Installation of a Goodman wall-mounted air conditioner in Nuns' Island

Context: a bright condo on Île-des-Sœurs, a need for controlled freshness

At AirGreen , we regularly work in co-ownerships on Nuns' Island to modernize or recommission wall-mounted air conditioners . In this project, the existing Goodman indoor head was positioned high up, above a hallway overlooking the kitchen and dining room. The objective was clear: to guarantee uniform cooling , limit noise pollution, secure condensate drainage and ensure clean integration compatible with co-ownership regulations.

Site reading and construction site preparation

Before any action, we carry out a complete check :

• Mechanical condition of the wall head (casing wear, flap clearances, filters, turbine bearings).

• Potential route of refrigeration lines and communication cable , presence of an old drilling, accessibility for maintenance.

• Condensate drainage solution: search for a possible gravity drain; failing that, selection of a compact, soundproof drainage pump .

• Electrical compatibility (dedicated circuit breaker, rating, voltage, routing to the outdoor unit).

• Co-ownership constraints (passage through walls, aesthetics of interior finishing hoods , exterior installation on balcony or facade wall according to regulations).

This preparation avoids surprises, reduces openings to the bare minimum and speeds up the return to service .

Wall-mounted head installation: precision and discretion

The Goodman head is installed high on the wall , a judicious positioning to promote the stratification of fresh air and its natural descent into the living area. We pay particular attention to:

• The fixing template to ensure firm, vibration-free support.

• Perfect alignment to avoid unwanted noise and air leaks at the front plenum.

• The curvature radius of the refrigeration connections to the right of the device, protected by a white cover matching the wall for a discreet appearance.

Result: a sober and silent ensemble, which blends into the interior architecture.

Condensate management: zero drips, zero noise

In co-ownership, gravity draining is not always possible. When required, we select a condensate pump with an integrated tank:

• Reliable level detection and anti-overflow .

• Acoustic treatment to limit startup noise.

• Piping installed with regular slopes and odor traps where required by standards.

This approach avoids any infiltration or marking of the walls , and facilitates annual maintenance.

Wall crossing and refrigerated path

We create a single crossing with the appropriate diameter, with a watertight sheath and vapor barrier . The connections (refrigerator + communication + drain) are grouped in an interior chute with softened angles. Outside, the layout is compact , to limit exposure to the sun and facilitate service access. Each flare is torque checked, the flare nuts are checked, then we proceed to:

• Deep vacuum (microns) until stabilization.

• Leak test.

• Refrigerant charge validated according to the actual length of the lines, in accordance with the manufacturer's specifications.

These steps ensure optimal performance and extend the life of the compressor.

Power supply and compliance

We confirm the presence of a dedicated circuit and appropriate protection (size, circuit breaker, cable type). The connection is carried out properly, with clear markings and compliance with Quebec standards . We favor invisible routes or routes aligned with existing quarter rounds to preserve the aesthetics of the living areas.

Commissioning, balancing and testing

Upon commissioning, our technician:

1. Calibrates the blowing to avoid direct air currents on the dining table and kitchen island.

2. Checks flow rate , blowing temperature , turbine-side static pressure and filter integrity .

3. Set Cooling , Dehumidification and Fan modes with a realistic setpoint for humid days on the river.

4. Educates customer on minimal HVAC maintenance (cleaning filters every 4–6 weeks in summer, microfiber + warm water, no harsh products).

This sequence ensures quiet and economical operation.

Why this configuration works particularly well in a condo

• Air diffusion : the high position promotes temperature homogeneity in the open area.

• Acoustics : the modern, well-fixed wall head limits vibrations on light partitions.

• Aesthetics : white chutes and clean penetrations preserve the clean lines of the condo.

• Service : Direct access to the front sump and filters for easy owner maintenance .

Tips for maximizing comfort and energy bills

• Maintain a constant setpoint (22–24°C in summer) rather than significant variations.

• Use the dehumidification mode during humid episodes for a feeling of freshness at a higher setting .

• Program the ventilation to auto speed to let the electronics adapt the flow to the actual thermal load.

• Clean the filters regularly and schedule annual maintenance by our teams (condensate check, terminal tightening, coil inspection, leak test).

Modernization: When to consider a replacement

Many older Goodman wallheads remain reliable, but replacement may be necessary if:

• The noise level increases, the shutters become loose, or the card has recurring faults.

• Seasonal efficiencies are exceeded by current inverter devices with new generation refrigerant .

• Co-ownership regulations require an aesthetic or acoustic upgrade.

In these cases, we recommend recent wall-mounted heat pumps adapted to Greater Montreal (Montreal, Laval , Longueuil , North Shore , South Shore ) with excellent efficiency and performance in cool weather . Our team offers modern ranges (R-32/R-454B depending on the model) offering four-season comfort , controlled consumption and simplified maintenance .

HVAC Maintenance: What We Do During an Annual Visit

• Cleaning the filters , turbine and condensate tray.

• Gentle disinfection of the evaporator coil to limit odors and biofilm.

• Test the condensate pump (if present), purge and check the pipes.

• Checking the tightening torques of the connections and visual inspection of tightness.

• Measurement of inlet/outlet temperatures and adjustment of parameters if necessary.

Annual maintenance means fewer breakdowns, better air quality and more stable bills .

What our customers appreciate about AirGreen

• Neat and compliant HVAC installations in co-ownership.

• Administrative support (management regulations, work permits).

• Realistic deadlines and clear communication from start to finish.

• Accessible after-sales service , with practical advice and planned maintenance visits.

Need help with your condo on Nuns' Island or elsewhere in Greater Montreal?

Whether you want to optimize your current Goodman wall-mounted air conditioner , repair a recurring problem, or replace it with a newer generation, we will support you from the technical study to commissioning . Our teams cover Montreal , Laval , Longueuil , as well as the North Shore and the South Shore , with slots adapted to condominiums.

Frequently Asked Questions — Condominiums and Wall-Mounted Air Conditioners

Can old refrigeration lines be reused?
We assess the condition, diameter , length and internal cleanliness . If the conditions are not met, we replace the lines to ensure performance and reliability.

Is a condensate pump mandatory in a condo?
Not always. When a gravity drain is impossible or non-compliant, the pump becomes the clean and discreet solution.

How long does the procedure last?
A simple condo modernization is generally carried out within the day , including testing and end-of-construction cleaning.

Is an annual maintenance required?
Yes. HVAC maintenance extends the lifespan, keeps the unit quiet , and reduces consumption.

By choosing AirGreen, you are opting for a local partner who understands the realities of co-ownerships on Île-des-Sœurs and Greater Montreal , and who delivers clean , efficient and long-lasting installations.

Areas served

We operate in Montreal (including Île-des-Sœurs, Verdun, Ville-Marie, Le Sud-Ouest), Laval , Longueuil , as well as on the North Shore and the South Shore for your wall-mounted air conditioners and wall-mounted heat pumps .