Installation of a Gree Livo R32 wall-mounted heat pump in Côte-des-Neiges–Notre-Dame-de-Grâce
Gree Livo R32 wall-mounted heat pump installed on a flat roof in Côte-des-Neiges–NDG: support on logs, watertight penetration, short run, certified commissioning. AirGreen, HVAC installation experts in Montreal, Laval, Longueuil, North Shore and South Shore.
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The job on one screen
The unit’s data sheet
The range as published on airgreen.ca: pick a size to see its capacity in deep cold.
| Size | Heating at −8 °C | Heating at −15 °C | Coldest certified point | COP at −15 °C | SEER | HSPF | Indicative LogisVert aid |
|---|---|---|---|---|---|---|---|
| Gree Livo R32 9 000 (115 V) | 10,000 | 7,600 | −25 °C: 5,700 | 1.86 | 20.5 | 8.8 | – |
| Gree Livo R32 9 000 | 9,600 | 7,600 | −25 °C: 5,500 | 1.94 | 20.5 | 8.8 | – |
| Gree Livo R32 12 000 (115 V) | 9,700 | 8,500 | −25 °C: 6,500 | 1.75 | 19.0 | 8.5 | – |
| Gree Livo R32 12 000 | 9,700 | 9,100 | −25 °C: 6,500 | 1.8 | 19.0 | 8.5 | $1,164 |
| Gree Livo R32 18 000 | 15,300 | 12,100 | −25 °C: 10,200 | 1.85 | 20.0 | 8.5 | $1,836 |
| Gree Livo R32 24 000 | 19,200 | 15,700 | −25 °C: 10,500 | 1.75 | 19.0 | 8.5 | $2,304 |
| Gree Livo R32 30 000 | 24,000 | 23,000 | −25 °C: 16,900 | 1.8 | 22.0 | 9.0 | $2,880 |
| Gree Livo R32 36 000 | 27,400 | 24,600 | −25 °C: 21,000 | 1.8 | 21.0 | 8.5 | $3,288 |
According to NEEP, it delivers 10,000 BTU/h at −8 °C (17 °F), as much as at 8 °C. It heats as hard in moderate cold as in mild weather.
According to NEEP, its certified maximum capacity at −25 °C (−13 °F) is 5,700 BTU/h, 63% of its nominal 9,000 BTU size.
At 8 °C, its certified maximum capacity reaches 13,300 BTU/h, 48% more than its nominal 9,000 BTU size.
According to NEEP, its COP at −15 °C is 1.94: the highest of the Livo R32 line, which ranges from 1.75 to 1.86 at that temperature.
According to NEEP, its certified maximum capacity at −25 °C (−13 °F) is 5,500 BTU/h, 61% of its nominal 9,000 BTU size.
At 8 °C, its certified maximum capacity reaches 13,136 BTU/h, 46% more than its nominal 9,000 BTU size.
According to NEEP, it delivers 8,500 BTU/h at −15 °C, against 9,100 for the Gree Livo R32 12 000.
At −25 °C, its certified minimum capacity is 1,800 BTU/h (3,070 at 8 °C). It slows down instead of cycling on and off.
According to NEEP, its certified heating capacity at −15 °C (5 °F) is 8,500 BTU/h, 71% of its nominal 12,000 BTU size. Its COP there is 1.75.
According to NEEP, it delivers 9,100 BTU/h at −15 °C, against 8,500 for the Gree Livo R32 12 000 (115 V).
At −25 °C, its certified minimum capacity is 1,800 BTU/h (3,070 at 8 °C). It slows down instead of cycling on and off.
According to NEEP, its certified heating capacity at −15 °C (5 °F) is 9,100 BTU/h, 76% of its nominal 12,000 BTU size. Its COP there is 1.80.
At 8 °C, its certified maximum capacity reaches 22,500 BTU/h, 25% more than its nominal 18,000 BTU size.
According to NEEP, its certified minimum capacity is at least 7,000 BTU/h at every temperature. In a small, well-insulated room it will cycle on and off more often: size it carefully.
