Installation of a ForestAir E24 wall-mounted heat pump in Sainte-Justine-de-Newton
AirGreen installs a ForestAir E24 wall-mounted heat pump in Sainte-Justine-de-Newton with an outdoor unit mounted on a rooftop support, providing a durable HVAC solution suited to Quebec’s climate.
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.
A rooftop installation adapted to the realities of a Sainte-Justine-de-Newton residence
In Sainte-Justine-de-Newton, homeowners seek heating and air conditioning solutions that can operate efficiently despite the significant temperature variations typical of rural areas of Quebec. A properly installed wall-mounted heat pump provides consistent comfort year-round while reducing energy consumption when the system is used intelligently.
At AirGreen, we installed a ForestAir E24 wall-mounted heat pump in a particular setting: the outdoor unit was installed on an elevated structure at roof level. This configuration requires different planning than a traditional ground-level outdoor installation, particularly to ensure the unit’s stability, limit vibrations, and protect the equipment from weather conditions.
The photo of this installation shows several important aspects of the work completed. The ForestAir outdoor unit rests on a raised metal support installed above the roofing membrane with suitable support points. This method lifts the unit away from the roof surface, facilitates the drainage of defrost water, and reduces risks associated with snow or ice accumulation during the winter.
The visible environment around the installation also reflects a common reality in certain areas of Montréal, Montérégie, and the surrounding regions: many buildings have limited ground space or architectural configurations that require a customized approach.
For this reason, professional installation of an HVAC heat pump is not simply a matter of choosing a high-performance unit. The positioning of the outdoor unit, vibration management, and accessibility for maintenance are essential factors that affect the system’s lifespan.
A ForestAir E24 heat pump designed for the Quebec climate
A compact system providing heating and cooling
The ForestAir E24 installed in Sainte-Justine-de-Newton is a 12,000 BTU wall-mounted heat pump using inverter technology that allows the compressor to automatically adjust its output according to the residence’s actual needs.
This technology offers several important advantages:
- More stable indoor temperature maintenance;
- Reduced frequent compressor starts and stops;
- Quieter operation;
- Better energy efficiency;
- More even comfort in the served room.
Unlike a traditional wall-mounted air conditioner that operates only during the warm season, a ForestAir E24 wall-mounted heat pump can also provide heating during cold periods.
This versatility explains why many homeowners in Sainte-Justine-de-Newton, Salaberry-de-Valleyfield, Vaudreuil, Châteauguay, Montréal, Laval and Longueuil are choosing this type of system today.
Technical features suited to residential needs
The ForestAir E24 R454B model belongs to a new generation of HVAC equipment using a refrigerant with reduced environmental impact.
The features sought by homeowners include:
- Rated capacity of 12,000 BTU/h;
- Inverter technology;
- Heating and cooling operation;
- Refrigerant R454B;
- Design adapted to North American conditions;
- Compact wall-mounted design.
For an existing residence, this type of unit often represents a worthwhile improvement without requiring the complete installation of a duct network.
A home equipped with electric baseboard heaters, an aging central heating system, or simply a limited air-conditioning system can benefit from better comfort control with a wall-mounted heat pump.
The specific considerations of installing a rooftop heat pump
Why install an outdoor unit on an elevated stand?
In many residential projects, the ideal location for the outdoor unit is not always at ground level.
At this installation in Sainte-Justine-de-Newton, using an elevated stand offers several advantages:
- Protection against snow accumulation;
- Better air circulation around the condenser;
- Reduced risk of blockages during winter;
- Preservation of available outdoor space;
- Easier access for technical service.
However, a rooftop installation requires more precautions than a standard installation.
Technicians must consider:
- the structure's load-bearing capacity;
- possible vibration transmission;
- roof watertightness;
- secure fastening of the support;
- future access for maintenance.
Poor installation could cause vibrations to be transmitted through the building or create water infiltration problems.
Vibration Management and Structural Protection
A heat pump's outdoor unit contains a compressor and a fan that naturally generate some vibrations.
At AirGreen, we pay particular attention to the elements that help reduce these transmissions:
- sturdy supports;
- anti-vibration isolators;
- stable installation;
- adequate distance from sensitive surfaces.
This step is especially important for rooftop, terrace, or balcony installations.
Acoustic comfort is an integral part of a proper HVAC installation. A quiet heat pump must also be installed correctly to preserve its benefits.
The AirGreen installation process for a ForestAir E24 wall-mounted heat pump
Building Preparation and Assessment
Before each installation, our team assesses the project constraints:
- available space for the indoor unit;
- outdoor unit positioning;
- required refrigerant piping length;
- electrical access;
- condensate drainage.
In Sainte-Justine-de-Newton, the main distinguishing feature was the outdoor rooftop installation. This situation required different preparation to ensure a durable installation.
Outdoor Support Installation
The outdoor unit support plays an essential role.
The goal is to keep the unit:
- perfectly level;
- high enough;
- securely fastened;
- accessible for future service.
The photo clearly shows an unobstructed installation above the roof, allowing air to circulate freely around the condenser.
Commissioning and performance testing
After the mechanical installation, several checks are performed:
- Inspection of the refrigerant connections;
- Leak testing;
- Evacuation of the circuit;
- Electrical validation;
- System startup;
- Heating and cooling verification.
These steps confirm that the heat pump is operating according to the parameters specified by the manufacturer.
Mistakes to avoid when choosing a wall-mounted heat pump
Neglecting the outdoor unit’s location
Even an excellent unit can lose efficiency if its installation is poorly planned.
An outdoor unit placed too close to an obstacle may limit:
- airflow;
- defrosting capacity;
- energy efficiency;
- the compressor’s service life.
Choosing a contractor based solely on price
A heat pump represents a long-term investment. A less expensive installation may sometimes conceal compromises:
- inadequate support;
- poor drainage management;
- lack of comprehensive testing;
- incorrect refrigeration installation.
The work of a qualified HVAC contractor directly affects the system’s future performance.
Forgetting annual maintenance
Even a recent heat pump requires regular maintenance.
A professional maintenance service makes it possible to check:
- coil condition;
- component cleanliness;
- fan operation;
- refrigerant parameters;
- drainage.
At AirGreen, we recommend periodic HVAC maintenance to preserve your equipment’s performance and prevent problems before they become costly.
AirGreen: expertise in residential HVAC installation in Quebec
Every installation carried out by AirGreen presents its own challenges. Whether the project is located in Montreal, Laval, Longueuil, on the North Shore, the South Shore, or in a municipality such as Sainte-Justine-de-Newton, our approach remains based on a complete technical analysis.
This ForestAir E24 wall-mounted heat pump installation demonstrates that it is possible to adapt an HVAC solution to a building’s specific constraints, even when the outdoor unit must be installed on a roof.
A good heat pump starts with the right equipment choice, but its performance depends above all on the quality of the installation.
At AirGreen, we focus on professional installation, rigorous commissioning, and a solution adapted to the actual needs of Quebec homeowners.
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).