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Selecting and replacing air filters

Writer's picture: RG LegaultRG Legault

Choosing the right air filter for your ventilation system is essential to ensuring optimal air quality, extending the life of your equipment and maintaining energy efficiency. Here are the steps and criteria to consider when selecting your air filter.


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Understand how to choose an air filter


Dimensions and compatibility:

  • Make sure the filter dimensions match those of your system. The exact measurements are usually listed on the filter itself.

  • Check thickness, length and width to ensure optimal fit.


Types of filters:

  • Mechanical filters: These filters, often used, capture particles with fibers. HEPA (High Efficiency Particulate Air) filters are a good example, capturing at least 99.97% of particles 0.3 microns or larger.

  • Electronic filters: Use electrostatic charges to attract and capture particles.

  • Activated carbon filters: Specially designed to eliminate odors and gases.


MERV (Minimum Efficiency Reporting Value) Index:

  • The MERV rating evaluates a filter's effectiveness in capturing particles of different sizes.

  • Filters with high MERV ratings capture finer particles, but can also reduce airflow, impacting the energy efficiency of the system.

  • For the majority of homes, a filter with a MERV rating between 7 and 12 is usually sufficient.


Replacement frequency:

  • Consult the manufacturer's recommendations regarding how often to replace or clean the filter. Some filters can last several months, while others, like HEPA filters, require more frequent replacements.

  • We recommend changing the filter every 9 to 12 months.



Frequently asked questions


How often should I clean the air cleaning filter?

  • It is recommended to clean the filter every 3 months. Consult the manufacturer's manual for specific instructions.


What is a “catechin air filter”?

  • Catechin, a bioflavonoid found in green tea, has antiviral and antioxidant properties. In addition to these benefits, it offers excellent deodorizing properties. Air filters using this substance improve air quality and prevent the proliferation of bacteria and viruses.


What product should I use to clean the device?

  • Use only mild detergent diluted with water.


Other points to consider:


Energetic efficiency :

  • The choice of a filter must take into account its impact on the energy efficiency of the system. A filter with a high MERV rating can reduce airflow and increase energy consumption. It is therefore essential to find a balance between filtration quality and energy efficiency.


Allergens and health:

  • People with allergies or respiratory problems may benefit from HEPA or high-efficiency filters because they better capture allergens and other fine particles.


Reusable or disposable filters:

  • Reusable filters, although requiring regular maintenance, can be more economical in the long run.

  • Disposable filters, despite more frequent replacements, often provide consistent performance without maintenance.


Tips to extend the life of your air filter:

  • Make sure your ventilation system is working properly and that there are no air leaks.

  • Maintain a clean environment to reduce the amount of dust and debris captured by the filter.

  • Use additional air purifiers in high traffic areas to ease the load on the main filter.


Conclusion :

Properly choosing and maintaining your air filter is crucial to maintaining a healthy indoor environment and extending the life of your ventilation system. By following the tips above, you can make an informed choice that meets your specific needs and ensures optimal air quality in your home.

For personalized advice, do not hesitate to contact the experts at R&G Legault Inc. We are here to help you make the best choices for your comfort and health.

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