A HEPA filter can remove dust particles down to what range of microns?

A HEPA (High-Efficiency Particulate Air) filter is specifically designed to capture a very high percentage of airborne particles, including dust. The standard for a true HEPA filter is that it must remove at least 99.97% of particles that are 0.3 microns in diameter, which is referred to as the most penetrating particle size (MPPS). However, HEPA filters are also effective at capturing larger particles as well, including dust particles that fall within the range of 1 to 3 microns.

Given this, the range of microns that HEPA filters can remove effectively includes the smaller end of this spectrum down to 0.1 microns and extends to particles larger than 3 microns. While the question specifies a range, the correct answer indicates that HEPA filters can handle dust particles starting from 1 micron, which aligns with common understandings of their efficacy in air filtration. Hence, the selection accurately reflects the type of particles that HEPA filters can eliminate from the air, particularly in relation to dust and other common pollutants.