There are, however, some exceptions. Utility fans, for example, are configured in such a way that there is no place for a Grease Gutter to be installed. Some fans have obstructions that make a Grease Gutter installation very difficult. On rare occasions, a fan will spew grease beyond the coverage area of a Grease Gutter. Roofs with fans like these need protection from grease, too. Omni’s R & D experts put their minds to the problem and came up with a new design: the Roof Guardian.
Basically, the Roof Guardian consists of an outer frame with metal slats across it. The slats are there to support the filter media inside which actually does the job of soaking up the grease and oils. The filters are hydrophobic, which means that water (precipitation) passes through. This feature keeps the filters from becoming saturated with the first rainfall. Our multi-layer filter system absorbs fats, oils, and grease, but not rain!