Installation of a Goodman wall-mounted heat pump in Villeray

A discreet interior head above a passage: optimized comfort and smooth circulation in an apartment in Villeray

Customer context: targeted air conditioning and low-energy supplementary heating

At AirGreen , we were approached by a couple living in Villeray who wanted to improve the comfort of a typical Montreal home: adjoining rooms, a central hallway, and closely spaced doors. Their priority was twofold: uniform cooling for July's heat waves and reliable supplemental heating during the off-season, without encroaching on the living space. The layout of the home naturally led us toward a single-zone wall-mounted heat pump , with an interior head placed above a passageway to efficiently sweep the hallway and reach the adjoining bedroom.

Equipment choice: Goodman wall-mounted, rated at 12,000 BTU

After taking measurements and quickly calculating the loads (exposure, insulation, glazing, infiltrations), we selected a Goodman unit in a single-zone configuration, 12,000 BTU . This sizing covers the main living area without oversizing, limits on/off cycles and allows fine modulation of the power.

Why a Goodman wall-mounted heat pump for Villeray?

• Inverter modulation : better temperature stability and reduced consumption .

• Silent operation of the interior head, essential in an apartment.

• Integrated air filtration and treatment, beneficial for air quality.

• Reliability and availability of parts through our local service network.

Installation: a transom installation that frees up space

The main constraint of the site lies in the proximity of the ceiling and the frames . We position the head in the transom , at the axis of the corridor, just above a door, in order to:

• completely free the walls of furniture;

• promote a sweep of air which progresses in the corridor then diffuses towards the room;

• maintain clearances in accordance with the device's blowing template.

The wall support is anchored in a load-bearing area with verification of the facing. We take care to ensure the plumb and level to guarantee gravity-based condensate flow without stagnation.

Refrigeration path and condensate management

The corridor opens onto an exterior wall: we opt for a short through-hole , with a downward slope towards the outside, sheathed with a waterproof sleeve. The insulated copper connections and the communication cable exit directly behind the fixing plate; the drain is laid with a continuous slope. This approach reduces:

• the total length of the connections (less pressure losses);

• the number of elbows (better fluid circulation);

• the probability of flow noise at startup.

Externally, the connections are protected by a UV cover and fixed to the masonry with stainless steel clamps. The power supply connects to a regulatory remote disconnect box, which simplifies HVAC maintenance and future shutdown for maintenance.

AirGreen execution details: rigor and traceability

Our installation protocol includes:

• Flares calibrated according to the prescribed torque, then tightened with a torque wrench ;

• Nitrogen pressurization and leak testing;

• Vacuum draw to a deep, stabilized vacuum , followed by a hold test;

• Electrical checks (polarity, grounding, currents);

• Commissioning with reading of temperatures, superheat and subcooling ;

• Setting the shutters and sweeping test to avoid any direct blowing on the occupants.

Each step is documented and archived in the customer file, useful for the warranty and our maintenance visits.

Daily comfort: what the customer feels

As soon as it is switched on, the temperature stabilizes quickly. The transom position:

• desaturates the hot air accumulated in the ceiling and redistributes it;

• creates a flow of air that crosses the corridor and then slides into the next room;

• reduces the perception of direct air current thanks to vertical sweeping .

In supplemental heating mode, modulation maintains gentle, continuous heat, ideal for fall and spring when the main system would be oversized for small demands.

Finishing and aesthetic integration

In Montreal apartments, the challenge isn't just technical: it's aesthetic. We take care of:

• the alignment of the head with the frame;

• the discreet peripheral joint between hull and wall;

• the continuity of the interior and exterior hoods.

Result: a sober and discreet unit, designed to last and easy to dust.

Safety and maintenance: thought through from the design stage

• External disconnection accessible for interventions;

• Clearances respected around the outdoor unit (not visible here, but provided for in the quote) for optimal heat exchange;

• Constant slope drain tested with water before closing;

• Easy access to the pre-filter and exchanger for annual maintenance.

Recommended HVAC maintenance

To maintain performance and air quality :

1. Clean filters every 4 to 8 weeks during the usage season.

2. Once a year, schedule HVAC maintenance : deep dusting, electrical check, coil inspection, drain flow test.

3. Clear the outdoor unit (leaves, snow) and avoid any obstruction of the discharges .

4. After very cold weather, check that there is no ice near the defrost water outlets.

These actions reduce consumption, protect the compressor and extend the life of the installation.

Best Practices for a Head Over a Door

Installing an interior transom header requires specific precautions:

• Minimum height above the woodwork so that the shutter opens without friction;

• Side clearances retained for suction;

• Drain slope confirmed despite lintel;

• Drilling away from weak corners of the wall to avoid cracks and resonances;

• Dust-proof sealing around the passage of connections to prevent odors from rising.

Applied, these rules guarantee silence , durability and performance .

Grants and Eligibility

High-performance wall-mounted heat pumps may be eligible for financial assistance programs in Quebec. Eligibility depends on seasonal performance and cold weather operating ranges . We support our customers in Montreal , Laval , Longueuil , as well as the North and South Shores to verify the criteria, prepare the file , and submit the application when the chosen unit meets the requirements.

Pitfalls to avoid (AirGreen feedback)

• Undersizing in south-facing through-dwellings: a precise calculation is better than approximations.

• Drilling too high which levels the drain: risk of seepage into the corridor.

• Interior cover missing or poorly finished: accumulation of dust and aesthetic losses.

• Outdoor unit confined in a narrow courtyard: air recirculation, reduced efficiency and increased noise.

• Absence of vapor barrier at the passage of connections: temperature gradients can generate condensation.

What we bring to Villeray and Greater Montreal

Beyond the device, our value lies in the design of the route , the quality of the assemblies and the instrumented commissioning . We operate throughout Greater Montreal with the same requirement: study, careful HVAC installation , then scheduled HVAC maintenance to maintain performance throughout the winters.

Technical summary of the construction site

• Type : single-zone wall-mounted heat pump

• Brand : Goodman

• Capacity : 12,000 BTU (sized for living area)

• Interior installation : in transom above a door , clearances respected

• Route : short drilling with slope, insulated copper connections, gravity drain

• Power supply : external disconnection, grounding checked

• Objectives : uniform air conditioning in summer, economical additional heating in mid-seasons

Need an installation that is both discreet and effective?

We analyze your home, size the heat pump as accurately as possible and carry out a high-quality installation that respects your interior architecture. In Villeray , Montreal , Laval , Longueuil , on the North Shore or the South Shore , our AirGreen team supports you from selection to maintenance, for lasting comfort all year round.