Quiet comfort and understated finishes: careful vertical installation, gravity drain and simplified maintenance
AirGreen Feedback — What We're Putting in Place
In an apartment in Villeray–Saint-Michel–Parc-Extension , our team is installing a Sharp wall-mounted heat pump ( ZU1 range, R-32 refrigerant) to provide efficient heating in mid-season and discreet air conditioning in the summer. The client wants to keep the wall clean, limit drilling and ensure rapid HVAC maintenance . We propose a high installation and a vertical route inside the home, protected by discreet white ducting , which connects to a low outlet with a gravity drain .
The intervention framework
-
Typical urban housing with existing electric baseboards and headroom.
-
Low noise level requirement (adjoining rest area).
-
Neutral interior finish (white walls, molded frame): visual integration is a priority.
-
Easy access to the wall leading to the outside for a short and readable connection route.
Why the Sharp (ZU1 series) in R-32?
-
Next-generation R-32 : better seasonal efficiency and reduced charge vs. R-410A.
-
Smooth start, smooth airflow , reliable electronics and clear diagnostics .
-
Compact and quiet interior design, ideal for homes in Montreal , Laval and Longueuil .
-
Compatibility with various usage profiles (off-season heating, summer cooling over extended periods).
Our installation method: cleanliness, slope and accessibility
Head positioning and air diffusion
The head is fixed at the top , above the circulation area, to optimize:
-
stratification in heating mode (blowed air which sweeps the ceiling then falls back down),
-
uniformity in air conditioning,
-
service access (dismantling of facade, cleaning of filters, temperature measurements).
The motorized shutter is set for a wide sweep, avoiding any direct current towards the rest area.
Protected vertical route and low exit
We create a vertical route for the connections (refrigerants + electricity + condensates) under white sheathing :
-
Bending radii respected to avoid tiring the copper.
-
Continuous insulation on the suction line to eliminate dew and losses.
-
Low outlet near the baseboard: a single hole , carefully sealed with a vapor barrier.
This short, straight route limits pressure losses, simplifies future interventions and keeps the wall visually clean .
Condensate management: gravity-based and reliable
The geometry of the place allows for a gravity drain :
-
Controlled slope from the exit of the tank to through the wall.
-
Regular fixings to avoid water pockets .
-
Clear water test at the end of the work to validate the flow.
In urban areas like Villeray , gravity reduces maintenance (no pump) and lowers acoustic risks.
Sealing and vacuum: our guarantees of durability
-
Nitrogen pressurization of lines during assembly to prevent oxidation.
-
Leak test then deep vacuum (≤ 500 microns) with stabilization and ascent control.
-
Fluid opening and load weighing checked according to the installed length.
Power supply and protections
-
Dedicated compliant circuit, clear identification of conductors, controlled earthing .
-
Checking the load current , voltages and direction of fan rotation .
-
Clearances respected for air circulation and safety.
Commissioning and customer settings
During commissioning, we proceed to:
-
Measurement of blown/intake temperatures and flow balancing.
-
Adjust the flaps to circulate the air along the ceiling and avoid dead zones.
-
Activation of eco functions and standby settings.
-
Express training: filter maintenance, reading indicators , good usage practices depending on the season.
The result observed on site: a rapid drop in the perceived temperature in summer and a uniform rise in heat in spring/autumn, with a very contained noise footprint .
Salient technical details of this pose
Lengths and drilling
-
Interior vertical of approximately 2 to 2.5 m up to a low wall crossing .
-
A single, perfectly sealed hole , vapor barrier and slope respected.
Finishing and integration
-
Discreet white sheathing that follows the angle of the wall and the baseboard.
-
Equidistant fasteners for clean alignment and no vibration.
-
Clearance under the head maintained for service .
Easy HVAC maintenance
-
Filters accessible from the front (routine 4–6 weeks in intensive use).
-
Drain path can be quickly checked (inspection and flushing).
-
Path identification for accelerated diagnostics .
AirGreen usage tips for a wall-mounted heat pump in urban housing
Seasonal adjustments
-
In winter , aim for a stable setting (few day/night differences) to benefit from the optimal COP .
-
In summer , keep 24–25°C and activate dehumidification mode when humidity exceeds ~55%.
-
Point the shutter slightly towards the ceiling for even air mixing.
Hygiene, noise and longevity
-
Clean filters frequently to maintain low sound pressure .
-
Leave 50 cm around the head for sweeping.
-
Schedule annual maintenance : evaporator cleaning, electrical tightening, insulation test, gravity flow check.
Grants and Compliance
Recent high-efficiency wall-mounted heat pumps operating on R-32 are often eligible for financial assistance programs in Quebec. We support our clients to validate eligibility and gather the required documents, whether you are in Montreal , Laval , Longueuil , on the North Shore or the South Shore .
Concrete benefits for the occupant
-
4-season comfort with soft, even diffusion.
-
Appreciable silence in the rest rooms.
-
Energy savings thanks to R-32 and eco settings.
-
Clean wall : aligned white cladding, discreet low outlet, a single drilling.
Why AirGreen for your HVAC installation in Montreal
-
Expertise in urban configurations (plexes, condos, townhouses).
-
Selection of recent brands (R-32 / R-454B) with parts available locally .
-
Rigorous quality procedure : nitrogen, deep vacuum, electrical tests, slope validation.
-
Structured after-sales service : HVAC maintenance reminders, seasonal optimization advice, priority assistance during heat waves and cold spells.
Quick Facts — Installation in Villeray–Saint-Michel–Parc-Extension
-
Type : wall-mounted heat pump (mini-split).
-
Brand : Sharp ( ZU1 , R-32 range).
-
Route : interior vertical under white sheathing , low outlet ; gravity drain .
-
Drilling : single, sealed and watertight.
-
Customer objective : silence, clean wall, minimal maintenance, 4-season comfort.
For a similar HVAC installation project in Montreal , Laval , Longueuil , on the North Shore or South Shore , our AirGreen team carries out a technical visit , provides a clear quote and ensures follow-up until the first interview .