A Century-Old Home at Risk: Humidity as the Hidden Threat
In the heritage district of Laval-des-Rapides, a homeowner contacted us urgently in early May. His century-old home — a wooden architectural gem — was under threat from a dramatic spike in indoor humidity. Despite using portable dehumidifiers and household fans, the walls were turning black. The hardwood floors were warping, a persistent musty smell had settled in, and worst of all: mold was spreading, slowly but surely compromising the building’s structural integrity.
At AirGreen, we immediately understood that this home required a custom HVAC intervention, combining targeted dehumidification, smart ventilation, and suitable air conditioning. Such a project goes far beyond installing a wall-mounted heat pump: it’s about preserving heritage by ensuring an optimal moisture balance.
Expertise in Heritage HVAC: Our Approach in Laval
From the very first visit, our team conducted a thorough structural analysis: air infiltration from the attic, condensation in the basement, lack of airflow behind doubled walls. We identified three key intervention areas:
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Reducing ambient humidity.
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Restoring functional ventilation in high-risk areas.
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Integrating an energy-efficient, silent, and discreet air conditioning system.
Equipment Selection: Fujitsu KZAH R-32 – 12,000 BTU
We installed a Fujitsu KZAH R-32 wall-mounted heat pump – 12,000 BTU, perfectly suited for this residence’s needs:
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R-32 refrigerant: more eco-friendly, reducing global warming potential (GWP) by 67% compared to R-410A.
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Smart dehumidification mode: stabilizes relative humidity without overcooling rooms.
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Silent and compact: ideal for older homes with limited sound insulation.
This model integrates seamlessly into rooms without compromising aesthetics. Its seasonal efficiency (SEER of 26.5) ensures optimal performance while significantly lowering electricity consumption.
Strategic, Respectful Installation
Installation required a meticulous approach, including:
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No visible perforations on historic moldings or original walls.
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Concealed ducting through existing crawl spaces, preserving heritage materials.
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Integration of a Wi-Fi control system, enabling remote management and precise adjustments.
We also installed a compact heat recovery ventilator (HRV) to bring in fresh, filtered air while expelling stale, humidity-laden air.
Results and Comfort Impact
Within the first week:
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The humidity level dropped from 76% to 48% in the main living room.
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The musty odor disappeared.
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The clients regained stable thermal comfort, even during Laval’s heatwaves.
A month later, the homeowner confirmed that the woodwork had stabilized, the floor warping had stopped, and the indoor air was healthy again. The home is now eligible for a LogisVert rebate of $1,384, thanks to the installation of this Energy Star-certified high-efficiency unit.
Why Choose AirGreen in Laval?
Our expertise goes far beyond installing air conditioners: we analyze every project from a technical, aesthetic, and energy standpoint. Whether in heritage zones or modern neighborhoods, we intervene with precision, respect for the structure, and tailored solutions.
We serve the entire Laval area — from Pont-Viau to Sainte-Dorothée — offering solutions that suit both modern homes and historic residences.
Our Commitments:
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Comprehensive, free evaluation of your HVAC needs.
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Clear, customized technical proposals eligible for grants.
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Certified, discreet, and highly skilled installers.
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Responsive after-sales service focused on long-term satisfaction.
Expert Advice for Historic Homes
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Regularly check humidity levels with a digital hygrometer.
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Ensure continuous ventilation, even outside of summer months.
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Avoid inefficient portable systems: they move humidity without treating it.
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Entrust thermal and moisture diagnostics to certified professionals.
Conclusion: When Humidity Spells Emergency, AirGreen Delivers
In Laval, we proved that a well-designed HVAC intervention can not only protect a historic home but radically improve the well-being of its occupants. This success is the result of our technical know-how, our commitment to energy efficiency, and our dedication to indoor air quality.
Trust AirGreen for all your HVAC installation needs in Laval and surrounding regions.