Our complete flow hoods don’t come fitted with a pre-filter as standard.
If you want a pre-filter installed before shipping please order the appropriate size pre-filter with your unit and ask for it to be installed before shipping by writing in notes at the checkout.
*Models 31×31, 61×32, and 61×61 are all single intake fans, so we recommend ordering a 31×31 pre-filter and just sitting it over the fan intake, rather than installing it. It is much easier to clean from the outside. If you would like to do this, make sure you write in the comments section “Do not install pre-filter” so our staff knows not to do this, as they may assume if you order a 31×31 complete flow hood and pre-filter.