Thermopompe murale multi-zone : les erreurs les plus fréquentes des installateurs amateurs au Québec
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Multi-Zone Wall-Mounted Heat Pumps: The Most Common Mistakes Made by Amateur Installers in Quebec

Practical Tips from AirGreen to Avoid Classic Pitfalls During Your HVAC System Installation

As HVAC experts serving Montreal, Laval, Longueuil, and the North and South Shores, at AirGreen we regularly intervene to correct faulty installations performed by amateurs. These mistakes, often avoidable, compromise thermal comfort, increase energy costs, and shorten the lifespan of multi-zone wall-mounted heat pumps.

This article highlights the most common mistakes observed during our service calls and provides detailed advice to ensure a successful, safe, and optimal installation.

Mistake #1: Incorrect Sizing of the Heat Pump

One of the most frequent errors concerns inappropriate selection of the heat pump’s capacity (BTU). An overly powerful model leads to premature wear, while an undersized model struggles to heat or cool your home effectively.

AirGreen's Advice:
We consistently recommend a precise calculation of thermal needs by a qualified professional. For example, a typical home in Laval might require a 24,000 BTU multi-zone heat pump (such as the Fujitsu Halcyon or the Gree Multi+ Ultra), while a condominium in Longueuil might adequately manage with an 18,000 BTU model.

Mistake #2: Poor Choice of Location for the Outdoor Unit

Incorrect placement of the outdoor unit is a common mistake that significantly reduces system efficiency. Excessive exposure to sunlight, harsh weather conditions, or obstacles obstructing airflow can cause frequent icing problems and significant efficiency loss.

AirGreen's Solution:
Our team always prioritizes well-protected locations, ensuring optimal airflow and effective shielding against the prevailing winds typical of Montreal and its surrounding areas.

Mistake #3: Improper Connection of Refrigerant Lines

Incorrect connection of refrigerant piping is frequently the root cause of costly leaks of refrigerant gas (R-410A, R-32). This directly affects heat pump performance and generates significant additional expenses.

AirGreen's Intervention:
During a recent correction on the South Shore, our technicians efficiently detected and repaired a refrigerant gas leak caused by an improper connection, swiftly restoring the system's energy efficiency.

Mistake #4: Non-Compliant Electrical Installation

Amateur electrical installations pose major safety risks and can lead to frequent breakdowns or even irreversible damage to your heat pump.

AirGreen’s Safety Advice:
For every installation performed in Montreal, Laval, or Longueuil, we strictly adhere to Quebec's Electrical Code standards. We systematically verify voltage compatibility (115V or 220V), proper circuit protection (breakers), and wiring integrity.

Mistake #5: Neglecting Drainage and Defrost Systems

Multi-zone systems require effective drainage and defrost systems to prevent harmful water or ice buildup. Poor drainage often causes damage to exterior walls and significantly reduces equipment lifespan.

Real-Life AirGreen Example:
We recently corrected a faulty installation in Terrebonne (North Shore), where inadequate drainage caused water infiltration into the wall structure, resulting in expensive repairs. Our team completely redesigned the drainage system, permanently resolving the issue.

How Does AirGreen Ensure a Flawless Installation of Your Multi-Zone Heat Pump?

At AirGreen, we follow a rigorous methodology to ensure each installation meets our high standards:

  • Comprehensive thermal needs analysis (surface area, insulation, sun exposure)

  • Tailored equipment selection (renowned brands like Fujitsu, Gree, Lennox, Midea)

  • Meticulous installation by certified technicians

  • Rigorous commissioning tests to guarantee optimal performance from the first use

Genuine Testimonials from Our Satisfied Customers

Recently in Boucherville, we replaced a multi-zone heat pump poorly installed by an amateur, which was causing uncomfortable temperature fluctuations and excessive energy costs. After our professional intervention, the customer noted a dramatic improvement in daily comfort and a significant reduction in energy bills.

Why Choose AirGreen for Your Multi-Zone Heat Pump in Montreal and Surrounding Areas?

Working with AirGreen means benefiting from:

  • Proven expertise from a team specialized in HVAC installations

  • Rapid and efficient interventions, adapted to Quebec's harsh climate

  • Personalized support in obtaining government grants available in Montreal, Laval, Longueuil, and surrounding areas

Want to Avoid These Costly Mistakes?

Entrust your multi-zone wall-mounted heat pump installation to the AirGreen experts. Enjoy a durable, safe, and perfectly adapted HVAC solution for your home or business starting today.

Contact us now for a free consultation and find out why thousands of satisfied customers in Montreal, Laval, Longueuil, the North Shore, and the South Shore trust AirGreen for their HVAC installations.