When a Poor Air Conditioning Decision Becomes a $5,000 Expense
In the world of residential air conditioning in Longueuil, every decision matters. For this homeowner of a peaceful South Shore bungalow, that truth came crashing down hard. The story began with a common goal: to find an affordable and efficient wall-mounted air conditioner. But what seemed like a great deal turned into a $5,000 wasted investment. At AirGreen, we were called in urgently to fix the situation — and this job perfectly illustrates why choosing an expert in HVAC installation is a smart move, not a luxury.
The Beginning: No Permits, No Load Calculation, No Warranty
In 2022, this Longueuil client chose an independent installer found through a classifieds platform. Drawn by a rock-bottom price, he had a 12,000 BTU wall-mounted air conditioner installed, supposedly enough to cool the entire single-story home. No thermal load calculation was done. No municipal permit was obtained. The unit installed wasn’t Energy Star certified and didn’t qualify for the LogisVert grant. Two years later, the compressor failed… and the installer had vanished.
Full Diagnosis by AirGreen: Three Critical Mistakes
When we were contacted, the situation was dire: the unit was overheating constantly, making excessive noise, and failing to cool properly. We carried out a complete diagnosis and identified three common mistakes we unfortunately see far too often in Longueuil and elsewhere:
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Incorrect BTU capacity: The house needed at least an 18,000 BTU unit, not 12,000.
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Non-compliant drainage: Condensation was pooling near the foundation, causing water infiltration.
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Low-grade unit: The installed air conditioner was a generic model with no local parts supply, no service center, and no warranty recognized in Quebec.
Our Solution: A Custom, Energy-Efficient System with a 10-Year Warranty
At AirGreen, we recommended and installed a Gree Lomo R32 18,000 BTU wall-mounted air conditioner, designed to deliver optimal performance in medium-sized homes in Longueuil. This model stands out thanks to:
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An energy efficiency SEER rating over 20
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Ultra-quiet operation (< 23 dB)
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Eligibility for a $1,704 LogisVert grant
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A full 10-year warranty (parts and compressor)
The installation also included a certified installation process with:
✔️ personalized thermal analysis,
✔️ compliance with electrical standards,
✔️ insulated drainage piping,
✔️ eligibility verification for grants,
✔️ and permit filing with the City of Longueuil.
Final Result: A Cool Home, Lower Electricity Bills, and a Relieved Client
After our work, the homeowner immediately noticed stable indoor temperatures, even during heatwaves. Even better, their electricity bill dropped by 18% in the very first month, thanks to the R32 refrigerant’s efficiency and a properly sized unit.
What You Need to Know Before Installing a Wall-Mounted Air Conditioner
Don’t Just Focus on the Upfront Price
A poorly done HVAC installation can lead to major hidden costs: repairs, early replacements, humidity issues, and even mold. A low price doesn’t guarantee comfort or durability.
The Right Unit for the Right Home
Every home is unique. A proper thermal load assessment is essential to determine the correct BTU capacity. Oversizing causes excessive energy use and discomfort, while undersizing overworks the system and shortens its lifespan.
Choose a Certified Installer
At AirGreen, all our installations are carried out by technicians certified according to RBQ and CMEQ standards. Every project in Longueuil, Montréal, Laval, the North Shore, or the South Shore is supported from start to finish — from quote to post-installation service.
Client Testimonial
“I thought I was saving $1,000, but I lost $5,000 instead. Thankfully, the AirGreen team took over the entire project with professionalism. My house is finally comfortable, and I regret not calling them in the first place.” – François L., Longueuil
What a Good Residential Air Conditioning Service Includes at AirGreen
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Free home evaluation
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Personalized thermal study and expert advice
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Selection of the ideal wall-mounted air conditioner or heat pump
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Clear, detailed quote
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Complete management of available government grants
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Certified professional installation
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Fast, local after-sales service
Why Choose AirGreen in Longueuil for Your Air Conditioning Needs?
We’re experts in HVAC for both residential and commercial properties, with unmatched field experience in Longueuil, Boucherville, Brossard, and across Greater Montréal. We work exclusively with trusted brands: Gree, Lennox, Fujitsu, Midea, and more. Every project is treated as if it were for our own home.
Don’t let a rushed decision cost you $5,000. Take the time to speak with our experts. One call, a free quote, and your comfort is in good hands.