Installation of a Goodman wall-mounted heat pump in Le Sud-Ouest (Montreal)
AirGreen installs a Goodman wall-mounted heat pump in Montreal (Le Sud-Ouest) : a compact solution for high ceilings and industrial doors, controlled airflow, integrated condensate pump and optimized HVAC maintenance for four-season comfort.
In summer, the outdoor unit rejects the house's heat outside.
Generic illustration of this type of installation, not a survey of this job site. Tap a number.
Mounted level on a wall plate, high enough for the air to reach the whole room, with enough space around it to slide the filters out easily.
The refrigerant lines, the communication cable and the drain go through the wall in a single opening, sealed against water, cold air and insects.
Two insulated copper pipes connect the two units. Outside, a line cover can protect them from sun, knocks and weather.
A shut-off switch near the outdoor unit isolates it safely for service. It must stay accessible at all times.
The compressor and the fan. In heating mode it captures heat from the outdoor air, even in winter, and moves it inside.
On the ground or on the wall, it keeps the unit above accumulated snow. The unit stays clear and defrost water can drain away.
The fan needs to blow freely. Storage, a fence or a wall too close, and efficiency drops while noise goes up.
Targeted comfort for a room with a high ceiling and industrial door
At AirGreen , we often work in hybrid spaces—workshops, neighborhood cafes, creative studios—where the main requirement is to achieve precise, quiet, and reliable heating and cooling despite architectural constraints. This HVAC installation in Le Sud-Ouest (Montreal) is a good example: a Goodman wall-mounted heat pump installed high above an industrial opening to stabilize the comfort of a high-traffic space.
Why a wall-mounted heat pump in a workshop-type space?
In this room, the free height, the presence of a mechanical rail, a drive chain and metal ducts require a compact device, quickly modulating its power and capable of directing the air precisely. The wall-mounted heat pump meets this need exactly:
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Inverter modulation to follow demand in real time;
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adjustable air diffusion with horizontal and vertical flaps;
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installation possible near the ceiling without encroaching on the usable surface;
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low electricity consumption all year round, with an excellent comfort/savings ratio.
Goodman was chosen for its robustness and its parts readily available in Quebec, a real plus for the continuity of operation of a local business.
Context, constraints and implementation strategy
The indoor unit is mounted above a large opening (sectional door) near mechanical components: chain, rail, exposed electrical wiring, and metal conduits. Our priorities during the technical inspection:
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Safety and clearances
We validate the required clearances on the facade and sides to avoid any interference with the shutters, and we take into account the trajectory of the chain and the movement of the door. The anchors are positioned in a reinforced structure , with silent blocks to limit vibration transmission to the walls. -
Condensate hydraulics
At this height, gravity drainage is rarely possible. We integrate a mini-condensate pump with double float detection, sheathed and soundproofed, with a service line accessible for maintenance. The discharge follows a protected route in a technical chute painted in black , in order to blend into the industrial decor. -
Refrigerant path and wiring
Refrigerant lines are run a short distance to the outside to limit pressure losses. Bends are made to a minimum radius and each connection is nitrogen brazed . The communication cable and power supply are physically separated from the door power cables to avoid interference. -
Breath management near an opening
The needs are contradictory: to cut off air infiltration during frequent openings without blowing directly onto users. We calibrate the direction of the shutters to create a light air curtain over the passageway while promoting sufficient recovery in the upper part.
Execution Details: What Makes the AirGreen Difference
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Clean drilling with bulkhead and waterproof interior/exterior finish.
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Deep vacuum (< 500 microns) and test to ensure a dry, leak-free circuit.
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Refrigerant charge checked according to actual line length, with compensation if required by the manufacturer.
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Measurement of hot and cold parameters : intensity, superheating/subcooling, ΔT in blowing, in order to validate seasonal performance.
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Remote control programming : temperature ranges, dehumidification mode for Montreal summers, setpoint locking to prevent deviations in a multi-user environment.
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Aesthetic finish : trunking and fasteners in harmony with the dark decor, clean passage along the mechanical elements, logical and serviceable routing.
Result: stable comfort, contained noise, controlled costs
From the start of service, we observe:
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a uniform temperature throughout the volume, despite variations due to door openings;
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a very discreet noise level near workstations and the counter;
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appreciable responsiveness during load changes (arrival of customers, light cooking, sun on the facade);
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energy savings linked to inverter modulation and automatic shutdown outside of occupied hours.
For this type of premises, the heat pump is used all year round: supplementary heating in winter, air conditioning and dehumidification in summer, which also protects materials and equipment.
Best practices and points of vigilance in light industrial spaces
Our teams share here some recommendations from the field:
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Height and obstacles : always check the trajectory of moving elements (chains, arms, rails) and provide a protective screen if the environment is changing.