According to NEEP, its certified heating capacity at −15 °C (5 °F) is 12,100 BTU/h, 67% of its nominal 18,000 BTU size. Its COP there is 1.85.
At −25 °C, its certified minimum capacity is 3,100 BTU/h (5,800 at 8 °C). It slows down instead of cycling on and off.
According to NEEP, its certified heating capacity at −15 °C (5 °F) is 15,700 BTU/h, 65% of its nominal 24,000 BTU size. Its COP there is 1.75.
According to NEEP, its certified heating capacity at −15 °C (5 °F) is 23,000 BTU/h, 77% of its nominal 30,000 BTU size. Its COP there is 1.80.
According to NEEP, its COP at −25 °C is 1.54: the highest of the Livo R32 line, which ranges from 1.30 to 1.52 at that temperature.
At −25 °C, its certified minimum capacity is 7,000 BTU/h (10,000 at 8 °C). It slows down instead of cycling on and off.
According to NEEP, its certified heating capacity at −15 °C (5 °F) is 24,600 BTU/h, 68% of its nominal 36,000 BTU size. Its COP there is 1.80.
Data read live from the airgreen.ca page of each size (NEEP / AHRI certified performance). When the title names the installed size, it is highlighted; otherwise the whole range is shown. The aid shown is today’s, using Hydro-Québec’s rule ($120 per 1,000 BTU/h at −8 °C); amounts quoted in the article date from its publication. Only Hydro-Québec confirms the assistance granted.A dash in the aid column: amount to be confirmed for this model.
The article, chapter by chapter
A flat roof installation designed to last, quiet and compliant with HVAC best practices
Project background
At AirGreen , we were contacted by a co-owner of a residential building located in Côte-des-Neiges–Notre-Dame-de-Grâce . The goal: to add a high-performance wall-mounted heat pump to ensure four-season comfort without cluttering the facade. The choice was a Gree Livo R32 , a recent single-zone unit operating with R-32 refrigerant, appreciated for its stable performance and ease of maintenance.
Site characteristics and implementation strategy
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Flat gravel roof with technical access: ideal for installing the condenser away from view and noise pollution.
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Short route of refrigeration connections to the apartment's technical column, limiting pressure losses and improving seasonal efficiency.
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Protected facade : no footprint on the ground or balcony, which complies with the condominium regulations.
We prefer installation on a roof support : galvanized steel frame fixed on treated logs placed on the gravel, guaranteeing load distribution and impeccable stability. Anti-vibration pads and an expansion loop (service loop) on the refrigeration lines reduce the transmission of vibrations to the structure.
Installed device and technical characteristics
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Brand / Range : Gree – Livo R32 (single-zone).
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Type : wall-mounted heat pump (mini-split).
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Refrigerant : R-32 with low GWP compared to R-410A.
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Operating range : adapted to Montreal 's climate, with optimized winter heating mode and automatic defrosting.
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Sound level : discreet condenser, particularly relevant in dense urban environments (CDN-NDG, City of Montreal ).
For homes in Montreal, Laval, Longueuil, North Shore and South Shore , this single-zone architecture offers an excellent comfort/consumption ratio when a single space needs to be treated efficiently.
Installation details visible on site
Supports and clearances
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Frame on logs : two treated wooden logs support the metal support, ensuring flatness and durability on gravel.
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Clearances maintained around the condenser for air intake/discharge, simplifying HVAC maintenance and snow removal.
Refrigeration connections and sealing
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Short route (≈ 6–8 m) between condenser and technical column.
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Continuous UV insulation of lines (return and liquid) with finishing tape; expansion loop limiting mechanical fatigue.
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Roof penetration via a waterproof metal box/flashing : vapor barrier, peripheral mastic and cable glands for perfect water and air tightness .
Power supply and compliance
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Dedicated 240V circuit from the dwelling unit panel, adequate protection; service switch near the condenser on the roof.
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Grounding verified and sheathed wiring meets RBQ/CSA requirements.
