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Can I Install a Wall-Mounted Heat Pump by Myself?

Can I Install a Wall-Mounted Heat Pump by Myself?

Welcome to AirGreen, your go-to HVAC company in Montreal. We specialize in the provision and installation of wall-mounted heat pumps, also known as mini-splits, that offer both cooling and heating functionalities. A common question we receive is: "Can I install a wall-mounted heat pump by myself?" This comprehensive guide aims to provide an in-depth answer to this query.

A Brief Overview of Wall-Mounted Heat Pumps

Wall-mounted heat pumps, often referred to as mini-splits, are HVAC systems that offer a solution for both heating and cooling your home or commercial space. They consist of an indoor unit that mounts on the wall and an outdoor unit housing the compressor. The units are connected by a conduit carrying the electrical lines, refrigerant piping, and a condensate drain.

Operating through heat transfer rather than heat generation, these units draw heat from outdoor air and transfer it indoors during winter. Conversely, in summer, they extract heat from your indoor air and release it outdoors.

Understanding Heat Pump Installation

Installing a wall-mounted heat pump is not a straightforward process—it's a complex task that involves a broad range of skills, including electrical work, plumbing, and knowledge of HVAC systems. The installation involves many steps, including mounting the indoor unit, installing the outdoor unit, drilling a hole through the wall for the conduit, and connecting the units.

The Risks of DIY Installation

While DIY may be appealing for its perceived cost savings, the risks associated with attempting to install a heat pump on your own are significant:

  1. Safety Hazards: Installing a heat pump involves electrical connections and handling refrigerants. Mistakes could lead to accidents or even fire hazards.
  2. Invalidated Warranty: Most manufacturers require professional installation for their warranty to be valid. DIY installation could void your warranty, leaving you with no recourse if problems arise later.
  3. Inefficient Performance: A poorly installed heat pump can lead to inefficient operation, potentially increasing your energy bills and reducing the unit's lifespan.
  4. Building Code Violations: HVAC installations often require permits to ensure they meet local building codes. Failure to comply with these codes could result in fines and the need for costly modifications.

The Value of Professional Installation

Here's why entrusting the installation of your wall-mounted heat pump to a professional is essential:

  1. Expertise: Professionals have the training and experience to correctly install your heat pump, ensuring optimal performance and longevity.
  2. Warranty Protection: With a professional installation, your warranty remains intact, giving you peace of mind.
  3. Code Compliance: A professional installer will be familiar with local building codes and can ensure your installation is compliant.
  4. Correct Sizing: Professional installers can accurately assess the correct size of the heat pump your space needs, ensuring efficient operation.
  5. Time and Effort: Installing a heat pump is time-consuming and physically demanding. By hiring a professional, you save yourself the effort and have more time for other activities.

The AirGreen Approach to Heat Pump Installation

At AirGreen, we provide a comprehensive approach to wall-mounted heat pump installations:

  1. Site Assessment: We conduct a thorough evaluation of your site to understand your specific cooling and heating needs.
  2. Recommendations: Based on the assessment, we recommend the most suitable wall-mounted heat pump for your needs.
  3. Professional Installation: Our experienced team ensures the installation is carried out correctly, safely, and in compliance with local codes.
  4. Post-installation Support: After the installation, we provide support and maintenance services to keep your heat pump running optimally.


While it might be tempting to take on the installation of a wall-mounted heat pump as a DIY project, the associated risks and potential pitfalls make it a job best left to professionals. At AirGreen, we're dedicated to delivering top-tier HVAC services and helping you understand how to maximize your HVAC system for a healthier, more comfortable indoor environment. You can trust us to guide you at every step—from product selection and installation to ongoing maintenance.