LG R32 Central Heat Pump | 2.5 Tons - 30,000 BTU

A central heat pump designed for our winters, with an installation process that avoids unpleasant surprises.

At AirGreen, we install central systems in a wide variety of settings: tight Montreal duplexes, single-family homes in Laval , newer condos in Longueuil , and windier properties on the North and South Shores . A central heat pump can be excellent… and yet disappoint if the ductwork, wall controls, humidity management, or even the outdoor location were rushed. That's precisely why we prefer to work with coherent, well-documented systems that are tailored to our local conditions.

The LG R32 Central Heat Pump | 2.5 Tonnes – 30,000 BTU is one of those solutions that lends itself very well to a serious residential installation: it combines a central format (with ducts), a nominal capacity relevant for a large portion of the building stock in the greater region, and a "multi-position" approach to indoor air treatment that simplifies integration into mechanical rooms that are sometimes very constrained.

What the customer really wants (and what we deliver)

When someone calls us about a central heat pump , the request is almost never "I want 30,000 BTU." The actual request is more like this:

• "I want to stop being too hot upstairs in the summer and too cold in the winter."

• "I want a stable system, not a machine that starts and stops all the time."

• "I want consistent comfort, not one perfect room and two unassailable ones."

• "I want to reduce my bill without sacrificing comfort."

• "I want a clean installation that maintains itself well and doesn't become a headache."

Our role at AirGreen is to transform this request into a complete project: sizing , integration into the ductwork, control placement, commissioning, adjustments, and maintenance plan. The LG R32 2.5-tonne unit is very well suited to this approach, provided that site regulations are followed.

Exterior/interior combination: a coherence that matters

This central heat pump relies on an outdoor/indoor pair: an outdoor unit KUSXB301A and an indoor unit KNSLB301A . To the customer, this might seem like "just numbers." For us, it's key information: it ensures that the system is designed as a whole, with compatible parameters (airflow, controls, protections, performance).

During installation, this avoids several common problems:

• an indoor unit that is too "restrictive" and stifles the airflow;

• approximate control settings;

• actual performance that does not match expectations;

• longer, and therefore more expensive, service interventions.

Understanding performance: efficiency, modulation, humidity, and temperature stability

Seasonal efficiency: why we don't look at a single number

The market likes to reduce a heat pump to an efficiency rating. In reality, that's only part of the story. Yes, ratings like SEER2 , EER2, and HSPF2 provide important information about energy consumption. But the comfort you experience depends primarily on the system's ability to modulate the airflow, the actual air delivery rate to the rooms, and the quality of the ductwork.

At AirGreen, we systematically evaluate:

• the level of insulation and the quality of the building envelope (especially in several areas of Montreal where renovations are uneven);

• the window rate (a major factor in condos and renovated houses in Longueuil or on the South Shore );

• the thermal behavior of the floors (the upper floors often "overheat" in the summer);

• orientation and solar gain (large south-facing windows);

• uses (teleworking, frequent cooking, home gym).

Only then do we choose a size and prepare for integration.

Modulation: true comfort is when the machine doesn't need to "force" itself.

One of the advantages of a modern system is its ability to modulate its power. In real life, your home almost never needs maximum power. It needs power that's appropriate for the moment: a warm but not scorching afternoon, a cold, windy night, a sudden thaw, winter sun warming a glass-enclosed living room.

When a system can better adjust itself:

• the temperature stabilizes (fewer fluctuations);

• humidity is better controlled in summer (less of a "sticky" feeling);

• the machine avoids short cycles (less wear, more silence);

• Comfort becomes more consistent from one room to another.

Humidity management: the detail that changes the feeling

Many homeowners believe that air conditioning is "just about cooling." In reality, the feeling of comfort in summer depends as much on humidity as on temperature. A house at 24°C can be uncomfortable if the humidity is too high. Conversely, a house at 25°C can be very pleasant if the humidity is properly managed.

With a central heat pump, dehumidification is directly related to:

• the duration of the cycles (too short = limited dehumidification);

• airflow (too high on the coil = less moisture removal);

• the quality of the return air network;

• the wall control settings.

That's why we insist on balance: we're not looking for "the coldest possible", we're looking for the most comfortable possible .

The multi-position indoor unit: a tangible advantage in Greater Montreal homes

Why does "multi-position" help us so much in the field?

