Installation of a Gree Multi+ Ultra DoubleZone Heat Pump in Sainte-Marthe-sur-le-Lac
AirGreen's detailed installation of a Gree Multi+ Ultra DoubleZone Heat Pump in Sainte-Marthe-sur-le-Lac highlights our commitment to excellence. Eligible for a $2,148 LogisVert Grant from Hydro-Québec. Read more!
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 Comprehensive Look into Our Recent Gree Heat Pump Installation
At AirGreen, we pride ourselves on delivering top-notch HVAC services to our valued clients across Montreal, Laval, Longueuil, North Shore, and South Shore. Our latest installation in Sainte-Marthe-sur-le-Lac demonstrates our commitment to quality and customer satisfaction. This project involved the installation of a Gree Multi+ Ultra DoubleZone Heat Pump, a state-of-the-art unit designed to provide efficient heating and cooling solutions.
Project Overview
- Location: Sainte-Marthe-sur-le-Lac
- Type of Machine: DoubleZone Heat Pump
- Brand: Gree
- Model: Multi+ Ultra
- Compressor Size: 24,000 BTU
- Indoor Units: Two 12,000 BTU units
Installation Challenges and Successes
This installation was quite a task, requiring us to dedicate an entire day and even extend into the evening to ensure everything was done perfectly. The meticulous effort was essential to guarantee the optimal performance of the unit and the satisfaction of our client.
The Gree Multi+ Ultra: A Closer Look
Cooling and Heating Capacity
The Gree Multi+ Ultra is a powerful unit with a cooling capacity of 24,000 BTU and a heating capacity designed to perform efficiently down to -35°C. This makes it an ideal choice for the harsh winters of Quebec.
Dimensions and Specifications
- Exterior Dimensions (L x D x H): 39.48 x 16.41 x 31.11 inches
- Serial Number (Exterior): MULTIU24HP230V1DO
- Energy Efficiency: 23.0 SEER, Energy Star® certified
- Sound Pressure Level (Exterior): 60.0 dB(A)
- Voltage: 220V
- Refrigerant: Eco-responsible R-410A
- Warranty: 12-year compressor and parts warranty
Advanced Features
- WiFi Enabled: Allows for remote control and monitoring.
- Self-Diagnosis Function: Ensures easy maintenance and troubleshooting.
- Automatic Defrost Function: Enhances the unit's efficiency and longevity.
- Reinforced Steel Box: Provides durability and protection against the elements.
- Low Voltage Start: Ensures reliable operation during voltage fluctuations.
- Anti-Corrosion Coating: Protects the fins, extending the unit's lifespan.
Environmental and Economic Benefits
The Gree Multi+ Ultra is not just an HVAC unit; it's an investment in comfort and efficiency. With its Energy Star certification, this heat pump is designed to reduce energy consumption, translating to lower utility bills and a reduced carbon footprint.
Installation Day: A Detailed Account
From the moment we arrived at the picturesque town of Sainte-Marthe-sur-le-Lac, we knew this installation was going to be special. The client had specific needs, and we were ready to exceed their expectations. The first step was to carefully position the outdoor compressor unit. Given its substantial size and weight, this required precision and teamwork.
Next, we focused on installing the two 12,000 BTU indoor units. These were strategically placed to maximize the efficiency of both the heating and cooling functions. Each indoor unit was mounted with care, ensuring they were secure and optimally positioned for airflow.
Attention to Detail
Throughout the installation process, we paid close attention to every detail. From the wiring to the refrigerant lines, each component was meticulously installed to ensure the system's longevity and reliability. Our team worked diligently, taking necessary breaks to reassess and ensure everything was proceeding according to plan.
Challenges Overcome
One of the significant challenges was the extended hours required to complete the installation. We had to work through the evening, ensuring that we maintained our high standards even as the sun set. The final result was a seamless installation that met all the client’s needs and more.
LogisVert Grant from Hydro-Québec
An added advantage for our client was that the Gree Multi+ Ultra is eligible for the LogisVert Grant from Hydro-Québec, amounting to $2,148. This grant makes high-efficiency HVAC solutions more accessible and affordable, encouraging homeowners to opt for eco-friendly options.
Customer Satisfaction
By the end of the day, despite the long hours, seeing the satisfaction on our client’s face made it all worthwhile. They were particularly impressed with the system's quiet operation and the seamless integration of the indoor units.
Why Choose AirGreen?
At AirGreen, our mission is to provide not just HVAC services but peace of mind. We ensure that every installation is performed with the utmost care and precision. Our team is experienced, dedicated, and ready to tackle any challenge to deliver the best results for our clients.
Conclusion
The installation of the Gree Multi+ Ultra DoubleZone Heat Pump in Sainte-Marthe-sur-le-Lac is a testament to our commitment to quality and customer satisfaction. This high-efficiency unit is now ready to provide year-round comfort, thanks to our meticulous installation process.
For more information on our services and to see more examples of our work, visit our website. Choose AirGreen for all your HVAC needs and experience the difference that expertise and dedication can make.
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).