What are different types of grease filters?

There are basically three types of Grease Filters for Type 1 hoods: Baffle, High Velocity High Slot Cartridge, and Multi-Stage Filter. These filters range in price and efficiency depending on the manufacturer. The more economical baffle filters are available in aluminum or stainless steel construction. The cartridge filters are typically made in more durable stainless steel. The cartridge filter is also generally more efficient than the baffle filter.

All commercial kitchen type 1 hoods require grease filters that are Listed to the UL 1046 Standard.