MERV Ratings: The Ultimate Guide for Homeowners

The quality of indoor air is essential for maintaining good health, especially for those who spend extended periods indoors. Airborne pollutants, such as dust, pollen, and bacteria, can cause respiratory problems and exacerbate allergies. This is where air filters come into play. They capture these particles and improve the air quality of your home. MERV ratings are a crucial factor to consider when selecting air filters.

In this comprehensive guide from your trusted HVAC contractor in Edmonton and Calgary, we will explore everything you need to know about MERV ratings:

What Are MERV Ratings?

MERV stands for Minimum Efficiency Reporting Value. It is a standard rating system that evaluates the effectiveness of air filters. The ratings range from 1 to 20, with 1 being the lowest and 20 being the highest. The higher the MERV rating, the more efficient the air filter is at capturing airborne particles.

How Are MERV Ratings Determined?

MERV ratings are determined by measuring the particle size range that an air filter can capture. The test involves exposing the filter to particles of various sizes and measuring the number of particles that pass through the filter. The higher the percentage of the particles captured, the higher the MERV rating.

What Do MERV Ratings Mean?

MERV ratings give homeowners a general idea of how well an air filter can capture airborne particles. Filters with a MERV rating between 1 and 4 are considered low-efficiency filters and can capture only the biggest particles, such as dust mites and carpet fibers. Filters with 5 to 8 MERV rating are medium-efficiency filters and are effective at capturing smaller particles like mold spores and pet dander. Filters with a MERV rating of 9 to 12 are high-efficiency filters and can capture even smaller particles like smoke and bacteria. Filters with a MERV rating of between 13 and 20 are the highest-efficiency filters and can capture the smallest particles, such as viruses and odors.

What MERV Rating Should You Choose?

The MERV rating you choose depends on your specific needs. If you have pets or allergies, you should consider a filter that has a higher MERV rating. If you have a respiratory condition, a filter with a MERV rating of at least 11 is recommended. However, it is important to note that filters with a higher MERV rating can restrict airflow and add a strain on your HVAC system. It is recommended to consult with an HVAC professional before selecting an air filter.

What Are the Benefits of High MERV Rating Filters?

High MERV rating filters have several benefits. They can capture a wide range of airborne particles, including those that can cause health problems. They can also improve the air quality of your home and reduce the amount of cleaning required. Additionally, they can extend the lifespan of your HVAC system by preventing particles from building up and causing damage.

What are the Drawbacks of High MERV Rating Filters?

High MERV rating filters can have some drawbacks. They may restrict airflow and put a strain on your HVAC system, which can increase energy costs. They may also require more frequent replacements than lower MERV rating filters, which can be more expensive in the long run.

Conclusion

MERV ratings are a crucial factor to consider when selecting air filters for your home. The higher the MERV rating, the more efficient the filter is at capturing airborne particles. However, it is important to select a MERV rating that is appropriate for your specific needs and to consult with an HVAC contractor before making a decision.

High MERV rating filters can improve the air quality of your home, but they can also have some drawbacks. By understanding MERV ratings, homeowners can make informed decisions and enjoy the benefits of improved indoor air quality.

Legacy offers HVAC maintenance and repair services for residential new home construction, including installation and replacement of furnaces, air conditioners, air cleaners, thermostats, humidifiers, heat recovery ventilation (HRV) units, and unit heaters. We also offer a variety of other HVAC products and services to meet your needs. Ask us about our services and products!