When performance and comfort are compromised: understanding and fixing the weaknesses of ducted systems in Longueuil
In Longueuil, many homes and businesses rely on their ducted HVAC system to provide centralized, discreet, and efficient climate control. However, despite its many advantages, this type of installation can sometimes present technical issues that negatively affect overall system performance, indoor comfort, and energy efficiency. At AirGreen, we regularly intervene throughout the Longueuil area to solve these issues—often caused by poor installation or natural wear. Here is an overview of the four most common problems found with ducted systems, along with practical, long-lasting solutions we implement to restore optimal performance.
Duct leaks: efficiency loss and higher costs
One of the most widespread issues we see in HVAC installations in Longueuil is air leakage within the ducts. These leaks typically occur at poorly sealed joints, system elbows, or in neglected duct sections.
Direct consequences:
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Loss of conditioned or heated air, reducing energy efficiency.
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Increased strain on the central air conditioner or heat pump.
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Significant increase in electricity bills.
Our solution:
At AirGreen, we use pressure-based leak detection technologies and smoke tests to accurately locate problem areas. Then, we apply specialized sealants (high-performance mastic or metal tapes) to close the leaks. In some cases, a duct realignment is also necessary to ensure perfect sealing. These corrections allow homeowners to recover up to 30% of lost efficiency.
Unusual noises in the ductwork: signs of poor installation or deterioration
A dull noise, clicking, or whistling in the ducts can disrupt the acoustic comfort of a residential or commercial space. This issue is particularly common among our clients in single-family homes in Longueuil or small buildings where ducts run close to living spaces.
Common causes:
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Incorrect duct sizing.
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Loose or insufficient fastening.
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Obstruction or buildup of dust and debris.
Our approach:
We inspect each section of the system, verify the airflow calibration, and perform a revision of the duct anchoring. In some cases, adding acoustic insulation greatly reduces noise levels. A complete cleaning of the system is often required to remove debris and restore smooth, silent operation.
Thermal performance loss: a warning sign for energy-conscious users
Homeowners who closely monitor their energy usage sometimes notice a gradual decline in performance, even when their HVAC system usage remains consistent. This shows up as less effective heating or cooling, longer response times, and uneven temperature across different rooms.
Possible diagnosis:
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Faulty or missing thermal insulation on ducts.
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Condensation buildup.
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Dirty coils and grilles.
AirGreen intervention:
We replace or add high-density thermal insulation around exposed duct sections (basements, attics). At the same time, we carry out a thorough cleaning of internal components and, if necessary, replace corroded or porous sections. This kind of intervention has helped several of our clients in Longueuil reduce their electricity consumption by 15 to 25%.
Uneven air distribution: localized discomfort and thermal imbalance
Some areas of the home receive too much air, while others seem to be neglected by the system. This uneven air distribution is often related to a poorly balanced ducted system.
Notable symptoms:
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Strong drafts in certain rooms.
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Unstable temperature from one room to another.
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Persistent sensation of cold or heat despite settings.
Our corrective actions:
We perform a professional system balancing using anemometers and infrared sensors. We adjust the registers, install motorized dampers if necessary, and reconfigure the plenum for even distribution. Our clients in Longueuil report noticeable improvement in ambient comfort just hours after the intervention.
Case study: AirGreen intervention in a residential bungalow in Longueuil
During a recent visit to a bungalow in Longueuil, our team was called in for a constant noise issue and poor heating in basement bedrooms. After a full inspection of the duct network, we found that multiple joints had major leaks, and the insulation on ducts running through the slab was completely deteriorated.
Our solution:
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Full sealing using aluminized mastic.
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Replacement of 12 meters of damaged ductwork.
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Addition of high-density reflective thermal insulation.
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Airflow calibration and balancing.
Result: the rooms are now well heated, the system runs quietly, and the Hydro-Québec bill dropped by 18% the following month.
Why choose AirGreen for your ducted system in Longueuil?
At AirGreen, we combine technical expertise, custom diagnostics, and long-term solutions for all types of HVAC installations. Our teams respond quickly throughout Longueuil, Montréal, Laval, South Shore and North Shore, with precision tools and strict protocols to ensure optimal energy performance and lasting comfort.
We also offer customized preventive maintenance contracts, designed to detect signs of failure before they become serious issues.
Key takeaways: how to prevent ducted system issues?
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Have your ductwork inspected every 2 to 3 years by a certified professional.
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Never ignore abnormal noises or declining performance.
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Make sure your duct network is well insulated, especially in unheated areas.
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Invest in a balanced system configured for your home’s specific needs.
AirGreen: your trusted HVAC partner in Longueuil and beyond
Every intervention we carry out is a chance to showcase our professionalism, technical precision, and commitment to our clients’ comfort. Whether you're facing air leaks, uneven airflow, duct noises, or reduced system performance, our team is ready to assist you with concrete, fast, and effective solutions.