Installation of an OUELLET Harmony 12,000 BTU heat pump in St-Constant

Saint-Constant
Ouellet
Installation
May 2026

We carried out the complete installation of a wall-mounted heat pump in a house located in Saint-Constant for a client.

The installed model is an Ouellet Harmony 12,000 BTU , a unit well suited to improving the comfort of the home in both air conditioning and heating.

For this project, we carried out the installation from A to Z : passage of the refrigeration piping, installation of the required electrical wire, connections, installation of the indoor unit and installation of the outdoor unit on a wall support .

This type of installation requires good planning to ensure reliable operation, adequate drainage, good stability of the outdoor unit and a clean finish.

At HVAC MTL , we carry out complete installations of wall-mounted heat pumps with particular attention to the quality of the work, compliance and durability of the installation.

Project photos

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A local team based in Montréal’s Sud-Ouest, serving the whole island, Laval and the South Shore.

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Address4035, rue Saint-Ambroise, bureau 216, Montréal (Québec) H4C 2E1 Phone438.816.0992 Emailinfo@hvacmtl.net

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Maggie Lacasse
Another company had screwed me over schedule wise and HVAC MTL came within 24h of me calling AND during summer construction holidays. They fixed my issue within an hour and were lovely. Thank you, highly recommend!
Tanya R. Santos
I had an excellent service from this company. Every team member was courteous, kind and respectful. […] I live in a condo in the sub-basement and there are 4-5 floors in the building. I know sometimes contractors are hesitant with working with condo buildings because of its complexity. However, for this company, it was not an issue at all.
lucas tropini
Excellent service, fast, reliable, and professional. The whole team is very friendly. I highly recommend this company.
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Marie-Maude Denis
Excellent service, well-organized company and clear communication.
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Estefania Contreras
I wanted to share my excellent experience with this small, local company in the Southwest. Frédérick, the owner, personally handles the quotes, which is much appreciated. He presented us with several machines, taking the time to thoroughly explain each option. After receiving quotes from three companies, we quickly decided to go with them, both for the quality of their service and the clarity of their explanations. During the installation, there were two of them, and they did an absolutely outstanding job. They took care of the old machine and even cleaned their workspace with their own vacuum cleaner before leaving—a level of attention to detail that makes all the difference. Even my dog, Maria, supervised the whole process and trusted them, which speaks volumes! The entire installation took no more than three hours. Frédérick then took the time to explain all the features of the machine and the remote control in detail, including its self-cleaning function. We've already successfully tested the heating mode, and I'm really looking forward to trying the cooling mode. I'll definitely call you, Frédéric, to come and install the Wi-Fi system this summer! I recommend this company to everyone, without hesitation!
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Gab Zara
Excellent, fast, and professional service. They pay attention to detail. I highly recommend this company.
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Installation of an OUELLET Harmony 12,000 BTU heat pump in St-Constant

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