LG: LGRED 3X3 Cassette Type Ceiling Mounted | 30,000 BTU

A four-way cassette designed for large spaces where comfort must remain discreet

The LGRED 3X3 LG cassette ceiling unit | 30,000 BTU is aimed at owners, managers, and contractors who want to efficiently heat and cool a large area without installing a visible wall-mounted unit. At AirGreen, we recommend this type of HVAC solution when interior aesthetics, uniform air distribution, and cold weather performance must be treated with equal seriousness.

This single-zone system combines the KNSCB301A indoor unit and the KUSXA301A outdoor unit, with a nominal capacity of 30,000 BTU in cooling and heating performance designed for Quebec winters. Its LG technical sheet indicates a cooling capacity of 12,000 to 36,000 BTU/h, a heating capacity of 14,000 to 40,000 BTU/h, a SEER2 of 25.0, an EER2 of 15.20, and an HSPF2 of 10.40, very relevant data for high-end residential buildings, businesses, offices, open-plan areas, and certain multi-housing projects.

Unlike a standard wall-mounted unit, a 3X3 ceiling cassette integrates into the ceiling and distributes air in four directions. This detail changes a lot on the ground. In an open space in Montreal, a business in Laval, an office in Longueuil, or a common area on the South Shore, air circulation must reach occupants without creating an unpleasant cold draft above a desk, workbench, or service counter. Four-way diffusion allows for better air distribution, reducing areas that are too hot near windows and areas that are too cold near the unit.

An HVAC solution suitable for commercial ceilings, spacious condos, and open-plan areas

The cassette format of this LG model is particularly suitable for places where walls are already occupied by windows, storage, displays, or architectural divisions. We often see it in projects where a wall-mounted unit would be technically possible but visually undesirable.

The most frequent applications for this type of LGRED cassette heat pump include:

• Retail stores with front windows and variable foot traffic.
• Professional offices where acoustic and visual comfort is important.
• Restaurants, cafes, and service salons with open areas.
• Condos or penthouses with suspended ceilings or technical drops.
• Common areas in multi-housing units where air must be distributed without a dominant wall unit.
• Service premises in Longueuil, Laval, Montreal, North Shore, and South Shore requiring a robust and well-integrated HVAC solution.

With interior dimensions of approximately 37.38 x 37.38 x 9.38 inches, the unit requires serious ceiling planning. This is not an appliance to be installed lightly. Before proposing this cassette, we validate the structure, available space above the finished ceiling, drain management, refrigerant piping, electrical supply, and outdoor location. The manufacturer's technical drawings, particularly pages 2 and 3 of the LG datasheet, clearly show the dimensions of the outdoor unit, ceiling opening, suspension points, and required connections.

LGRED: a tangible advantage for winter heating in Quebec

LGRED technology is an important element of this product, as it aims to maintain heating capacity in cold weather. For the Quebec market, this point is crucial. In Montreal, Laval, Longueuil, on the North Shore, and on the South Shore, a heat pump must be evaluated not only for its summer cooling but also for its behavior when the temperature drops below freezing.

The LG sheet indicates maximum heating capacities of 36,200 BTU/h at 17°F, 34,000 BTU/h at 5°F, 30,000 BTU/h at -4°F, and 28,250 BTU/h at -13°F, or approximately -25°C. These figures explain why this cassette can be relevant for projects where primary or supplementary heating must remain reliable during a good part of the winter.

That said, at AirGreen, we don't sell capacity on paper without analyzing the building. Two 1,200 sq ft spaces can have very different needs. A glassed-in space exposed to the north in Boucherville does not behave like an interior space in an office building in Montreal. A 9-foot ceiling does not impose the same load as a 14-foot ceiling. A business with frequently opening doors also requires a different interpretation of the thermal load.

Our job is to connect product data to building reality: insulation, windows, headroom, occupancy, internal appliances, solar orientation, ambient noise, and site constraints.

Energy performance, eligibility, and subsidies: what you need to know

This model is designated as ENERGY STAR® and ENERGY STAR® Cold Climate, with ENERGY STAR ID 3544265 and AHRI number 214826535 listed on your product sheet. For eligible residential customers, your product page also mentions a provincial LogisVert subsidy of $2,448, updated on November 26, 2025.

