Room Air Filter Ratings

Experts weigh in on the efficacy of air purifiers and what to consider before buying one in 2020.

Room air filter ratings.

Air purifiers made for small rooms cannot purify large rooms. Merv filter ratings and efficiency. Medify ma 40 air purifier. For example an air purifier with a 4x ach rating means that the unit can swap the existing room air with clean air four times every hour or every 15 minutes.

Similar to coway s airmega this model also has an led light that constantly indicates. It circulates the air in the room over. This model is designed for medium sized rooms about 155 square feet and features a true hepa filter for guaranteed removal of 99 97 percent of airborne particles down to 3 microns. Covers 840 square feet.

When purchasing an air purifier ensure that the device fits the room space. Join a community of millions of consumers. Ach rating this abbreviation stands for air changes per hour and this rating tells you how often the air purifier can exchange the full volume of air inside a room. Human hair has a diameter of 100 microns.

To test air purifiers we inject smoke and dust particles into a sealed chamber and measure how well each model removes particles between 0 1 and 1 micron. The blue pure 211 is highly rated for its solid performance in removing dust smoke and pollen from room air. This powerful air purifier tackles pollutants of all types making the room it s placed in a much healthier environment. Get our expert independent ratings and reviews trusted reporting plus tools to help keep you.

In general filters with a rating of merv 16 or below are considered to be hvac system grade filters for residential commercial and general hospital use. What makes this product so good is the 4 stage air cleaning system with one of the highest grade hepa filters available. The blueair s filters aren t true hepa certified but they are still effective. Merv 17 through merv 20 filters are typically used in surgical operating rooms clean rooms and other contexts that require absolute cleanliness.

Given a clean air delivery rating. Room air purifiers ratings.