LG: Cassette type 3x3 ceiling mounted air conditioner | 30,000 BTU
SEER2 (Seasonal Air Conditioning Efficiency)
HSPF2 (Seasonal heating efficiency)
EER2 (Instantaneous efficiency in air conditioning)
COP at -8 °C (Heating energy efficiency)
CFM (Airflow)
An LG Ceiling Cassette Designed for Large Spaces Where Comfort Must Remain Discreet
The LG 3x3 Ceiling Cassette | 30,000 BTU is intended for homeowners, building managers, and businesses who want to heat and cool an open space without installing a visible wall-mounted unit. In many HVAC projects in Montreal, Laval, Longueuil, North Shore, and South Shore, this type of cassette becomes relevant when walls are occupied by display cases, storage, doors, wall art, workstations, or commercial equipment.
At AirGreen, we recommend this model for spaces where air needs to be distributed uniformly: open-plan offices, retail stores, showrooms, common areas of condominiums, restaurants, clinics, professional salons, and large residential rooms with suspended ceilings. The 3x3 cassette integrates into the ceiling and diffuses air on four sides, preventing air from being concentrated in a single direction.
This LG model, associated with the indoor unit KNSCB301A and the outdoor unit KUSXB301A, belongs to the KSSCB301A R32 Single Zone 3x3 Four-Way Ceiling Cassette series. According to the LG technical sheet, it offers a modulating cooling capacity of 12,000 to 35,000 BTU/h, with a nominal capacity of 30,000 BTU/h, as well as a modulating heating capacity of 14,000 to 37,000 BTU/h. It uses R-32 refrigerant, includes a variable-speed Inverter compressor, an integrated condensate pump, an R-32 leak detection sensor, and a quiet turbo fan.
A Technical Profile Well-Suited to the Quebec Climate
The first thing to remember about this LG 30,000 BTU cassette heat pump is that it does not operate like a fixed-capacity unit. Its Inverter compressor adjusts output according to the actual heating or cooling demand. This modulation helps avoid abrupt starts and overly short cycles, two common problems in improperly sized installations.
Key data for projects in Quebec are as follows:
- Models: indoor unit KNSCB301A, outdoor unit KUSXB301A
- Nominal Class: 30,000 BTU
- Cooling Capacity: 12,000 to 35,000 BTU/h
- Heating Capacity: 14,000 to 37,000 BTU/h
- SEER2: 21.0
- EER2: 12.10
- HSPF2: 10.0
- Refrigerant: R-32
- Dehumidification: 5.4 pints/hour
- Indoor Airflow: 840 / 755 / 670 CFM depending on speed
- Indoor Sound Level: approximately 40 to 42 dB(A)
- Outdoor Sound Level: approximately 52 dB(A) in cooling and 54 dB(A) in heating
- Power Supply: 208-230 V / 60 Hz / 1 phase
- MCA: 19.1 A
- MOP: 30 A
- Piping: 3/8 inch liquid, 5/8 inch vapor
- Maximum Equivalent Pipe Length: 164 ft
- Maximum Elevation Difference: 98.4 ft
- Displayed Warranty: 10 years compressor, 10 years parts, 0 years labor, with possible extended warranty
For buildings in the greater Montreal area, this combination is interesting because it allows for an HVAC installation capable of meeting variable needs: heavy solar load in summer, exposed commercial display cases, high ceilings, fluctuating occupancy, heat generated by lighting or electronic devices, and then a need for stable heating during cold periods.
Low-Temperature Heating and LogisVert Eligibility
The product is listed as ENERGY STAR® and ENERGY STAR® Cold Climate, with ENERGY STAR ID 3544255 and AHRI 214825956. For an eligible residential owner, this can directly impact the amount of the provincial LogisVert subsidy.
Hydro-Québec indicates that the LogisVert financial assistance for an eligible heat pump is calculated according to its capacity at -8 °C, with a distinct rate for ENERGY STAR® certified models and cold climate models; the amount also depends on the installation date. The amount displayed on our product sheet, $2,520, must therefore be validated according to the project's eligibility, current rules, and required documents at the time of installation.
In practice, we pay particular attention to three elements before confirming financial aid:
- The building in question: residence, condo, plex, commercial space, or mixed-use.
- The exact model installed: correspondence between KNSCB301A, KUSXB301A, AHRI, and ENERGY STAR numbers.
