With the heating season upon us, it is time to replace the furnace filter to minimize the air pollution from being recirculated in the home.
Below are the most common questions I get asked about furnace filters.
What is the function of the furnace filter?
The furnace filter’s function is to trap pollutants and debris from the air, so that they don’t get distributed in the home through the forced-air system.
How are filters rated for effectiveness?
The Minimum Efficiency Reporting Value measures the filter’s effectiveness in trapping and filtering airborne pollutants. The MERV ratings range between 1 and 20. The higher the rating, the higher the effectiveness of the filter. The higher the rating, the smaller the particle sizes that are filtered. The particle sizes are measured in microns.
Which is the best MERV rating for my family’s needs?
• MERV 8 This filter should be the absolute minimum used in any home. It removes 85% of particles sizes 3-10 microns. • MERV 12 This filter is a good choice for a home with pets and people with allergies, as it traps the fine animal dander. It removes up to 90% of particles sizes 1-3 microns. • MERV 16 This filter traps airborne bacteria and viruses. It is essential in the cases of people with asthma and other respiratory concerns. It removes over 95% of particles sizes 0.3-10 microns.
Out of so many types and fabrics of filters, which one is the best one for use at our home?
• Washable filter is a good option. As the name states, it is washable and can be reused. This benefits our pockets and the environment. It is made of woven fabric or mesh. The drawback is that the maximum MERV rating it reaches is up to MERV 8. • High Efficiency Particulate Air filter or HEPA is the right choice when higher MERV rating is required. This is a pleated mechanical filter, which traps small particles (dust, pollen, mold, bacteria) and prevents them from being circulated in the home. This type of filter is more costly than the washable filter.
How often should we replace the filter?
• During the active heating season, filters should be replaced every three months to keep the air pollutants from being spread throughout the home. • In the cases, where respiratory issues are present additional filtration and purification may be needed.
The main takeaway is that in order to breathe clean air at home, we need to select an appropriate filter and replace it regularly.
Have a happy and healthy Fall/ Winter season and enjoy your Holistic Home!
Learn more about “What we need to know about Lead in the Home and our Health?” in this guide: https://www.holistichomesarchitecture.com/guide-what-we-need-to-know-about-lead-in-the-home.html
Drop me a line to prepare your Home for Winter! Ana Ana Koleva Miller, RA, NCARB, Fitwel Amb.