Installation of a Sharp ZU1 wall-mounted heat pump in Rosemont–La Petite-Patrie

Precise comfort for a Montreal ground floor, installed cleanly and designed to last

Project background

In a bright ground floor in Rosemont–La Petite-Patrie , the client was looking for efficient supplemental heating and discreet cooling for the living area (open kitchen and living room). We recommenda Sharp ZU1 series wall-mounted heat pump (R-32), ideal for Montreal homes looking for four-season performance with controlled consumption.

The installed equipment

• Type : wall-mounted heat pump (mini-split)

• Brand : Sharp

• Range : ZU1 (new generation R-32)

• Target capacity : 12,000 BTU for a main area of ​​~35–45 m²

• Highlights : High seasonal efficiency, quiet operation, easy-access filters, wide-sweep motorized damper, lower GWP refrigerant ( R-32 ).

Objective: to ensure stable comfort while reducing energy bills in the face of Montreal 's typical weather peaks.

HVAC Installation Details

• Indoor installation : head placed ~20 cm from the ceiling to promote the Coanda effect and minimal air stratification .

• Connection route : careful rear drilling (Ø ≈ 65 mm) with gravity slope for condensate drainage to the outside, avoiding any unnecessary condensate pump .

• Estimated length of refrigeration lines: ~3–4 m, ideal for limiting pressure losses and maintaining efficiency.

• Finish : discreet interior capping , white tint, aligned with the moldings; stainless steel screws.

• Vibration attenuation : calibrated pads and spacers; check of the tightening torque of the flared fittings; balance test of the flap to avoid whistling.

• Testing and commissioning : deep vacuum (< 500 microns), nitrogen leak test , overheating/subcooling check, then calibration of the instructions.

Construction site challenges and solutions

• Reduced ceiling height near a room corner: we positioned the head to optimize air intake and diffusion, without hindering circulation or wall furniture.

• Short route but sensitive crossing : controlled drilling with clean coring, watertight sheath and vapor barrier to prevent the entry of parasitic air and condensation in cold weather.

• Interior aesthetics : minimalist routing, low-projection trunking, clean cut at the baseboards for a harmonious finish.

Result for the occupant

• Rapid cooling in summer, efficient heating in the off-season and as a supplement in winter.

• Low noise level : the interior head remains very quiet during regulation.

• Temperature uniformity : automatic scanning covers the entire living area; hot/cold spots are reduced.

• Optimized consumption : the inverter finely adjusts the power, limiting on/off cycles.

What the Sharp ZU1 brings to a Montreal home

• R-32 : better environmental profile than R-410A and very good thermodynamic performance.

• Extreme cold : regulation designed for our winters, with maintenance of capacity at low temperatures* ( within the range; we calibrate the size and operating curve according to the part ).

• Filtration : Front access to filters for simple and frequent HVAC maintenance , ensuring cleaner air and stable performance.

Eligibility and subsidies (depending on configuration)

Depending on the BTU capacity and seasonal efficiency of the selected configuration, the installation may be eligible for assistance programs in Quebec. We validate the criteria on a case-by-case basis with our clients in Montreal, Laval, Longueuil, the North Shore, and the South Shore and prepare the necessary files.

Usage tips to maximize comfort

1. Constant setpoint : avoid sudden variations; let the inverter work.

2. Automatic sweep : in summer, orient slightly upwards to diffuse without direct air current; in winter, horizontal sweep to mix the stratified air.

3. Open doors : To cool the hallway and adjoining rooms, leave the passageways open during heat waves.

4. Dehumidification mode : useful in spring and summer for hygroscopic comfort without overcooling.

Recommended HVAC maintenance

• Filters : Rinse every 4–6 weeks during heavy use.

• Exchanger & turbine : annual professional cleaning to maintain flow and prevent deposits.

• Outdoor unit (courtyard/balcony side): 30–45 cm clearance, cleaning of fins, preventive de-icing in winter if accumulation.

• Annual inspection : checking pressures , operating temperatures , condensate drainage and tightness of connections.

Common mistakes to avoid

• Undersize capacity for an open living area.

• Block the recovery (shelves, frames, beams).

• Forget the gravity slope or the drain sleeve through the wall, sources of drips or unwanted cold air.

• Neglecting the vacuum and the test : these steps determine the longevity of the compressor.

Why choose us?

At AirGreen , we manage everything: load calculation , head selection , aesthetic integration, standardized installation , commissioning checks and support for subsidies . Our team dedicated to Greater Montreal responds quickly in Montreal, Laval, Longueuil, North Shore and South Shore , with planned slots to limit housing immobilization.

Site sheet - in brief

• Address : Rosemont–La Petite-Patrie sector (Montreal)

• Appliance : Sharp ZU1 series wall-mounted heat pump (R-32), 12,000 BTUs calibrated for the living area

• Installation : high head, rear drilling , gravity drain, connections ~3–4 m, discreet white capping

• Commissioning : deep vacuum, nitrogen test, thermodynamic checks, fine adjustments of the shutter

• Objective : four-season comfort and control of operating costs

Need a similar project?

We recommend, size, and install wall-mounted heat pumps tailored to your building: plex, condo, or house. Contact AirGreen for a quick study and an accurate quote.