Installation of a Gree Crossover Ductless Heat Pump in Saint-Lambert, South Shore
See how AirGreen’s precise, hidden installation of the Gree Crossover Heat Pump in Saint-Lambert enhances home comfort silently and efficiently!
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 Step Beyond Comfort: Exceeding Expectations with the Gree Crossover Heat Pump
In the quaint town of Saint-Lambert on Montreal’s South Shore, AirGreen recently undertook one of its most intricate and customer-focused HVAC installations. Our mission? To seamlessly integrate a state-of-the-art Gree Crossover 18,000 BTU Ductless Heat Pump into a residence, ensuring not only top-tier functionality but also aesthetic harmony and noiseless operation.
Project Overview
Our latest project involved a complex installation demanded by a client with very particular needs. From the onset, the customer specified the desire for a silent, efficient, and aesthetically pleasing heat pump that not only performs exceptionally but also aligns with energy-saving incentives like the $570 Provincial Grant from the LogisVert Program by Hydro-Québec.
Challenges and Custom Solutions
- Invisibility Required: One of the client’s critical requirements was that all pipes and wires be concealed within the walls. This specification meant no post-installation touch-ups were necessary, presenting a significant challenge given the structural limitations. However, our skilled technicians, with their meticulous planning and execution, ensured every component was perfectly hidden, leaving the interior decor undisturbed.
- Top-of-the-Line Warranty: The customer prioritized reliability, opting for a Gree model that offers an unparalleled 10-year warranty on compressor, parts, and labor — a testament to the durability and quality of Gree’s products.
- Technological Sophistication: The Gree Crossover is equipped with advanced features such as Wi-Fi connectivity, allowing temperature control via the GREE+ app, and G10 Inverter technology, which optimizes performance while reducing energy consumption.
Installation Highlights
- Custom Installation: Tailoring our approach to meet the exact specifications of our client, from strategic placement to the precise installation of the outdoor and indoor units, ensuring optimal efficiency and minimal visual impact.
- Energy Efficiency: With a 23.0 SEER efficiency rating, this installation promises significant energy savings, bolstered by the heat pump’s Energy Star® certification.
- Silent Operation: Achieving a low sound pressure level of 31 dB(A) indoors, the system provides comfort without the common drawback of noise, making it ideal for residential settings where peace is prized.
Customer Satisfaction
The highlight of this project was the client’s reaction. The meticulous attention to detail and customized solutions provided by AirGreen not only met but exceeded the client’s expectations. This installation not only enhanced their home comfort but also aligned with their environmental and financial goals, thanks to the energy-efficient features and available grants.
Why Choose AirGreen for Your HVAC Needs?
- Expertise and Precision: We bring decades of experience and a commitment to precision in every project, ensuring each installation is handled with the utmost professionalism.
- Customer-Centric Approaches: We listen to our clients’ needs and tailor our solutions accordingly, making each installation a bespoke adaptation to their desires.
- Sustainable Solutions: Our installations are designed with sustainability in mind, reducing both your carbon footprint and energy bills.
In the ever-evolving world of HVAC solutions, AirGreen remains a leader in providing innovative and tailored heating and cooling services. Our installation of the Gree Crossover in Saint-Lambert is just one example of how we merge technology with customer care to deliver comfort and satisfaction.
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
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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).