- The date and context of installation: replacement, addition, existing configuration, and program requirements.
This verification avoids unpleasant surprises. A heat pump may perform well on paper, but a poorly documented subsidy application can delay the process or complicate reimbursement.
Why a 3x3 Cassette Rather Than a Wall-Mounted Unit
A wall-mounted unit remains an excellent choice for a bedroom, a standard apartment, or an enclosed room. The 3x3 ceiling cassette, however, addresses a different reality. It is designed for spaces where the wall is not the best place to blow air.
In a retail store on the South Shore, for example, a wall-mounted unit installed above a display case can create an unpleasant airflow for customers near the entrance, while leaving the back of the premises less comfortable. A central cassette, well-placed in the ceiling, distributes air to several zones at once. In an open-plan office in Laval, the same principle helps reduce complaints about workstations that are too cold or too hot.
Four-way diffusion helps to:
- better distribute air conditioning in large open areas;
- limit direct drafts on occupants;
- preserve the appearance of walls;
- keep display cases, shelves, and partitions clear;
- improve comfort in spaces with suspended ceilings;
- reduce temperature differences between the front and back of a room.
The Swirl Wind and Jet Cool functions are particularly useful when the space needs to recover quickly after a heat peak: arrival of customers, frequently open exterior door, light cooking, computer equipment, or strong sunlight.
An Installation Requiring Real HVAC Planning
A ceiling cassette is not a unit to be installed quickly without analyzing the building. Its main advantage — integration into the ceiling — also requires a complete verification of the structure, clearance, drainage, and service access.
Manufacturer diagrams show a square 3x3 indoor unit, with a panel of approximately 37 3/8 inches and a ceiling opening to be planned around the cassette. The technical sheet also illustrates suspension points, drainage connection, piping inlet, electrical box, and necessary clearances. These details are essential to avoid an installation that hinders future maintenance.
At AirGreen, our method generally includes:
Ceiling Evaluation
We verify the ceiling type: gypsum, suspended ceiling, commercial structure, concrete slab, technical plenum, or architectural ceiling. A 3x3 cassette requires sufficient clearance for the indoor unit, condensate pump, refrigeration connections, and maintenance access.
Heat Load Calculation
Choosing a 30,000 BTU unit should never be based solely on surface area. We take into account insulation, orientation, windows, number of occupants, heat-generating appliances, ceiling height, and the actual use of the space. In some businesses in Montreal, a relatively modest area may require a higher capacity due to display cases and foot traffic. Conversely, a better insulated space in Boucherville or on the North Shore may require a more nuanced approach.
Condensate Management
The integrated condensate pump is an asset, but it does not replace good drainage planning. We validate the slope, drain path, discharge point, freezing risk, and access for cleaning. Poor condensate management can cause leaks, ceiling stains, or safety shutdowns.
Piping Route and Outdoor Unit Position
The piping for this model uses 3/8 inch and 5/8 inch diameters. The maximum equivalent length of 164 ft offers good flexibility, but every foot of refrigerant line influences performance, refrigerant addition, and installation complexity. We avoid unnecessary routes, excessive bends, and outdoor locations poorly protected against snow, ice, or prevailing winds.
Compliant Electrical Supply
With a 208-230 V supply, an MCA of 19.1 A, and an MOP of 30 A, the connection must be properly planned. We coordinate work with applicable electrical requirements so that the installation complies with standards and allows for reliable operation.
R-32, Efficiency, and Long-Term Maintenance
R-32 is a new generation refrigerant used in several recent HVAC systems. For the client, the important thing is to understand that its installation must be carried out by trained refrigeration technicians, with proper handling practices, sealing, vacuuming, and charge verification. The integrated R-32 leak detection sensor adds a layer of safety, but it does not replace rigorous installation.
Regular maintenance helps maintain the cassette's performance:
- filter cleaning;
- grille inspection;
- drain and condensate pump verification;
- heat exchanger cleaning;
- airflow validation;
- electrical connection inspection;
- operating pressure and temperature verification;
- outdoor unit check before the cold season.
In our HVAC maintenance service calls, we often find that problems do not come from the product itself, but from neglected maintenance access, a poorly cleaned drain, or a forgotten filter. A ceiling cassette installed in a busy commercial space needs to be maintained more often than a residential unit used a few hours a day.
