building, understanding the lifestyle, then recommending a configuration that works.

Key information from the model (that which influences installation and use)

This system is identified by specific references:

• Indoor unit: KNSAL151A

• Outdoor unit: KUSAL151A

• AHRI Number: 215828274

• WiFi: included (remote management via the LG environment)

• Refrigerant: R-32

• Certification: ENERGY STAR®: Yes

• Certification: ENERGY STAR® Cold Climate: Yes

• ENERGY STAR ID: 3721917

• Provincial grant (LogisVert) displayed: $1308 (updated: November 26, 2025 )

• Advertised warranty (Compressor – Parts – Labor): 10-10-0 years

• Additional warranty: possible

In terms of dimensions and physical installation, the indoor unit measures approximately 41.72 × 10.44 × 14.19 inches , and the outdoor unit approximately 44.88 × 17.91 × 36.16 inches . This detail is more important than it seems: in many houses and duplexes, a few inches can determine whether the installation is elegant… or if you end up having to improvise.

Why R-32 is a logical choice today, especially for a long-lasting installation

The R-32 rating is not a "decorative" argument. For the customer, what it actually changes is primarily:

• a technology that aligns with the current trend among new generations,

• a more modern approach that aims for better consistency with evolving practices,

• availability and market logic that promote sustainability.

At AirGreen, we like solutions that age well. A heat pump isn't an impulse purchase: it's equipment that needs to remain relevant for a long time.

Comfort isn't just about BTUs: stability, airflow, and intelligent control are also key.

Many people think, "15,000 BTU is 15,000 BTU." In reality, the perceived output depends on three things:

1. Stability : avoid large temperature fluctuations.

2. Diffusion : avoid unpleasant direct airflow.

3. Control : enabling simple, consistent habits without constant manipulation.

The ARTCOOL PRESTIGE is particularly interesting because it is designed to manage comfort in a more refined way, notably through automatic control of the shutters (vertical and horizontal) and a modulation logic more suited to residential use.

Noise: a sensitive issue in condos, duplexes and open-concept houses

In Montreal, noise is often the trigger for a replacement. We regularly hear:

• "The compressor wakes everyone up when it starts up."

• "I can hear the vibration in the wall."

• "It sounds like it's echoing up the stairs."

On this model, the indoor unit is advertised at 30/49 dB(A) depending on the mode and speed. In real-world use, this means that quiet operation can be achieved if:

• The unit is fixed to a solid support.

• The anchors are well made.

• The piping is managed properly.

• The commissioning is set to avoid "yo-yo" (abrupt starts/stops).

The outdoor unit, advertised at around 56 dB(A), is perfectly manageable, but location is crucial. A well-placed unit may seem discreet. The same unit, however, if poorly placed, against a structure or facing a wind corridor, can become a source of complaints.

How AirGreen installs this model to maximize performance, subsidy, and lifespan

A successful HVAC installation is a series of technical and practical decisions. Here's our approach, as applied to an LG ARTCOOL PRESTIGE 15,000 BTU unit.

1) Sizing: avoid the trap of “too small” and “too big”

The 15,000 BTU is often perfect for a main living area, but let's be honest: efficiency depends on the building.

• In a duplex with shared walls, heating can be easier to maintain.

• In an open-plan house in Laval or on the North Shore , the volumes and ceilings change everything.

• In a condo in Longueuil , internal gains (sun, cooking, appliances) change the need.

Our rule: we don't just size "by square foot". We look at insulation, orientation, lifestyle habits, and the actual configuration.

2) Indoor unit location: comfort + aesthetics + maintenance

An interior unit is an object you see every day. We are looking for:

• A positioning that avoids direct airflow onto the sofa, table, or bed.

• a height and access that allow for realistic maintenance (filters, cleaning),

• a path that limits gullies and “strange angles”.

In many Montreal neighborhoods, clients want a flawless finish. We place great importance on this: a clean and discreet installation is also one that will be better accepted on a daily basis.

3) Piping: this is where leaks, vibrations, and longevity come into play

This model uses typical 3/8" – 5/8" piping. In practice, this means:

• good quality brazing

• a properly executed vacuum test

• adequate mechanical protection (to avoid friction and micro-vibrations),

• a consistent length (without unnecessary excess),

• Pipe insulation must be properly installed (otherwise condensation, losses and aesthetic problems).

Most of the “minor problems” that people attribute to the machine actually stem from poorly executed piping details.

4) Electrical: compliance, safety, and stable operation

We're talking about a 220V power supply, with protection parameters like MCA 19A and MOP 30A . Translation for a homeowner:

• The device deserves a suitable circuit.

• a well-chosen circuit breaker,

• a compliant installation that limits tripping and overheating.

