Installation of a Hitachi wall-mounted heat pump in Laval-des-Rapides
AirGreen replaced a Hitachi wall-mounted heat pump in Laval-des-Rapides. An HVAC system optimized to ensure comfort, energy savings, and subsidies in Greater Montreal.
Take a tour of the installation
Each number is a point we check on site. Switch between summer and winter to watch air and heat move.
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.
Modernization of a residential HVAC system in Laval-des-Rapides
At AirGreen , we were commissioned to replace an old Hitachi wall-mounted heat pump in a condo in Laval-des-Rapides . The client wanted to maintain the reliability of their unit while improving the energy efficiency of their home, and we handled every step of the project, from the initial assessment to commissioning.
The context of the installation
The existing equipment was already several years old. Although it was still functioning, its performance was no longer optimal:
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Increased electricity consumption.
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Temperature fluctuations in the living room and bedroom.
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More noise due to fan wear.
Rather than waiting for a complete breakdown, the owner chose to act proactively to ensure stable comfort all year round .
Technical details and AirGreen approach
Our team proceeded to dismantle the existing wall unit, taking care to preserve the wall surfaces and moldings. For the new installation:
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Strategic positioning at height , allowing optimal diffusion of air in the living room.
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Partial reuse of refrigerant pipes , after inspection and replacement of non-compliant sections.
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Gravity condensate drain maintained, limiting the risks of breakdown associated with mechanical pumps.
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Careful sealing to prevent any infiltration of outside air.
We also adjusted the piping length to meet the manufacturer's recommendations, ensuring adequate refrigeration pressure and maximum energy efficiency.
Constraints encountered and solutions implemented
One of the main constraints was the proximity of the ceiling and decorative moldings. Our technicians had to adapt the wall brackets so that the device would fit perfectly without altering the aesthetics of the room. The end result offers precise and discreet alignment , with an impeccable finish.
Benefits for the customer
By choosing a new Hitachi wall-mounted heat pump , the customer now benefits from:
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Four-season comfort , with efficient heating in winter and effective air conditioning in summer.
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Significant energy savings thanks to higher efficiency and better consumption management.
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A quieter environment , with a much quieter device than the old model.
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Peace of mind linked to the guarantees offered and AirGreen monitoring.
AirGreen: HVAC expertise serving residents of Laval and Greater Montreal
This installation illustrates our ability to manage residential projects while taking into account architectural constraints, energy needs and the comfort sought by our clients. Whether you are in Montreal, Laval, Longueuil, on the North Shore or the South Shore , our team provides a turnkey service:
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Precise analysis of needs.
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Selecting the right heat pump model.
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Installation complies with RBQ standards.
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Complete support for obtaining available subsidies (LogisVert, Greener Homes, etc.).
Why entrust your HVAC installation to AirGreen?
Our services go far beyond mechanical installation. We offer sustainable solutions, adapted to Quebec's climate and our clients' expectations. With AirGreen, each project is an opportunity to combine technical expertise, energy savings, and sustainable residential comfort .
The big day, step by step
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.
What would it look like 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.
Four mistakes we do not make
Flip each card to see what we do instead.
Your own project, step by step
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.
Is your home ready?
Check what applies at your place. A "no" is not a refusal: it is what we sort out during the estimate.
Four statements: true or false?
It all comes down to details you have just seen.
1. In heating mode, the outdoor unit can produce water.
During defrost cycles. That water must drain away without forming ice.
2. You pick the capacity with a simple square-footage rule.
Windows, insulation, orientation and how the room is used all count. Capacity is chosen on site.
3. A multi-zone connects several indoor heads to a single condenser.
One head per room, all on the same condenser. Each room keeps its own temperature.
4. The disconnect can sit behind the patio furniture.
It must stay accessible: it is what shuts the unit off for service.
0 / 4 right answers
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?
No question matches. Write to us: we answer.
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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).