There can be various reasons why airflow from vents in the house is weak. One common cause is a build-up of dirt and dust in the vents and ducts. It is estimated that over the course of a normal year, several pounds of dirt, dust, pollen, and other debris can accumulate inside your...
WPM in packed and sealed containers is at risk of contamination if organisms enter the container via cracks or air vents (Koch and Galvan 2008; Lee et al. 2014). The risk of contamination varies with the length of time the containers are present in the exposed environment, the population ...