When it comes to removing particles from the air, you need a filter that is up to the task. The efficiency of filters is measured by the Minimum Efficiency Report Value (MERV). The best filters have a MERV rating of 13 or higher. The Blueair Classic 680i is one of the best air purifiers for smoke, with its impressive specifications and complete filtration system.
MERV 8 filters are not recommended for residential HVAC systems, according to ASHRAE. While MERV 8 filters are effective at filtering out contaminants such as pollen, dust mites, sawdust, mold spores, and lint, higher MERV ratings will do an even better job. For example, MERV 13 filters can also remove bacteria, tobacco smoke, car fumes, insecticide dust, pet dander, and more. The MERV rating (1 to 20) indicates the smallest particle size that an air cleaner can filter.
The higher the rating, the more effective the filter is at trapping small particles. Filter technology has advanced significantly over the years and MERV ratings help us determine which filter is best for our heating and cooling systems. When selecting a filter for your HVAC system, it's important to choose one with the highest possible MERV rating that your system can handle. If your system can't handle a MERV 13 filter, opt for one with the next highest rating.
Filters with a MERV rating of 17 to 20 are typically used in operating rooms and other settings that require absolute cleanliness. ASHRAE recommends using a filter with a MERV rating of 13 or 14. It's important to note that using an air filter with a higher MERV rating than recommended by your oven or air conditioner's manufacturer may impair its performance. Be sure to check the manufacturer's recommendations before selecting a filter for your HVAC system.