Hydro-Québec presents LogisVert as a financial assistance program for energy efficiency measures, including heat pumps, and specifies that assistance of up to $6,700 may apply to the purchase of an ENERGY STAR heat pump, according to program conditions. As of November 26, 2025, Hydro-Québec also indicates that installed heat pumps must be ENERGY STAR® certified to be eligible for LogisVert financial assistance.

In our quotes, we always validate eligibility at the time of the project. A subsidy depends on several factors: building type, installed equipment, installation date, administrative requirements, proof of purchase, eligible contractor, and compliance of the installation. This verification avoids misunderstandings and allows the client to compare their investment with clear information.

R-32, efficiency, and maintenance: important details after installation

The R-32 refrigerant gas used by this system is an important point for owners looking for a current HVAC solution. R-32 allows for good energy performance and is part of the gradual market transition towards refrigerants with lower impact than several older generations of fluids. For the user, however, the essential remains the quality of the installation: line length, brazing or connection according to manufacturer's requirements, leak test, rigorous vacuuming, additional charge if necessary, and complete startup.

The LG sheet specifies 3/8 inch piping for the liquid line and 5/8 inch for the vapor line, a minimum/maximum equivalent length of 16.4 to 164 ft, a length without adding refrigerant up to 24.6 ft, a maximum elevation of 98.4 ft, and a refrigerant addition of 0.43 oz/ft beyond the prescribed parameters. These data are not just technical details: they directly influence performance, noise, compressor durability, and heating stability in cold weather.

For maintenance, we emphasize three points:

1. Regular cleaning of filters and grille to maintain airflow.
2. Checking the drain and integrated condensate pump, especially in suspended ceiling installations.
3. Annual HVAC inspection to confirm the condition of the coil, connections, wiring, operating pressures, and water drainage.

A poorly maintained ceiling cassette can lose efficiency faster than a client might think. In a business where dust, hair, textile particles, or renovation debris circulate in the air, filters can quickly become clogged. We therefore adapt our HVAC maintenance recommendations according to the actual use of the premises.

Why AirGreen installs this LG cassette with a tailored approach

Installing a 3X3 cassette requires more than a simple connection

A cassette heat pump installation requires more extensive coordination than a wall-mounted installation. The ceiling must allow for the integration of the indoor unit, the passage of refrigerant lines, the drain, electrical power, and future access for maintenance. The outdoor unit, for its part, measures approximately 37.41 x 13 x 54.25 inches and produces a sound pressure level of approximately 54 dB(A) according to your product sheet data.

Before confirming the installation, we analyze:

• The ideal location of the cassette for balanced diffusion.
• The ceiling height and the actual range of the airflow.
• The possibility of evacuating condensate with a slope or via the integrated pump.
• The path of the refrigerant lines between the inside and outside.
• Protection against snow, ice, and prevailing winds for the outdoor unit.
• Access to service panels.
• Electrical requirements: 220 V, MCA 32 A, MOP 35 A according to your product sheet.
• The type of use: residential, commercial, or multi-housing.

We have seen, on some construction sites, cassettes proposed too close to a wall or too centered on an aesthetic constraint without taking into account the actual occupancy of the space. The result is predictable: one area receives too much air, another remains uncomfortable, and the user unnecessarily increases the setpoint. Our approach avoids this problem by prioritizing performance over ease of installation.

Field example: an open-plan commercial space on the South Shore

During a commercial air conditioning project on the South Shore, our team was called to replace an old wall-mounted solution that was not distributing air correctly. The premises had a glass facade, a service counter at the front, and workstations in the center. The old unit blew directly towards employees, while customers near the entrance still felt the heat in summer.

A 3X3 type ceiling cassette represented a much more coherent solution. The ceiling placement freed up the walls, improved the appearance of the premises, and distributed air in several directions. The most striking difference noted by the client was not only the temperature displayed on the thermostat but also the disappearance of comfort discrepancies between the front and back of the business.

This type of experience guides our recommendations. A good HVAC solution is not just about choosing a BTU number. It's about understanding how air moves in an occupied space.

