A Variation on the “Box Fan with MERV 13 Filter” Air Cleaner

The “Box Fan with a MERV 13 Filter” air cleaner is an easy-to-assemble, inexpensive and effective way to improve indoor air quality and to reduce exposure to Covid-19. The concept is really simple – attach an effective air filter to a box fan and clean the air. This article gives more details about the construction … Continue reading A Variation on the “Box Fan with MERV 13 Filter” Air Cleaner