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Condensates : use a pump with a transparent tank and a disconnect for quick maintenance; provide an overflow alarm or safety cut-off.
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Electricity : dedicated power supply with identified circuit breaker , wiring away from friction zones and high current lines.
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Filtration : If the activity generates dust or grease, add a washable pre-filter and schedule more frequent HVAC maintenance .
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Blowing : In high-ceilinged spaces, use an automatic speed and an air blade directed towards occupied areas to avoid stratification.
HVAC Maintenance: Ensuring Durability and Performance
We offer an annual HVAC maintenance plan tailored to small businesses:
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cleaning of filters and exchanger, checking of condensate pump;
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checking electrical connections , tightening and insulation;
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control of refrigeration parameters in operation;
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inspection of chutes and discharge slope ;
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update of instructions according to seasonal occupancy.
Regular maintenance maintains performance, extends the life of the device and prevents unplanned shutdowns.
About Grants
Wall-mounted heat pumps may be eligible for assistance when they meet efficiency and cold weather performance criteria. For residential use , programs in Quebec are well established; for commercial premises , eligibility depends on the nature of the activity and the building. We recommend a case-by-case verification : our team assists clients in preparing files.
AirGreen in Greater Montreal: expertise, responsiveness, quality
Whether you are in Montreal , Laval , Longueuil , on the North Shore or the South Shore , our team understands the constraints of Montreal buildings: old bricks, lofts, modernized workshops, plexes and condos. We size the heat pump based on the actual thermal load (insulation, infiltration, exposure), then we plan an installation that respects your activity and limits service interruptions.
AirGreen – Heat Pumps, Air Conditioning & Heating
A single point of contact for study , installation , commissioning and maintenance . Your comfort has no seasons.
How it goes, from the first call to the end
The main steps of this kind of job at AirGreen. Every house has its quirks: the estimate brings them out.
We look at the room, the outside wall, the line route and where the outdoor unit will go. That is where the capacity gets chosen.
Model, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
Floors and furniture protected, wall plate position marked level, wall opening located.
A single opening, with the slope the drain needs to flow outside.
Set on a stand raised above the snow, with the clearances the manufacturer requires.
Connected, insulated and protected. The opening is then sealed against water, cold air and insects.
A dedicated circuit and an accessible disconnect near the outdoor unit.
Leak test, vacuum, then start-up and a check of heating and cooling.
Remote, modes, filters: we show you the essentials before we leave.
- The on-site estimateWe look at the room, the outside wall, the line route and where the outdoor unit will go. That is where the capacity gets chosen.
- The quoteModel, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
- Getting readyFloors and furniture protected, wall plate position marked level, wall opening located.
- The wall openingA single opening, with the slope the drain needs to flow outside.
- The outdoor unitSet on a stand raised above the snow, with the clearances the manufacturer requires.
- Lines, cable and drainConnected, insulated and protected. The opening is then sealed against water, cold air and insects.
- The electrical workA dedicated circuit and an accessible disconnect near the outdoor unit.
- Tests and start-upLeak test, vacuum, then start-up and a check of heating and cooling.
- The walkthroughRemote, modes, filters: we show you the essentials before we leave.
And at your place?
Two quick checks with real numbers: what heat costs, and what your current heaters add up to in BTU/h.
Conversion: 1 W = 3.412 BTU/h. An indication, not a load calculation: baseboards and furnaces are often stronger than the real need, and they can stay as backup. AirGreen confirms the capacity on site.
What to do, season by season
Three habits per season for this unit. They take a few minutes and prevent many calls.
- Clean the indoor unit's filters.
- Clear leaves and debris left on the outdoor unit by winter.
- Test cooling before the first hot days.
- Clean the filters more often when the unit runs a lot.
- Keep plants away from the outdoor unit.
- Check that no water drips from the indoor unit.
- Rake the leaves around the outdoor unit.
- Test heating before the first cold days.
- Book periodic maintenance before winter.
- Keep snow away from the stand and the front of the unit.
- Let the unit defrost: it is normal.
- Never hit the ice on the fins; call us if the unit stays iced up.
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What people ask us about this kind of work
Does a wall-mounted heat pump heat in winter?
Wall-mounted or multi-zone: how do I choose?
Where does the outdoor unit go?
Are there grants?
Do I need a permit?
How cold can it heat?
How much can I save?
How is the LogisVert assistance calculated?
Is it noisy?
The outdoor unit is covered in ice: is that normal?
Does AirGreen hold the required licences?
Is the estimate free?
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Text and photo: a real AirGreen Climatisation & Chauffage job. The diagrams are generic illustrations of the type of installation, not a survey of this job site. Sources of the added figures: airgreen.ca product pages (NEEP / AHRI performance), Hydro-Québec (Heat pumps page, LogisVert, read on 13 October 2026), Régie de l’énergie (rate D as of 1 April 2026).