Installation of a ForestAir E24 wall-mounted heat pump in Saint-Lazare
AirGreen carries out the installation of a ForestAir E24 wall-mounted heat pump in Saint-Lazare, featuring a neat outdoor integration, inverter technology, winter heating, and air conditioning suited to Quebec homes.
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.
A ForestAir E24 installation in Saint-Lazare carried out with particular attention to the constraints of a Quebec residence
At AirGreen, every wall-mounted heat pump installation project is assessed according to the building's characteristics, the outdoor environment, and the occupants' comfort needs. This installation carried out in Saint-Lazare, in the Vaudreuil-Soulanges region, is an excellent example of integrating a ForestAir E24 heat pump into an existing residence where optimizing outdoor space and quality workmanship were essential.
The homeowner wanted to add an efficient heating and cooling solution to better control the indoor temperature throughout the year. Selecting a ForestAir E24 met this objective thanks to its inverter technology, its capacity suited to Quebec residences, and its operation designed for the variable climate of Montreal and the surrounding areas.
The outdoor installation highlights several important elements: a unit installed near the foundation wall, a carefully protected line-set passage, a stable base that helps limit vibrations, and an arrangement that maintains adequate access for future maintenance.
A ForestAir E24 wall-mounted heat pump suited to Saint-Lazare's climate
Areas such as Saint-Lazare, Montreal, Laval, Longueuil, the North Shore, and the South Shore experience significant temperature variations between seasons. A wall-mounted heat pump must therefore be chosen not only for its cooling capacity, but also for its heating performance during the colder months.
The ForestAir E24 is a solution that combines energy efficiency with ease of use. Thanks to inverter technology, the compressor automatically adjusts its output to precisely meet the home's needs.
Unlike a conventional system that operates only in on-off mode, an inverter heat pump maintains a more consistent temperature while reducing unnecessary cycles.
Key features of the installed ForestAir E24
This installation includes a 12,000 BTU/h ForestAir E24 wall-mounted heat pump with the following features:
- Variable-speed inverter technology for greater temperature stability;
- Cooling and heating function in a single unit;
- Next-generation R-454B refrigerant with reduced environmental impact;
- ENERGY STAR® certification according to the eligible configuration;
- Capacity suited to residential needs;
- Heating mode designed to operate in Quebec's winter conditions.
For many homeowners, this type of unit represents a significant improvement over older electric heating methods or portable and window air conditioners.
An optimized outdoor installation despite architectural constraints
Installing a wall-mounted heat pump in an existing residence always requires careful planning. In this Saint-Lazare project, the chosen location had to meet several criteria:
- maintain good airflow around the condenser;
- protect the equipment from excessive water or snow accumulation;
- facilitate HVAC maintenance;
- maintain a clean appearance on the exterior façade.
The ForestAir outdoor unit was positioned close to the exterior wall on a stable base. This method avoids an installation directly on the ground, where several problems may arise over time.
Why avoid placing an outdoor unit directly at ground level?
In Quebec, a heat pump installed too low may experience:
- snow accumulation during winter storms;
- freezing caused by defrost water;
- the obstruction of the outdoor fan;
- a reduction in energy efficiency.
A slightly elevated installation improves the drainage of water produced during defrost cycles and helps maintain greater reliability throughout the winter.
Cleanly routed lines to preserve system efficiency
The quality of an HVAC installation also depends on the care taken with invisible details.
For this Saint-Lazare installation, the refrigerant lines, electrical wiring, and condensate drainage were routed neatly to protect the components from the elements.
A professional installation must ensure:
- proper insulation of the refrigerant lines;
- protection against water infiltration;
- an adequate slope for condensate drainage;
- secure fastening of the outdoor components.
These details directly affect the system’s lifespan.
Common mistakes to avoid when installing a wall-mounted heat pump
Many homeowners focus solely on the purchase price of the unit. However, installation quality directly affects performance.
Here are some common mistakes we see in the field of residential HVAC:
Choosing a capacity that is too large
An oversized heat pump may cause:
- short cycles;
- poorer dehumidification in summer;
- unnecessary electricity consumption.
Sizing must take into account the floor area, insulation, sun exposure, and interior layout.
Neglecting the outdoor unit’s location
A poorly positioned outdoor unit may be affected by:
- insufficient space to exhaust hot or cold air;
- debris accumulation;
- excessive exposure to prevailing winds.
The Saint-Lazare installation demonstrates the importance of choosing the right location from the outset.
Forgetting annual maintenance
Even a high-efficiency heat pump requires regular maintenance.
Professional HVAC maintenance makes it possible to check:
- coil cleanliness;
- fan operation;
- the condition of the electrical connections;
- condensate drainage;
- the system’s overall performance.
The benefits of a ForestAir E24 heat pump for Saint-Lazare homeowners
Adding a wall-mounted heat pump provides several practical benefits.
Greater comfort in all four seasons
In summer, the unit acts as an efficient wall-mounted air conditioner to reduce indoor heat.
In winter, it provides supplemental heating, helping reduce the use of other energy sources.
Better management of electricity consumption
Thanks to inverter technology, the heat pump continuously adjusts its output. This prevents repeated starts, which consume more energy.
In many Quebec homes, a properly installed heat pump can help reduce annual heating costs while improving comfort.
An installation eligible for assistance programs under the applicable criteria
Depending on the exact model, the residence, and the programs available at the time of installation, certain ENERGY STAR® heat pumps may qualify for financial assistance or energy rebates.
At AirGreen, we always recommend checking eligibility criteria before finalizing a project so homeowners can take advantage of available programs when they meet the requirements.
AirGreen’s approach to wall-mounted heat pump installations
Every installation completed by AirGreen follows a structured method to ensure lasting performance.
We pay particular attention to:
Pre-installation assessment
Before recommending equipment, we assess:
- the actual heating and cooling needs;
- the ideal location for the indoor and outdoor units;
- electrical constraints;
- the home’s configuration.
Quality workmanship on site
Our teams make sure to:
- install the equipment according to the manufacturer’s recommendations;
- protect existing walls and surfaces;
- perform the necessary tests after commissioning;
- clearly explain how it works to the homeowner.
Post-installation follow-up
A heat pump represents a long-term investment. Proper maintenance and appropriate use help maximize its lifespan.
A ForestAir E24 installation that meets the needs of a residence in Saint-Lazare
This installation of a ForestAir E24 wall-mounted heat pump in Saint-Lazare illustrates the importance of a professional approach to heating, ventilation, and air conditioning (HVAC).
The choice of model, preparation of the outdoor location, protection of the lines, and quality of the finish all contribute to the system’s reliable operation.
At AirGreen, we install HVAC solutions tailored to the realities of homeowners in Saint-Lazare, Montreal, Laval, Longueuil, the North Shore and the South Shore. Our goal is to provide efficient, durable installations suited to Quebec’s climate.
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.
More jobs to see, near you
By town, by equipment or by region: browse more than 4,700 published projects.
Each dot: a town where AirGreen has published projects. The glowing dot: this job.
Every house has its constraints. We see them before we install.
The on-site estimate is free and the quote follows within 24 hours.
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).