An AirGreen Solution for Residential, Commercial, and Multi-Dwelling Projects
The LG 3x3 Ceiling Cassette | 30,000 BTU is particularly relevant when comfort needs to be constant, but the equipment must remain discreet. We often integrate it into scenarios where aesthetics, airflow, and reliability are as important as raw capacity.
Examples of Scenarios Encountered in the Field
In a commercial space in Longueuil, the main problem might be the temperature difference between the glazed facade and the back of the store. A wall-mounted unit placed at the front would have blown directly onto the customer area without properly treating the back. A 3x3 cassette centered in the space allows for more balanced distribution.
In a professional office in Laval, the constraint might come from glass partitions and workstations. Occupants sitting near a wall-mounted unit often complain of too direct airflow. The ceiling cassette reduces this problem by distributing air on multiple sides.
In a residential open area in Montreal, especially in a condo with a partial suspended ceiling or in a high-end renovation project, the cassette can offer a more discreet finish than a wall-mounted unit. It then becomes a well-integrated air conditioning and heating solution, without major compromise on appearance.
On the North Shore and South Shore, we also see this type of unit in common rooms, small private gyms, training areas, waiting rooms, and reception areas. In these places, comfort should not depend on a single air jet directed at an opposite wall.
Mistakes to avoid before purchase
A ceiling cassette is an excellent product when chosen correctly. However, the following mistakes can negatively impact the final result:
Choosing solely based on BTU count
A 30,000 BTU unit can be too high, too low, or perfectly suitable depending on the building. The right choice relies on a complete thermal analysis, not just on the area.
Forgetting service access
A cassette installed too close to an obstruction or without an access panel makes maintenance longer and more expensive. We always plan access to filters, drains, electrical boxes, and connections.
Underestimating drainage
The presence of an integrated pump does not guarantee perfect drainage. The drain path must be clean, accessible, and compliant with building constraints.
Assuming Wi-Fi is included
Wi-Fi control is optional with the compatible module. For some clients, a simple controller is sufficient. For others, particularly businesses or multi-unit dwellings, centralized control may be more appropriate.
Neglecting the outdoor unit in winter
In Montreal and the surrounding areas, the outdoor unit must be placed to limit snow accumulation, facilitate defrosting, respect clearances, and allow for maintenance. Depending on the site, accessories such as a drain pan heater or wind protection may be considered.
Control options and useful accessories
The model includes a PWLSSB21H wireless remote control. The PT-AAGW0 grille is required. Depending on the project, several options may be relevant:
- PWFMDD200 Wi-Fi module;
- LG wall-mounted controllers;
- remote temperature sensors;
- dry contacts for integration into certain systems;
- centralized controllers for commercial buildings;
- premium panel with air purification kit;
- drain pan heater for certain outdoor installations;
- protection for low-temperature operation depending on usage.
Not all these accessories are necessary. Our role is to select what brings true value to the project, without adding unnecessary components.
Why choose AirGreen for this LG installation
A 3x3 cassette requires precise installation. At AirGreen, we combine the expertise of our refrigeration technicians, a clear analysis of the building, and a detailed quote before work begins. Our clients know exactly what is included: unit, required accessories, labor, piping, drainage, necessary electricity, outdoor support, warranty, and available options.
We regularly perform HVAC installations in Montreal, Laval, Longueuil, North Shore, South Shore, and Montérégie. Our team works on residential, commercial, and multi-unit projects. We hold RBQ license # 5645-9605-01 and have liability insurance of $5,000,000, two important elements when it comes to opening a ceiling, working with refrigerant, and coordinating installation with the constraints of an occupied building.
Our approach is simple: recommend the right unit, install it properly, verify its operation, and remain available for maintenance or after-sales service. A well-installed heat pump should provide comfort, but also reduce unnecessary interventions.
A serious choice for stable comfort and careful integration
The LG 3x3 Cassette Type Ceiling Unit | 30,000 BTU is not a unit for improvised installations. It is intended for projects where a discrete, efficient solution compatible with cold climate heating and well-integrated into the interior architecture is desired. Its modulating capacity, R-32 refrigerant, ENERGY STAR® Cold Climate certification, low indoor sound level, and four-way air distribution make it a solid option for many buildings in Greater Montreal.
To get a quote, confirm eligibility for the LogisVert grant, compare this model with a wall-mounted unit, or plan a complete HVAC installation, contact AirGreen. We will help you confirm if this LG cassette is the right choice for your space, your budget, and your comfort goals.