Prefilter Replacement
1. Turn the unit off and
unplug it.
2. Remove the used prefilter
and carefully discard it in a plastic bag.
3. Line up the seam in the
prefilter with the receptacle at the back of the unit. Pull
the new prefilter over the unit so it snugly covers the
screen.
4. Plug the unit in and
turn it on.