Filtration for the air coming in. Reusable foam HEPA filters and washable bug nets that fit over intake fans and duct openings.
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Why filter the intake
Every cubic foot of air the exhaust removes is replaced from outside, and outside air carries insects, mold spores, pollen and dust. Filtering the intake is the cheapest pest and pathogen prevention there is, because it stops problems before they enter the room.
Foam HEPA filters and bug nets
Foam HEPA filters push onto the end of a duct or flange and trap fine particles while passing plenty of air. They also protect air cooled reflectors from dust. Bug nets are fine mesh sleeves with an elastic opening and hook and loop strips that fasten over an intake fan. Both are washable and reusable.
Intake Filters FAQ
Will an intake filter reduce airflow?
Slightly. Size the intake larger than the exhaust, or use an intake fan, so the room keeps a slight negative pressure.
How often should intake filters be cleaned?
Check monthly and wash when visibly dirty. A clogged filter starves the room of air.
HEPA filter or bug net?
A bug net stops insects. A HEPA filter also stops dust and spores. Use HEPA where mold pressure is a concern.