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Commissioning tests : vacuum < 500 microns, pressurized nitrogen test, leak test, load adjusted according to actual length.
Interior: targeted comfort and careful aesthetics
The wall-mounted head is positioned to evenly sweep the living area while avoiding direct airflow. The lines are aligned with the service column; condensate is drained by gravity to the outside, eliminating the risk of pump noise and reducing maintenance.
Why the Gree Livo R32 for this type of installation?
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Efficiency : very good cooling and heating performance for well-insulated apartments.
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R-32 : better volumetric efficiency and reduced climate impact compared to R-410A.
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Silence : discreet condenser and evaporator, perfect for dense residential areas ( Montreal intramural ).
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Service and parts : local availability, simple HVAC maintenance thanks to a proven architecture.
Progress of the work (chronology)
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Technical validation with the co-ownership union (location on roof, routing of lines, access).
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Roof protection and support installation: checking slopes and flow points.
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Controlled drilling of the slab/roof and installation of the metal flashing .
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Passage of refrigerant connections and control wiring; continuous insulation and expansion loop .
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Electrical connections on dedicated circuit and installation of proximity switch.
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Pressure tests , vacuum drawing, valve opening, commissioning and fine tuning (flow rates, silent mode, temperature monitoring).
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Submission of a commissioning report with key measurements and maintenance instructions.
Result: comfort, silence and energy efficiency
The customer immediately benefits from precise comfort in summer and winter, quiet operation and controlled consumption . The condenser located on the roof frees up the facade and avoids nuisances for the neighborhood. The whole thing complies with current standards and remains easy to maintain : winter defrosting, cleaning of the coils, rinsing of the interior filters and annual inspection.
Recommended preventive maintenance
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Clean filters every 4 to 8 weeks depending on usage.
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Annual inspection by an AirGreen technician: leak check, gentle chemical washing of the coils, verification of blowing intensities and temperatures.
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Condenser clearances : Keep 60–90 cm free and clear snow around the edges to maintain performance in extreme cold.
Points of attention and pitfalls to avoid (AirGreen feedback)
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Improvised supports : a condenser placed directly on the gravel ends up destabilizing and damaging the membrane. We use a dedicated frame on logs with anti-vibration pads.
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Leaky penetrations : Without flashing and vapor barriers, moisture can seep in. Our sealed metal enclosure protects the roof and connections.
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Too long line : Making the route short and straight preserves the refrigerant charge and seasonal efficiency.
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No disconnect : The service switch within reach of the technician is essential for safety and compliance.
Grants and Compliance
When the wall-mounted heat pump chosen is ENERGY STAR certified with cold weather heating performance, certain local financial assistance may apply depending on the program in effect and the configuration. Our team verifies eligibility at the time of the quote for our customers in Montreal, Laval, Longueuil, North Shore and South Shore .
What the customer remembers
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A clean construction site, a preserved roof, and a durable HVAC installation .
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An efficient, discreet and easy to maintain R-32 device.
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A turnkey AirGreen service : advice, installation, commissioning and monitoring.
Are you considering a wall-mounted heat pump on a flat roof in Montreal or the suburbs? Our teams respond quickly in Laval , Longueuil , on the North Shore and the South Shore with solutions adapted to your building and your co-ownership regulations.
The job tools
Two quick checks with real numbers: what heat costs, and what your current heaters add up to in BTU/h.
Baseboards and electric furnaces turn 1 kWh of electricity into 1 kWh of heat. A heat pump delivers more: that is its COP. At Hydro-Québec’s rate D (11.142¢/kWh above 40 kWh a day, since 1 April 2026):
Hydro-Québec: a heat pump can be up to three times more efficient than baseboards for heating in the colder months.
Estimate per kWh of heat, at the chosen temperature, using the certified COP from the product page. Taxes, access charge and backup heat not included.
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.
How the job unfolds
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 we check on a job like this one
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.
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.
Good habits, once the unit is in place
Six simple habits that keep the unit going. Your list stays on this device.
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.
The right pages, at the right time
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.
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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).