A concrete block loft transformed into a four-season cocoon thanks to a discreet, efficient HVAC system that blends perfectly with the industrial aesthetic.
A Montreal loft that demands as much style as performance
In a loft-style condo in the heart of the Southwest , the goal is clear: to provide stable thermal comfort throughout the year, without compromising the raw look of the exposed concrete block walls . The owner wanted a compact, quiet, energy-efficient and quick-to-install solution. We offer a new-generation Gree wall-mounted heat pump with R-32 refrigerant , an ideal format for the open spaces and high ceilings common in buildings from former industrial wastelands in Montreal .
Why a Gree R-32 for this project?
-
High seasonal efficiency thanks to the inverter compressor; fine modulation of power and significant energy savings on a daily basis.
-
Cold weather heating performance adapted to the Montreal climate (holds up to approximately −25°C to −30°C depending on the sub-range).
-
Reduced noise level , crucial in an open area where kitchen, living room and office share the same volume.
-
R-32 refrigerant , more efficient and with reduced global warming potential compared to R-410A.
-
Sleek design , perfect integration above a metal shelf without clashing with the aesthetics of the textured wall.
Note: when the precise model is not required by the union or for a grant application, we select the most accurate BTU capacity after calculating the load (orientation, glass surfaces, ceiling height, air infiltration).
The challenges of a concrete block wall… and our solutions
Clean drilling and flawless anchors
A block wall requires careful preparation:
-
Precise tracing to respect clearances and align the interior head with existing elements (shelves, tables, sockets).
-
Diamond drilling slightly inclined outwards to ensure gravity drainage of condensates when the geometry of the site allows it.
-
Mechanical expansion anchors and oversized fixing plate to prevent any tearing over time.
Management of refrigeration lines and aesthetics
The owner wanted to maintain the industrial look of the decor. Rather than a standard white plastic hood, we opted for a discreet path :
-
Side outlet from the wall head to a metal cladding aligned with the shelf, which hides refrigeration pipes, communication cable and drain ;
-
Curvature radii respected to preserve the refrigerant charge and minimize losses;
-
Continuous insulation (high density cellular) on the liquid/gas to stop condensation on the sections that remain in the conditioned air.
Condensates: priority to gravity, plan B ready
In this loft, the configuration allows for a continuous slope of the drain towards the outside. We integrate:
-
a double-collared reinforced vinyl pipe ;
-
an anti-odor loop ;
-
an accessible inspection point behind the cladding.
Should the building require it or should the slope become impossible during future work, the location allows for the rapid addition of a silent mini-condensate pump .
Power supply and electrical protection
The indoor header is powered by the outdoor condenser via compliant communication cable . In the habitable area, the surface piping is laid with a line and painted to blend in with the decor. At the panel, we provide a dedicated circuit breaker , a disconnect switch near the condenser and clear labeling : points that simplify HVAC maintenance and reassure the union.
Commissioning methodology: precision and sustainability
Each installation follows a proven procedure:
-
Nitrogen brazing of fittings to prevent internal oxidation.
-
Nitrogen pressure test with monitored drop.
-
Deep vacuum (≤ 500 microns) and stabilization to ensure the absence of moisture.
-
Load opening and adjustment according to the actual length of the lines.
-
Functional controls for cooling and heating: overheating/subcooling, intensity, blowing temperature, inverter modulation, sound level .
-
User settings : modes, timers, oscillations, frost protection, automatic recovery after failure.
The result: consistent comfort without sacrificing style
In this Southwest loft, the Gree heat pump offers:
-
rapid cooling of the living room during heat waves;
-
stable heating during the off-season with a low electricity bill;
-
a remarkable silence , essential in an open space;
-
a visual integration that respects the materiality of the raw wall, thanks to the metal cladding coordinated with the shelf.
All this without cluttering the facades: a strong argument in Griffintown condominiums.
HVAC Operation and Maintenance Tips
-
Filters : clean every 6 to 8 weeks during use.
-
Covering : light dusting of the hood and shelf to preserve air quality.
-
Condensates : annual flushing of the pipe via the access point.
-
Outdoor unit : keep clearances free of leaves/snow, check the disconnect switch and the condition of the support.
-
Annual visit by our technicians: electrical check, tightening, inspection of line insulation, pressure and performance control.
These actions extend lifespan and maintain seasonal yields .
Subsidies and energy compliance in Quebec
Latest-generation R-32 wall-mounted heat pumps may be eligible for assistance when their efficiency and cold resistance coefficients meet current standards. Our team supports:
-
the selection of the model meeting the thresholds;
-
documentation (detailed invoices, installation photos, serial numbers);
-
submission on time.
We cover all of Greater Montreal : Montreal , Laval , Longueuil , North Shore and South Shore .
Salient technical details of this achievement
-
Type : Gree wall-mounted heat pump , R-32 refrigerant, inverter compressor.
-
Interior layout : head above a steel shelf , exposed concrete block walls.
-
Route : side exit, aligned metal cladding , short lines to limit losses; continuous insulation.
-
Condensates : gravity drainage with controlled slope and maintenance access.
-
Electrical : clean surface piping, dedicated circuit, isolator at the condenser.
-
Finishes : stainless steel/galvanized screws, mechanical anchors, careful drilling and waterproof filling.
What if it was at your place?
Whether you live in a loft in the Southwest , a condo in Ville-Marie , a house in Vimont ( Laval ) or a semi-detached in Saint-Bruno ( South Shore ), our team adapts the HVAC installation to the architecture: brick walls, gypsum, concrete, mezzanines, high ceilings, restricted access, demanding unions. We size the BTU capacity as accurately as possible and deal with the details (noise, vibrations, condensates, aesthetics) that make the difference on a daily basis.
The AirGreen advantages
-
Accurate diagnosis and clear advice on recent brands and ranges;
-
Clean execution and respect for the premises;
-
Complete documentation for warranty and assistance programs;
-
Local and responsive after-sales service for Montreal , Laval , Longueuil , North Shore , South Shore .
Express Fair
-
Who is it for? Open spaces, condos, lofts, home offices.
-
Noise : very low in auto speed; ideal for teleworking and summer nights.
-
Winter : efficient heating until very cold depending on the sub-range selected.
-
Aesthetics : choice of cladding (metal, paintable cover) to match raw or finished walls.
-
Maintenance : An annual inspection and clean filters are enough to keep your wall-mounted air conditioner / heat pump at peak performance.