In the greater region, we see a wide variety of mechanical rooms:

• basements with low ceilings;

• small technical rooms in condos;

• existing installations with conduits already in place;

• narrow spaces around stairs or beams.

A multi-position indoor unit allows for easier adaptation to these constraints, without imposing compromises that would negatively impact future service. In short: the system can be integrated more intelligently, with reasonable maintenance access, proper drainage, and a less convoluted duct network.

Wall control: an often overlooked but essential point

A central heat pump with an air handler isn't managed like a wall-mounted unit with a remote control. Here, the wall control is a central element of the customer experience. And that's often where "quick" installations start to show signs of wear and tear.

At AirGreen, we carefully choose the location of the control:

• away from a blower vent;

• away from an outside door or a draft;

• at an appropriate height;

• in a representative area of ​​the house.

A typical mistake: installing the control unit in a very cold or very hot hallway, which doesn't represent the living room or the upstairs area. As a result, the system "thinks" it's too hot or too cold, and it compensates poorly.

The ductwork: the place where a central heat pump gains (or loses) power

The reality: many homes have pipes that aren't ready

We're very transparent about this: a central heat pump can't outperform a problematic ductwork system. And in many areas of Montreal (renovated plexes, successive additions, modified ductwork), this system is often the weak point.

Typical signals of a network that needs correction:

• some rooms receive "almost nothing";

• significant noise at the grilles;

• doors that move when the fan starts (pressure);

• significant differences between the upper floor and the ground floor;

• Excessive dust and ineffective filtration.

Our AirGreen method: inspection, targeted corrections, then adjustments

Before finalizing a project, we evaluate:

1. Air return : quantity, position, path.

2. Plenums : clean transitions, sealing.

3. Bends and constrictions : points of restriction.

4. Leaks : air loss in unwanted areas.

5. Balancing : ability to adjust piece by piece.

In some projects in Laval (larger houses), we see ducts that are "too generous" in one area and too small in another. In Montreal , it's often the opposite: an older, dense network with significant architectural constraints. In both cases, the final comfort depends on our ability to treat the network as a self-contained system.

Filtration: simple in appearance, crucial in practice

The filter is a small component… that can ruin performance if neglected. A filter that is too restrictive or too dirty increases resistance, reduces airflow, and can cause:

• decreased comfort;

• increased noise;

• overconsumption;

• Risk of icing (depending on conditions).

We always explain to the customer:

• what type of filter to use;

• how often to check it;

• how to recognize the signs of a problematic filter;

• Why "best filter" doesn't always mean "most restrictive filter".

Outdoor installation: snow, wind, clearances and perceived noise

The outdoor location is not a detail

In Greater Montreal, we have to deal with:

• heavy snow and accumulation;

• freeze/thaw cycles;

• sustained winds (particularly on the South Shore and some open areas of the North Shore );

• proximity to windows and bedrooms (perceived noise);

• property boundaries and neighborhood.

Our approach:

• solid base (slab/support) and anti-vibration;

• adequate clearances for breathing and service;

• positioning which avoids blowing towards a narrow passage (resonance effect);

• planning of the defrost water flow.

A well-placed system lasts longer, is easier to maintain, and "disappears" into everyday life.

Noise: what we promise, and what we avoid promising

The noise level depends as much on the installation as on the machine:

• supports and vibrations;

• distance of windows;

• reflection on walls, fences and corners;

• air velocity in the ducts.

That's why we always talk about "perceived noise". A careful installation can make a machine very quiet, while a poor location can turn a normal unit into a source of irritation.

Electricity and commissioning: the foundation of reliability

Power supply, protections and compliance

A central heat pump must be properly powered and protected. In some older Montreal homes, electrical planning is a significant part of the project (panel capacity, available space, existing circuits, wiring organization).

At AirGreen, we check:

• the panel capacity and the available margin;

• the quality of the connections;

• the choice of protective equipment;

• clean and safe passage of electrical conduits.

This is an often invisible point… but crucial for long-term reliability.

Commissioning: the stage where an "installation" is transformed into a "high-performance system"

A proper commissioning includes:

• checking blowing temperatures;

• validation of airflow;

• control of operating parameters;

• inspection of drains and tank;

• validation of sequences (heating, air conditioning, defrosting);

• explanation to the customer of the necessary settings (without jargon).

