Which wall-mounted heat pump should you choose to face Québec’s harsh winters? LG or Bosch?
At AirGreen, we’ve been helping families and property managers across Montréal, Laval, Longueuil, the North Shore, and the South Shore for years with their wall-mounted heat pump installation projects. Among the most popular brands we frequently install are LG and Bosch, two giants offering high-performance units with very different philosophies. To help you make an informed decision tailored to your climate, budget, and energy goals, we’ve conducted a detailed technical analysis—and more importantly, based our comparison on real-life installation cases carried out by our AirGreen experts.
Understanding Québec’s Climate Context
The Québec climate is one of the toughest in North America. The wall-mounted heat pumps installed in our region must operate efficiently not only during hot summer waves but especially during long stretches of severe cold, where temperatures can drop below -25°C, even -30°C. It’s in this context that the duel between LG and Bosch truly comes to life.
Overview of Both Brands: Distinct Strengths and Philosophies
LG: Technology, Discretion, and Connectivity
The LG Art Cool wall-mounted heat pump and its variants are popular for their sleek design, quiet operation, and smart connectivity via the ThinQ app. LG focuses on user experience and precise temperature control thanks to a reliable Inverter compressor.
Bosch: Ruggedness, Winter Performance, and German Reliability
Bosch, with models like the Bosch Climate 5000 or wall units compatible with the IDS Premium system, positions itself as a leader in thermal performance in cold weather. The use of the new R-454B refrigerant in certain units further increases their energy efficiency while lowering their environmental impact.
Case Study #1: Installation of an LG Art Cool Mirror 12,000 BTU Wall-Mounted Heat Pump in Boucherville (South Shore)
A retired couple was looking for an efficient heating solution for their single-story bungalow. Their priority: a quiet and aesthetically discreet unit. We recommended the LG Art Cool Mirror model, known for its elegant design and operation at just 19 dB in sleep mode.
Challenges encountered:
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Wall placement in a minimalist living space
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Need for discreet refrigerant line routing
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Partial insulation in some sections of the home
AirGreen solutions:
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Optimized installation near the home’s core for even distribution
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Line routing through the crawl space to preserve aesthetics
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Fine-tuned sensor adjustments for consistent temperature across all rooms
Result: constant thermal comfort, reduced electrical consumption, and excellent customer feedback on how harmoniously the system blended into the home.
Case Study #2: Installation of a Bosch 18,000 BTU Wall-Mounted Heat Pump in Sainte-Thérèse (North Shore)
A family of four wanted to replace an old wall-mounted AC with a more powerful system that could also serve as the main heating source during winter. Our team suggested the Bosch wall-mounted heat pump, capable of maintaining its performance down to -30°C.
Challenges encountered:
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Poorly positioned old unit with bad airflow
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Outdated electrical circuit not up to code
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Need to cover a larger area of the house
AirGreen solutions:
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Installation of a more powerful 18,000 BTU unit
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Added dedicated circuit with safety breaker
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Strategic placement in the central hallway of the ground floor
Result: stable heating even during deep freezes, a 35% drop in winter electricity costs, and a significant comfort improvement throughout the house.
Technical Comparison: LG vs Bosch
| Specifications | LG (Art Cool) | Bosch (Climate / IDS) |
|---|---|---|
| Available BTU sizes | 9,000 to 24,000 | 9,000 to 24,000 |
| Indoor noise level | 19–42 dB | 26–45 dB |
| Minimum operating temperature | -20°C | -30°C |
| SEER (cooling) | Up to 23 | Up to 22 |
| HSPF (heating) | Around 11 | Up to 13.5 |
| Refrigerant | R-32 | R-410A or R-454B (model dependent) |
| Design | Modern and discreet | More classic |
| Mobile app | LG ThinQ | Bosch HomeCom Pro |
Our Recommendation Based on Customer Profiles
For open living spaces, tech enthusiasts, or moderate heating needs:
LG is a great choice for customers looking for design, minimal noise, and smart connectivity. Perfect for condos, apartments, or small to medium-sized homes.
For larger families, multi-level homes, or cold-exposed areas:
Bosch stands out for its robustness and ability to efficiently heat during extreme cold. Especially recommended on the North Shore or in more exposed sectors.
Available Rebates for LG and Bosch
In both cases, LG and Bosch wall-mounted heat pumps are eligible for rebates under the Hydro-Québec LogisVert program, with potential savings of up to $2,172, depending on the model, power, and energy performance.
At AirGreen, we assist our clients free of charge throughout the rebate application process, from validation to final submission.
Why Trust AirGreen for Your Installation?
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On-the-ground expertise with hundreds of installations across Montréal, Laval, Longueuil, the North Shore, and the South Shore
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Certified and experienced team in HVAC
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Tailored support to select the right capacity, model, and optimal placement
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Reliable after-sales service and customized maintenance contracts
Practical Tips Before You Choose
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Assess your priorities: winter comfort, noise level, aesthetics, or energy savings?
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Get a home inspection: an AirGreen technical visit will help determine the right capacity.
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Consider your budget and available rebates in your area.
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Plan for maintenance: both brands require annual maintenance to preserve performance and ensure long-term reliability.
Conclusion: Bosch or LG, Which Is the Better Choice?
There’s no one-size-fits-all answer. The best choice depends on your home, your lifestyle, and your expectations. At AirGreen, we believe every installation is unique, which is why we carefully guide you through the selection, installation, and maintenance of your wall-mounted heat pump, whether it’s LG or Bosch.
Book your free, no-obligation evaluation with one of our HVAC specialists today.