Metal mesh filters are great pre-filters for outside air intakes of any outdoor HVAC system. They are commonly used in HVAC systems, kitchen range hoods, and heavy-duty machinery where high airflow and durability are necessary. Popular applications include economizer hoods of return air (RTU) and make-up air (MUA) rooftop units. Metal mesh filters are constructed from layers of aluminum, stainless steel, or galvanized steel mesh. These filters provide excellent durability and can withstand extreme conditions, making them ideal for industrial and commercial applications. They can be cleaned using water or a mild detergent and are designed to last for years with proper maintenance.