Fungal nail infections can be caused by three different types of fungus, alone or in combination. 1  Dermatophytes are a type of fungus that can grow on the skin, hair, and nails. 2  They don't invade the deeper tissues of the body. 3  The most common dermatophyte, Trichophyton rubrum, causes most cases of athlete's foot.
Negative Airflow. Negative airflow is the opposite of postive airflow its having more exhaust fans then intake fans, this is good because its always taking new air into the case, but then you have more dust because the intake is mostly coming from gaps in the case and then causing trapped air.
Dri-Eaz HEPA 500 Negative Air Machine. The Dri-Eaz DefendAir HEPA 500 Negative Air Machine is a portable filtration system that draws air in from the surrounding environment and passes it through an advanced filtration system.The unit removes airborne particles like dust, mold spores, pollen, pet dander and miscellaneous debris.he Dri-Eaz DefendAir HEPA 500 Negative Air Machine is a portable filtration system that draws air in from the surrounding environment and passes it through an advanced filtration system.