We don't want the customer to end up with a high-performing system that they don't understand. Good control and proper settings prevent most frustrations.

Concrete scenarios: what we see in Montreal, Laval, Longueuil, the North Shore and the South Shore

Scenario 1 — Laval (Fabreville): uneven floors, comfort varying depending on the time of day

In a typical house, the upper floor can overheat as soon as the sun hits it, while the ground floor remains at a comfortable temperature. The goal is to even out these differences. In this type of project, our most effective interventions are often:

• air return optimization (very often the #1 factor);

• fine balancing of the vents (piece by piece);

• wall control adjustment to avoid overcompensation;

• checking for leaks in the pipes.

Result: more uniform temperature, fewer variations, and a house that "holds up" better during hot days.

Scenario 2 — Montreal (Rosemont / Petite-Patrie): old network, access constraints

In a duplex or an older house, the wiring system may be a mix of sections from different eras. Here, a successful installation depends primarily on:

• proper transitions towards the plenum;

• sealing of the fittings;

• future access to panels and filtration;

• Impeccable condensate drainage.

A central heat pump must remain serviceable. If access is impossible, maintenance becomes neglected, and performance drops.

Scenario 3 — Longueuil: large windows, humidity management and summer comfort

In many houses and condos, windows can generate significant solar gain. In the summer, this creates two challenges:

• the temperature can rise rapidly;

• Humidity becomes a major comfort factor.

Our job is to adjust the machine and the air handler to achieve stable comfort, not just a quick "feel of cold".

Scenario 4 — North Shore / South Shore: wind, clearings and more exposed external conditions

In more open areas, wind and snow accumulation become important variables. We then plan:

• a smart outdoor location;

• a stable base;

• sufficient clearance for the unit to breathe;

• flow management during defrosting.

It's the kind of detail that prevents trouble in the middle of winter.

Common mistakes (and the best practices we apply)

Mistake 1: Oversizing to "be certain"

Oversizing is one of the most frequent causes of disappointment:

• short cycles;

• humidity control is less effective;

• uneven comfort;

• accelerated wear.

We scale for reality, not for fear.

Error 2: Ignoring the air return

Without proper air return:

• the flow rate drops;

• the noise is rising;

• some rooms become uncomfortable;

• The system is working too hard.

We treat the return air system as a technical priority, not as a detail.

Mistake 3: Installing the wall control in the wrong place

A poorly placed control can ruin the experience. We choose the location like we choose the location of a sensor: where it represents the house.

Mistake 4: Neglecting condensate drainage

A poorly installed drain can cause damage, odors, and downtime. We consider drainage a critical element, especially in basements.

HVAC maintenance: maintaining efficiency and preventing breakdowns at the worst possible time

What we specifically recommend

To protect your investment, we emphasize:

• filter : frequent inspection, replacement as needed;

• Indoor unit : preventative cleaning as needed (dust, hair, work);

• drain : inspection, cleaning, prevention of blockages;

• outdoor unit : clearance, gentle cleaning, seasonal inspection;

• control : updating settings according to your usage (teleworking, presence, etc.).

What the interview actually changes

Regular maintenance involves:

• a more stable airflow;

• improved efficiency;

• less noise;

• more consistent comfort;

• less risk of interruption during critical periods.

Why choose AirGreen for your LG R32 central heat pump

We don't just sell a machine. We deliver a complete, integrated, tuned and maintainable system.

At AirGreen, we stand out because of:

• a sizing approach based on your building;

• serious attention to the network of conduits;

• a clean installation, planned for future service;

• a complete commissioning, with clear explanations;

• a strong local presence in Montreal , Laval , Longueuil , North Shore and South Shore .

Conclusion: a solid central solution, provided it is treated as a complete project

The LG R32 Central Heat Pump | 2.5 Tonnes – 30,000 BTU is a very relevant solution for many residential buildings in the greater region, especially when looking for stable comfort, homogeneous air distribution and a system designed for our reality.

If you are considering installing a central heat pump in Montreal , Laval , Longueuil , on the North Shore or the South Shore , we can quickly validate if this model is suitable for your home, your ducts and your comfort objectives.

Next Step

Contact AirGreen today for an estimate, sizing recommendation, and a clear quote for your heating , cooling, and HVAC installation project. We'll help you choose the right configuration, optimize air distribution, and achieve a durable, comfortable, and easy-to-maintain result.