Installation of a Lennox central heat pump in Rosemont–La Petite-Patrie
AirGreen installs a Lennox central heat pump in Rosemont–La Petite-Patrie. An energy-efficient HVAC solution adapted to Montreal's climate and available subsidies.
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.
It captures or rejects heat outside. It sits on a level base, above the snow, with free space all around.
The insulated refrigerant lines enter the house through a sealed opening and run to the indoor coil.
A shut-off switch near the outdoor unit isolates it safely for service.
Sitting on the indoor module, it moves heat between the house air and the refrigerant.
Electric furnace or air handler: its fan pushes air through the ducts. The electric backup takes over in extreme cold.
Supply ducts bring air to the rooms; returns bring it back to the unit. Their condition matters as much as the unit's.
It protects the coil and the fan. A dirty filter cuts airflow, so it gets checked regularly.
It runs the heat pump and the backup heat. It must be compatible with the installed system.
An energy-efficient HVAC solution integrated into the urban environment
In the Rosemont–La Petite-Patrie neighborhood, one of our recent projects perfectly illustrates how a Lennox central heat pump can transform residential comfort while respecting the aesthetics and technical constraints of a dense urban environment. The installation on this black brick facade demonstrates our AirGreen team's expertise in integrating a modern, high-performance HVAC solution into a contemporary residential setting.
Why choose a Lennox central heat pump in Montreal?
The Lennox brand is renowned for its highly reliable heating and air conditioning systems. The central range, in particular, is distinguished by:
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High energy efficiency , ideal for reducing annual heating and cooling costs.
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Compatibility with grant programs in Quebec, including LogisVert and Rénoclimat, thanks to performance that meets Energy Star standards.
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Reliable performance in northern climates , adapted to the harsh winters of Greater Montreal.
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Proven durability , thanks to resistant components and a design designed for a long service life.
Technical details and particularities of the installation
This installation presented several technical challenges that our team was able to overcome:
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Reinforced wall bracket : we fixed the outdoor unit to sturdy brackets directly on the facade, guaranteeing stability and durability.
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Protected wiring : Electrical and refrigerant conduits are carefully covered and insulated to withstand the elements and preserve the aesthetics of the building.
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External electrical connection : a safe disconnect box has been installed in the immediate vicinity, facilitating maintenance and complying with local electrical standards.
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Optimized restricted space : the location, close to solar panels, required precise management of distances and clearances to ensure optimal air circulation around the condenser.
Integration with solar panels: towards sustainable housing
A notable feature of this project is the presence of photovoltaic panels installed nearby . This combination illustrates a growing trend in Montreal: the integration of HVAC systems with renewable energy solutions.
The advantages are numerous:
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Reduction of the overall energy bill by offsetting part of the electricity consumption.
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Reduction of the carbon footprint , strengthening the sustainability of the building.
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Real estate enhancement through the installation of modern, ecological and economical equipment.
The installation process by AirGreen
At AirGreen, we favor a clear and structured process:
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Initial assessment : technical visit on site to assess heating and cooling needs, taking into account surfaces, insulation and solar exposure.
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System selection : recommendation of a Lennox central heat pump adapted to the required power (BTU/h), in accordance with grant criteria.
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Careful installation : installation of the outdoor unit on a wall bracket, connection of the refrigerant lines, installation of the circuit breaker and commissioning.
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Performance checks : pressure testing, calibration and airflow optimization to ensure maximum efficiency.
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Customer training : explanation of operation and good maintenance practices.
Result obtained
The owner now benefits from a system:
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Quiet and efficient for four-season comfort.
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Energy efficient , significantly reducing annual energy costs.
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Scalable , compatible with renewable energy solutions already in place (solar panels).
All harmoniously integrated into an urban facade, without aesthetic compromise.
Maintenance and durability
To extend the life of the heat pump, we recommend:
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A complete annual maintenance including cleaning of the coils, checking of pressures and refrigerant fluid.
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A biannual inspection of filters and ducts to maintain optimal indoor air quality.
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A preventive check of the electrical box to ensure safety and avoid any unexpected breakdowns.
With these practices, the lifespan of the device can exceed 15 years, while maintaining its original performance.
AirGreen: a trusted partner for your HVAC projects in Montreal
The installation of this Lennox central heat pump in Rosemont–La Petite-Patrie perfectly illustrates our mission: to offer residents of Greater Montreal sustainable heating and cooling solutions, adapted to Quebec's harsh climate and harmoniously integrated into each residential project.
Whether you are in Montreal, Laval, Longueuil, on the North Shore or the South Shore , our team will support you from selection to installation, including optimizing subsidies and maintaining your system.
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 ducts, the current indoor module, the electrical panel and the planned spot for the outdoor unit.
The equipment combination, capacity and price, in writing. We check whether the combination qualifies for assistance programs.
Access protected, old unit disconnected and removed when it is being replaced.
Electric furnace or air handler, with its coil, connected to the supply and return ducts.
On a level base, raised above the snow, with free space all around.
Insulated, they enter through a sealed opening and run to the indoor coil.
Dedicated circuits, accessible disconnect, a thermostat that works with the heat pump and the backup heat.
Leak test, vacuum, start-up, airflow check and a test of both modes.
Filter, thermostat, backup heat in extreme cold: what to know before winter.
- The on-site estimateWe look at the ducts, the current indoor module, the electrical panel and the planned spot for the outdoor unit.
- The quoteThe equipment combination, capacity and price, in writing. We check whether the combination qualifies for assistance programs.
- Getting readyAccess protected, old unit disconnected and removed when it is being replaced.
- The indoor moduleElectric furnace or air handler, with its coil, connected to the supply and return ducts.
- The outdoor unitOn a level base, raised above the snow, with free space all around.
- The refrigerant linesInsulated, they enter through a sealed opening and run to the indoor coil.
- Electrical and thermostatDedicated circuits, accessible disconnect, a thermostat that works with the heat pump and the backup heat.
- Tests and start-upLeak test, vacuum, start-up, airflow check and a test of both modes.
- The walkthroughFilter, thermostat, backup heat in extreme cold: what to know before winter.
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.
- Check the indoor module's filter.
- Clear winter debris from the outdoor unit.
- Test cooling before the heat arrives.
- Check the filter more often in peak season.
- Keep registers and returns clear.
- Watch condensate drainage near the coil.
- Change or clean the filter.
- Test heating and backup heat before the cold.
- Book periodic maintenance.
- Clear snow around the outdoor unit.
- Store nothing in front of the indoor module.
- Note any unusual noise or smell and call us.
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What people ask us about this kind of work
Can I keep my current ducts?
What happens in extreme cold?
Furnace, air handler, ducted: what is the difference?
Are there grants?
Do I need a permit?
How much can I save?
How is the LogisVert assistance calculated?
Will my current thermostat work?
Central or wall units: which one?
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).