Towards the outlet, a wad of woven vetiver and coir filters, moistened by a fine
spray of water from a nozzle above, traps any additional air contaminants, and
help cool the air , similar to the function of an evaporative air cooler. These
filters will last upto 2 months, and require replacement to prevent the growth of
mold. These filters can simply be removed and be buried in soil to compost.