Installation of a TOSOT wall-mounted heat pump in Plateau-Mont-Royal

An elegant interior design and calibrated comfort for a Montreal condo

At AirGreen , we have just installed a TOSOT wall-mounted heat pump in a condo in Plateau-Mont-Royal . The client's priority: improving temperature stability all year round, limiting drafts in the summer, and reducing the electricity bill without compromising the aesthetics of a refined living space. Our solution: a discreetly designed wall-mounted head, installed at the top of the wall, combined with a clean refrigeration path and reliable condensate management, for uniform comfort in the living room open to the kitchen.

The architectural context and our location choices

Plateau condos often feature modest headroom and molded door frames near the areas where the indoor unit is to be placed. Here, the layout led us to:

• installation in the upper part (under the ceiling), centered on the main wall, in order to exploit the Coanda effect and ensure gentle air circulation along the entire length of the room;

• a minimum distance from the ceiling (compliance with manufacturer clearances) to avoid any air recirculation and keep the noise level as low as possible;

• a connection passage through the wall towards the rear, in line with the right of the unit, for a virtually invisible rendering on the living room side.

The result: a sober integration, perfectly aligned with the interior aesthetics, and a blowing that does not “hit” the occupants, even in cold mode.

Device and functional configuration

• Machine type: TOSOT wall-mounted heat pump (mini-split) – indoor head with multi-position motorized shutter.

• Operating range: four-season heating and air conditioning, inverter modulation to continuously adapt power to actual needs.

• Control: infrared remote control, timer, night mode, automatic restart after power off.

• Air quality: washable filters with front access; a high-density filter can be added for sensitive occupants.

The TOSOT brand stands out for its appreciable fineness of regulation , a neutrally curved front that fits well into modern interiors, and stable electronics, conducive to longevity.

Refrigeration path, electricity and condensate management

We systematically favor a short and direct route to secure seasonal performance:

• Drilling the wall with a slight outward slope (≈ 5–10°) to promote the natural flow of the drain.

• Insulated copper connections (liquid and gas) sized in accordance with the manufacturer's diameters, brazing/flaring checked with torque wrench and suitable rings.

• Communication and power cables grouped under a discreet white cover (capping) on ​​the inside when necessary, then under UV-resistant external conduit .

• Condensates in gravity drain (slope ≥ 1%) towards the outside; a non-return valve is installed to prevent odors from rising and to prevent freezing at the end of the season.

• Electrical protection on a dedicated circuit with external cut-off near the condenser, to facilitate maintenance and power off.

This approach limits pressure losses, reduces noise , simplifies maintenance and maximizes efficiency during peak periods, both summer and winter.

Commissioning: rigor and measures

The quality of a heat pump depends as much on the installation as on the choice of the machine. Our key steps:

1. Nitrogen test : pressure leak test to validate each connection.

2. Deep vacuum (≤ 500 microns) with stabilization, to remove moisture and non-condensables.

3. Opening the fluid and checking the cold/hot blowing temperatures , absorbed intensity , and superheating/subcooling according to the actual length of the lines.

4. Calibration of the shutters and adjustment of the flow rates to avoid dead zones and ensure a uniform thermal gradient in the room.

At the end, we provide the owner with a commissioning report with the control values, useful for monitoring and maintenance.

Perceived and acoustic comfort

A successful interior installation is not limited to performance figures. We also measure perceived comfort :

• Very low noise level in auto speed thanks to modulation;

• Stable setpoint without jolts, even during cloudy periods or when starting household appliances that generate internal heat gains;

• Airflow directed horizontally most of the time, with the flap lowered in turbo mode to quickly reduce heat during heat waves.

The customer thus benefits from gentle cooling in summer and reliable additional heating in spring and autumn, all without any unwanted noise.

HVAC maintenance and sustainability

To maintain performance and air quality:

• Clean filters every 4 to 8 weeks during periods of heavy use;

• Annual inspection by our technicians (gentle washing of the exchanger, checking of tightening, intensity reading, drain check).

• Check for frost and defrosting as winter approaches, especially if the outdoor unit is exposed to prevailing winds.

Regular maintenance prevents overconsumption and extends the lifespan, while protecting the warranty.

Grants and local compliance

Many approved wall-mounted heat pumps may be eligible for assistance programs when their efficiency and low-temperature heating capacity are adequate. We evaluate each application based on the specific model chosen and guide our clients toward relevant programs in Greater Montreal. Our team ensures compliance with RBQ standards , the Canadian Electrical Code , and the requirements of condominium associations (noise levels, clearances, facade aesthetics).

Construction site challenges and solutions implemented

• Space constraint above a decorative frame: we chose a centered installation , with compliant vertical clearance , in order to avoid recirculation of hot/cold air under the ceiling.

• Desired invisible routing : single drilling and connections at the rear of the unit; external trunking matching the facade to minimize visual impact .

• Strictly limited noise pollution : anti-vibration pads outdoors, control of the torque of the fixings and mechanical separation of the conduits to avoid structural transmission.

These measures guarantee discreet operation and careful architectural rendering, two major expectations of the Plateau co-ownerships.

Usage tips to maximize efficiency

1. Auto-inverter mode and stable setpoint (e.g. 23–24°C in summer, 21–22°C in mid-season) to avoid short cycles.

2. Horizontal shutter in hold mode; strong mode only during rapid temperature increases or decreases.

3. Interior doors open to allow air to circulate to adjacent rooms.

4. Sunshades/curtains during heat waves: the device will work less for the same comfort.

5. Annual maintenance : essential to maintain seasonal coefficients and air quality .

Why AirGreen for your installation in Montreal, Laval, Longueuil, North Shore and South Shore?

We combine site engineering and aesthetic requirements : thermal study, BTU sizing adapted to actual volumes, anticipation of structural noise , and support for financial assistance when the model and configuration allow it. Our certified team intervenes quickly throughout Greater Montreal, with a dedicated after-sales service and clear HVAC maintenance contracts .

Conclusion: four-season comfort, discreet and efficient

This TOSOT wall-mounted heat pump transforms the daily life of the condo: cool in the summer , mild in the winter , silent all year round. The controlled installation, the short route , the gravity management of condensates and the methodical commissioning deliver a high-performance and durable installation, faithful to AirGreen standards.