We often see the mistake of "we'll reuse what's already there." Sometimes it works. Sometimes it creates instability or non-compliance. At AirGreen, we do things properly and with documentation.

5) Outdoor unit in winter: snow, ice, clearing, and defrost cycles

Very low temperature heating isn't just a matter of "the device being capable." It requires:

• an elevated support,

• sufficient clearance,

• intelligent guidance,

• avoid areas where snow accumulates,

• avoid places where cold air returns to the device (recirculation).

On the South Shore , we often see yards exposed to the wind. On the North Shore , there are more significant snow accumulations. Our approach: install the equipment so it can breathe, defrost properly, and remain accessible.

6) Commissioning: the difference between a "working" installation and a "high-performing" installation

Commissioning is when an installation is transformed into a result.

• calibration and parameter verification

• functional tests in heating and air conditioning,

• drainage check

• vibration control,

• WiFi configuration,

• explanation to the client (usage and best practices).

Many owners just want it to work. We want it to work well , and for a long time.

AirGreen Case Study: Laval, Stable Comfort and Uncomplicated Remote Control

A customer in Laval had an old heat pump that was noisy and caused temperature fluctuations. The main problem: sudden starts and poor air distribution.

After installing the LG ARTCOOL PRESTIGE R32 , we have:

• The interior layout was optimized to avoid drafts affecting the office space.

• stabilized the configuration to reduce variations,

• configured the WiFi so that the client can easily manage their schedule.

• The drainage system has been validated to avoid any risk of droplets.

Customer feedback: more consistent comfort, reduced noise in night mode, and remote management has become a daily reflex.

AirGreen Case Study: Montreal, Condos and Aesthetic Requirements

In a Montreal condo, the client wanted a virtually invisible installation. The challenge: a limited pipe run and a facade to respect.

We have been working on:

• an optimized passage (fewer channels, cleaner corners),

• an interior positioning focused on comfort,

• an outdoor location that limits resonance on the structure.

The client mainly took away one thing: the installation “is part of the decor” instead of being a visual compromise.

Mistakes to avoid (those that cost dearly in hindsight)

Even with an excellent product, some errors recur:

• Oversizing : shorter cycles, less stable comfort, lower actual efficiency.

• Undersizing : baseboards that take over too often, frustration in very cold weather.

• Installing the exterior too low: snow, ice, difficult access, complicated defrosting.

• Installing the outdoor unit too close to a wall: reduced airflow, increased noise.

• Neglecting vibrations: propagation in the structure, especially in duplexes/condos.

• Poor usage management: some customers set the thermostat to 26°C continuously and then complain about "dry" air or excessively high bills. Smart settings make all the difference.

Usage tips that we always give (and that really improve the experience)

Without turning this article into a "manual", here are some habits that yield better results:

• For heating: favour a stable temperature setting rather than constantly raising/lowering it.

• Use the schedules: comfort when you are there, savings when you are not.

• Clean the filters: a dirty filter means less airflow and more noise.

• Avoid obstructing the indoor unit: curtains and furniture can impede diffusion.

• Scheduling periodic maintenance is often the best way to prevent unpleasant surprises.

Guarantee: clarify the “10-10-0” to avoid misunderstandings

The advertised warranty is 10 years for the compressor , 10 years for parts , and 0 years for labor (according to the information provided). This point is important: many customers think that "10 years" means "everything is covered." In reality:

• The manufacturer covers according to its terms and conditions (parts/compressor).

• Labor costs depend on the contract, additional protections, or extended warranty options.

• Installation maintenance and compliance protect your investment.

At AirGreen, we explain this clearly from the outset, because it is an essential element of transparency.

LogisVert subsidy: how to avoid unnecessary blockages and delays

The advertised grant of $1308 can make a real difference. But applications become complicated when the following are missing:

• the exact references (interior/exterior models),

• the AHRI number ,

• clear documentation of the installation,

• consistency in the evidence.

Our method: document properly from day 1, to avoid administrative “backtracking”.

Why choose AirGreen for this LG heat pump in Montreal, Laval, Longueuil, North Shore and South Shore

A quality product is important. But what makes the difference is what you receive after the purchase :

• a structured and compliant HVAC installation ,

• A clean and thoughtfully designed finish for your building.

• a serious commissioning,

• realistic guidance on usage,

• solid documentation (useful for grants and monitoring).

We operate every week in Montreal , Laval , Longueuil , on the North Shore and the South Shore , and we know how to adapt an installation to the terrain: plex, condo, house, renovation, aesthetic constraints, electrical constraints.

Next Step!

Want to know if the LG ARTCOOL PRESTIGE R32 | 15,000 BTU (-25°C) Wall-Mounted Heat Pump is right for your space, your desired comfort level, and your eligibility for LogisVert ? Contact AirGreen for an on-site estimate and a clear recommendation based on your building and your goals.