Installation of an LG Ceiling/Wall Console (indoor unit) in Rosemont–La Petite-Patrie

Intelligent air distribution from the corridor to serve multiple rooms

At AirGreen , we have just installed an LG indoor unit, a ceiling/wall console, in a condo in Rosemont–La Petite-Patrie . Placed high above the doorway of a central hallway, it ensures optimal air distribution to the bedrooms and living room, while freeing up the walls and floor. This installation choice is particularly effective in Montreal plexes, where air circulation between adjoining rooms is as important as aesthetics.

Client background and objectives

The owner wanted to upgrade his HVAC system to gain four-season comfort without losing usable space or increasing the number of units in each room. He wanted:

• Quiet operation for summer nights and winter mornings.

• A discreet and easy-to-maintain solution.

• Even coverage of adjoining rooms thanks to strategic positioning in the corridor.

• Energy-efficient equipment, eligible for financial assistance programs where applicable.

Why an LG ceiling/wall console?

LG ceiling/wall consoles combine the aesthetics of a discreet facade with a sustained blowing capacity. Unlike a classic wall head (horizontal mini-split with visible shutter), the LG console has a large front grille and a fan sized to push the air further , which is ideal for a corridor distributing 2 to 3 rooms. Advantages for an urban condo:

• Long-range diffusion : Conditioned/heated air easily reaches adjacent rooms when doors are ajar.

• Minimal footprint : placed high up, the unit does not interfere with furniture or storage.

• Neat finish : the uniform facade blends into a clean, white decor, very common in Montreal renovations.

• High efficiency ( Inverter technology), promoting energy savings and stable comfort.

Technical details of the installation

Interior layout

• Positioning : Above a door frame in the main hallway. This height facilitates controlled stratification and unobstructed air return .

• Clearances : Strict adherence to LG's recommended side and top clearances for maintenance and ventilation.

• Integration with existing elements : presence of a smoke detector and a ceiling diffuser nearby; we have validated that no air flow from the console disrupts these devices or causes false triggering.

• Noise pollution : fan adjustment and silent mode calibration to ensure low noise levels at night in bedrooms.

Refrigerated and electrical route

• Crossing : clean drilling behind the unit, waterproof sleeve for wall penetration and white interior/exterior capping to protect the refrigerant connections (insulated copper), the communication cable and the condensate drain.

• Estimated length of connections : 5 to 7 meters , typical configuration between an interior corridor and a backyard. This length remains within the recommended optimal ranges, limiting pressure losses and preserving seasonal efficiency .

• Power supply : dedicated circuit with appropriate protection at the panel, in accordance with the Quebec Electrical Code; the maintenance switch is positioned near the exterior outlet.

Condensate management

• Preferred gravity drainage **: constant slope to the outside to avoid a lifting pump (reducing noise and maintenance risks). Addition of a non-return valve to prevent any rise of outside air and parasitic condensation.

Outdoor unit

• Fixing : installation on wall brackets on the courtyard side (option widely used in plex), in order to clear the passage and optimize rear clearances . The anti-vibration pads limit the transmission of vibrations to the masonry.

• Maintenance and snow removal : the height of the brackets protects the condenser from snow accumulations and facilitates winter clearance .

Sizing and performance

• Capacity : 12,000 to 15,000 BTU configuration suitable for a 2-3 room condo when the unit is placed in the heart of the distribution . Sizing takes into account insulation, orientation, glass surfaces and occupancy.

• Inverter technology : fine modulation of the compressor to maintain the setpoint with minimal variations, reducing on/off cycles and the electricity bill.

• Low temperature heating : LG consoles provide efficient additional heat at the beginning and end of the season, relieving the burden on electric baseboards and reducing operating costs .

Specific challenges and AirGreen solutions

1. Narrow corridor and frequent passage
   We positioned the unit above the doorway so as not to encroach on the passageway and maintain an unobstructed airflow . The direct dampers were adjusted to divert the flow to the adjacent rooms and the living room.

2. Compatibility with co-ownership
   Technical file provided: product sheets, diagram of external clearances , method of fixing the brackets and vibration control . This transparency facilitates acceptance by the union.

3. Prevention of nuisances
   Installation of an anti-vibration mat on each bracket support, torque tightening, air flow control in night mode, and optimized refrigeration path to limit whistling .

Results for the client

• Consistent comfort in the bedrooms and living room, even with the doors half-open.

• Lower costs compared to the exclusive use of electric baseboards and portable/house air conditioners.

• Silence and sobriety : the console blends into a white decor and maintains a very soft acoustic profile in the evening.

• Simplified maintenance : front access to filters, screwed capping for quick inspections and easy drain cleaning.

Best practices for setting up in a Montreal plex

• Choose a central corridor to maximize broadcast range.

• Check the slope of the drain over the entire run (at least 1%).

• Respect the exterior clearances : free suction at the rear and blowing not directed towards a neighboring balcony.

• Plan snow removal and defrost water management (winter).

• Document the installation for the co-ownership: plans, anchors, anti-vibration.

Grants and Eligibility

Depending on the configuration and performance ( Energy Star certification, heating capacity in extreme cold ), a wall-mounted/console heat pump may be eligible for certain financial assistance programs in Quebec. Our team assists customers in Montreal, Laval, Longueuil, the North Shore and the South Shore in verifying the criteria , preparing the file and providing proof of compliant installation (photos, detailed invoices, certificate numbers).

Why entrust your project to AirGreen?

• Complete HVAC expertise in dense environments: plexes, condominiums, urban condos.

• RBQ certified teams , proven fixing methods, fine calibration of flow rates and settings.

• After-sales service : periodic maintenance, battery cleaning, leak testing, electrical check.

• Greater Montreal coverage : rapid interventions in Montreal, Laval, Longueuil, North Shore, South Shore , with slots planned according to building constraints.

Recommended maintenance (annual)

• Cleaning the filters and the internal battery.

• Disinfection of the condensate tray and checking the slope of the drain.

• Inspection of external fasteners , anti-vibration pads , and wiring .

• Control of refrigeration load and performance (temperature difference, intensity, pressures).

Conclusion

This LG ceiling/wall console positioned in the heart of the circulation perfectly meets the constraints of Montreal condos: four-season comfort , silence , efficiency , and discretion . Well thought out, the installation from a corridor enhances each BTU produced and facilitates the service of several rooms without multiplying the indoor units. At AirGreen, we design each HVAC installation as a custom project - technical, aesthetic and sustainable - aligned with the realities of the buildings of Greater Montreal.