A compact and elegant heat pump for a bedroom with anthracite paint: discreet comfort, high efficiency and careful integration
Background and objectives
In an apartment in Rosemont–La Petite-Patrie , we are installing a Gree wall-mounted heat pump from the Livo R32 range , chosen for its inverter modulation , its sound discretion and its compatibility with grant programs . The main room targeted is a bedroom with dark walls , whose objective is twofold: to cool silently in the summer and to stabilize the temperature during the mid-seasons, without encroaching on the floor space.
The project requires:
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an aesthetic integration at height, as close as possible to the ceiling,
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the shortest possible refrigeration route to optimize yields,
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reliable, invisible, and easy-to-maintain gravity drainage ,
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minimal noise on both the occupant and neighborhood side.
Why the Gree Livo R32 range meets this need
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R-32 (A2L) refrigerant : better seasonal performance and reduced climate impact compared to older R-410A.
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Extended operating range for the Greater Montreal climate, suitable for mid-season supplemental heating .
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Sleek design : the interior head blends naturally into the decor, even on dark walls , without an intrusive light halo.
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Inverter technology : the machine finely modulates its power, reducing on/off cycles and operating costs .
Key steps to a clean HVAC installation in an urban environment
Quick study of the room and air flow
A room painted in anthracite absorbs more solar energy during the day. We take into account:
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of the actual volume ,
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of the orientation of the facade,
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interactions with the corridor and the door,
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ceiling height ,
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internal sources (lighting, appliances).
The high angle of the wall is interesting, but requires careful lateral clearances to avoid air recirculation (supplied air taken back too quickly by the unit). We adjust the fins to sweep the room and not stick the flow to the ceiling.
Choice of refrigeration passage
Here, the configuration allows a rear passage directly into the wall, with a short crossing . Advantages:
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Minimal pressure losses ,
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Aesthetics : no visible chute in the room,
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Fewer weak points for insulation and humidity.
The refrigerant line is continuously insulated , with discreet retaining collars and watertight sealing on both the inside and outside.
Gravity drainage, silence guaranteed
We favor gravity (without pump):
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Constant slope confirmed at the electronic level,
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Anti-vibration flanges on the condensate tray,
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Flow test at the end of installation.
Result: zero pump noise , reduced risk of maintenance and breakdown.
Electrical and safety part
The indoor unit is powered by the outdoor condenser via a communication/power cable that complies with Quebec codes . We add:
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Outdoor disconnect switch within easy reach,
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Drop loops at the penetrations,
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Discreet cable clips to eliminate any dangling wires.
Each connection is tightened to the specified torque and checked with a multimeter .
Methodical commissioning: what we check
Sealing and high vacuum (R-32 A2L)
R-32 is an A2L fluid which requires rigor:
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Nitrogen pressure test to track down the slightest leak,
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High vacuum to 500 microns (or better) with stabilization,
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Checking the flares and replacing them if the surface condition is not perfect,
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Insulation of fittings against friction at the drilling point.
Performance parameters
After launch, we validate:
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Intensities and voltages within tolerances,
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Blowing and return temperatures to confirm the exchange,
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Shutter management to avoid direct airflow on the occupant,
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Actual sound level in low and automatic mode.
Sizing: How many BTU/h for a room?
In a typical Rosemont room, 9,000 BTU/h often covers the need. We refine according to:
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envelope (windows, infiltration),
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sun exposure ,
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night use (priority to silence ),
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door open/closed (interaction with the rest of the accommodation).
Oversizing is a trap: short cycles, noise, less efficient dehumidification. With the inverter , good practice is to target the actual load , then let the machine modulate finely .
Finishing and invisible details that matter
External support management and defrosting
On the outside, we install the condenser on a raised support with anti-vibration pads . Benefits:
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clearance for defrost water in winter,
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less transmitted structural noise ,
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easy access for HVAC maintenance .
Air cleaning and hygiene
Clean air passes through a dust-free indoor turbine and heat exchanger . Our maintenance contract includes:
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disassembly and gentle cleaning of the turbine,
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disinfection of trays and drain pipes,
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checking the insulation of the connections and the tightening of the terminal blocks.
Tips for a Comfortable Bedroom
Recommended settings
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Auto mode for modulation ; switches to Dry during humid episodes to stabilize humidity .
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Slightly upward vane orientation and horizontal oscillation activated for uniform sweep .
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At night, prefer Silence/Low mode ; the heat pump maintains the setpoint without gusts.
To avoid
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Block the space under the head with tall furniture .
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Leaving a pendulum cable running across the ceiling angle: In addition to aesthetics, this can disrupt airflow and pick up vibrations. We always secure and route cables neatly.
Result at our client in Rosemont
Upon commissioning:
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Temperature stabilized quickly, without jolts,
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Very quiet noise at night,
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Humidity controlled in hot weather,
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Moderate consumption thanks to modulation and short refrigeration path .
The client notes better sleep and less heavy air , even during heat waves.
Grants and administrative support
High-efficiency R-32 wall-mounted heat pumps are generally eligible for assistance programs in Quebec. Our team supports each file in Montreal , Laval , Longueuil , as well as on the North Shore and the South Shore :
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verification of technical criteria ,
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preparation of installation evidence ,
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tips for optimizing the chosen capacity and efficiency class .
Preventive maintenance: the key to lifespan
Frequencies
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Filters : rinse every 4 to 8 weeks during use.
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Annual inspection : exchanger, turbine, drainage , intensity measurement , updating of tightenings.
Benefits
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Yields maintained,
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Controlled noise and vibrations ,
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Increased longevity of electronic and mechanical components.
Highlights of the AirGreen installation
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Type : Gree wall-mounted heat pump , Livo R32 range .
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Room served : bedroom, high corner installation near ceiling.
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Route : short rear crossing , continuous insulation , careful sealing.
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Drainage : controlled slope gravity , flow test carried out.
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Electricity : power supply from the outdoor unit, disconnect switch and protected routing.
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Acoustics : Low/Silent night settings, anti-vibration pads on the condenser side.
AirGreen: your HVAC partner in Rosemont and throughout Greater Montreal
We design HVAC installations that respect buildings , occupants and regulations . From sizing to commissioning , then to HVAC maintenance , we guarantee clean , compliant and sustainable execution in Montreal , Laval , Longueuil , on the North Shore and the South Shore .