Residential example: a spacious condo in Montreal with a suspended ceiling

In a large condo in Montreal, a wall-mounted unit would have been visible from the entrance and would have blown directly into the living room. The client wanted a more discreet solution but did not want a fully ducted system due to ceiling constraints. A 3X3 cassette allowed for an interesting compromise: ceiling integration, comfortable diffusion, and reasonable access for maintenance.

In this type of project, we pay particular attention to indoor noise. The LG model shows an indoor sound pressure of approximately 40 / 42 dB(A) according to the data provided, which is suitable for several living environments, provided that the installation is well executed and that the structure does not transmit unnecessary vibrations.

Useful everyday functions

This LG model includes several interesting functions for residential or commercial use:

• Variable speed Inverter compressor, to adjust capacity according to actual demand.
• Integrated condensate pump, useful in ceilings where gravity drainage is limited.
• Jet Cool / Jet Heat, to reach the setpoint more quickly.
• Auto Restart, practical after a power interruption.
• Auto Changeover, to automatically switch between heating and cooling as needed.
• Ultra-quiet turbo fan, according to the manufacturer's design.
• Night Quiet Function, useful when the outdoor environment requires attention to noise.

The PWLSSB21H wireless remote control is included according to the LG specification sheet, while the PT-AAGW0 grille is among the required accessories. Other accessories may be considered depending on the project, including a WiFi module, wall controllers, dry contacts, centralized management gateways, or a panel with air purification depending on the building's needs.

Common mistakes to avoid with a ceiling cassette

A 30,000 BTU LG cassette can offer excellent comfort, but some choices can reduce its performance. At AirGreen, we particularly avoid:

• Underestimating the ceiling height: the larger the air volume, the more precise the load calculation must be.
• Installing the unit too close to an obstacle: a beam, bulkhead, light fixture, or partition can hinder air diffusion.
• Neglecting drainage: a poorly planned drain can cause costly damage.
• Choosing the outdoor location solely for appearance: service access, snow, and defrosting must be considered.
• Ignoring building acoustics: some structures transmit vibrations more easily.
• Only comparing initial price: a cheaper but poorly planned installation can cost more in service calls and discomfort.

We prefer to take the time to validate these elements before work begins. This rigor explains why our heat pump installations in Montreal, Laval, Longueuil, North Shore, and South Shore are designed to last, not just to work on the day of commissioning.

Warranty, service, and peace of mind

Your product sheet indicates a 10-year warranty on the compressor, 10-year warranty on parts, and 0-year warranty on labor, with the possibility of an extended warranty. At AirGreen, we clearly explain what is covered, what is not, and what options can be added to better protect the investment.

We also offer a concrete advantage: our refrigeration technicians are familiar with the realities of the Quebec region. A ceiling cassette installed in a commercial establishment in Laval does not pose the same challenges as an installation in a condominium in Longueuil or a project in a renovated house on the North Shore. Our local experience allows us to anticipate constraints before they become problems.

With our $5M civil liability insurance, our RBQ number, our detailed quotes, and our after-sales service, we work with a simple method: offer the right equipment, install it according to industry standards, and remain available after installation.

Who this model is best suited for

The LG 3X3 LGRED | 30,000 BTU Cassette Ceiling Unit is an excellent candidate for customers who want:

• A discreet ceiling heat pump rather than a wall-mounted unit.
• An effective solution for a large open area.
• 30,000 BTU air conditioning with heating suitable for cold climates.
• Air distribution in four directions.
• A device compatible with high-end residential or commercial projects.
• An installation eligible for certain financial aids, depending on current conditions.
• An LG product with R-32, ENERGY STAR® and ENERGY STAR® Cold Climate.

This is not the best choice for all buildings. In some cases, a wall-mounted, ducted, or multi-zone system will be more appropriate. This is precisely why our team takes the time to evaluate the location before recommending a configuration.

Request an AirGreen evaluation for your project

For an HVAC installation in Montreal, Laval, Longueuil, on the North Shore, South Shore, or in Montérégie, the LG 3X3 LGRED 30,000 BTU cassette ceiling unit deserves serious analysis. It combines performance, visual integration, cold climate heating, and comfortable air distribution, provided it is installed with precision.

Contact AirGreen today to get a clear quote, check eligibility for subsidies, compare your options, and plan a professional installation adapted to your building.