When was the last time you changed your vacuum filter?
I know this sounds like an odd question, but it’s an important one. I’m also guilty of letting this filter go for too long. Just like our HVAC filters, the HEPA filter in your vacuum cleaner needs to be changed on a regular basis. A HEPA filter actually works better when it has a thin, caked-on layer of collected particles, but at some point, air will have a hard time getting through the filter, which makes the vacuum motor work harder. (Can You Clean a HEPA Filter? Here's What Air Quality Experts Have to Say)
First of all, let’s review what HEPA stands for. According to the EPA, HEPA is a type of pleated mechanical air filter. It is an acronym for "high efficiency particulate air [filter]"... This type of air filter can theoretically remove at least 99.97% of dust, pollen, mold, bacteria, and any airborne particles with a size of 0.3 microns (µm). The diameter specification of 0.3 microns corresponds to the worst case; the most penetrating particle size (MPPS). Particles that are larger or smaller are trapped with even higher efficiency. Using the worst case particle size results in the worst case efficiency rating (i.e. 99.97% or better for all particle sizes). 0.3 microns includes common allergens like dust, pollen, and pet dander, as well as smaller particles like bacteria and viruses.
You may think, these filters are expensive… why can’t I just clean them? Experts say HEPA filters should always be replaced rather than cleaned, unless the HEPA filter has a label that says "washable." "You cannot clean a [standard] HEPA filter by using something like a vacuum because the particles are trapped not only on the surface of the filter but also deep inside the media," says air quality expert John Bloemer from AprilAire. Don't even think about running it under your sink, either—liquids like water and soap will destroy the filter media, he adds. Only filters labelled “washable” by the manufacturer can be effectively washed.
Ok, so when do I change it? Most manufacturers recommend changing the HEPA filter in your vacuum every 6 to 12 months, but this also varies by cleaning frequency and duty. If you have pets or live in a very dusty area (for example, near a construction site or someone is making renovations to your own home)--consider checking and possibly replacing it at 3 months. You can tap it over a garbage can to get a few more cleanings out of it, but don’t be fooled–the filters have a timeline for a reason, and the vacuum is designed to function with a working filter! Since it’s hard to remember exactly when you may have changed it before, I like to write the date on the edge of the filter with a permanent marker, and set a reminder on my phone to check it in 3 months. This tip works for HVAC filters too!
Photo by No Revisions on Unsplash
