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Replaces OEM part numbers: 30-3506
Description
Replacement for 30-3506: 20" x 24" x 29" 65% (MERV 11) fiberglass bag filter with loops, 8 pockets. This is the standard-efficiency bag in the 20 x 24 x 29 size, for general shop dust. For weld smoke and fine fume, the 95% (MERV 15) bag in the same size is SKU 50457, the main filter for the Trion M-26 and M2000. Air King's current M-35P ships with a 30"-deep bag (95%: SKU 50463), so measure the depth of your old bag before you order. Specifications: • Size: 20 x 24 x 29 in. • Efficiency: 65% (MERV 11) • Media: fiberglass, 80 sq ft • Pockets: 8 • Filter ends: loops • Temperature rating: 200°F • Stage: main filter Fits: • Air King M35P A 20 x 24 x 4 pre-filter goes ahead of the bag; our pleated MERV 8 pre-filter in that size is SKU 50822 (6 per case). Install with the pockets pointing downstream and hanging straight, without folds, behind the pre-filter, and replace it when your gauge reaches the change point or airflow drops. Price shown is per filter; sold in pairs (minimum order 2).
Specifications
Temperature Rating (°F) Temperature Rating (°F) The maximum operating temperature the filter can safely withstand without degrading performance or structural integrity. | 200 |
Substitute For Substitute For Identifies alternative or equivalent part numbers that this filter can replace in compatible systems. | 30-3506 |
Filter Ends Filter Ends The design and configuration of a filter’s end caps or closures, which determine how the filter is sealed and mounted in the system. | Loops |
Media Surface Footage (Sq') Media Surface Footage (Sq') The total surface area of the filter media, measured in square feet, which affects airflow capacity and dust-holding performance. | 80 |
Dimensions Dimensions The filter's size in inches (for media rolls, the length is in feet). Panel and bag filter sizes are nominal, so the actual filter can measure slightly smaller. | 20x24x29 |
Filter Efficiency (%) Filter Efficiency (%) The percentage of particles a filter can capture from the air, indicating how effective the filter is at removing contaminants. | 65 |
MERV MERV A standardized rating (Minimum Efficiency Reporting Value) that indicates how effectively a filter captures airborne particles, with higher values representing finer filtration. | 11 |
Media Type Media Type The material or composition of the filter media, which determines filtration efficiency, durability, and application suitability. | Fiberglass |
Filter Stage Filter Stage Where the filter sits in your collector: a pre-filter catches larger particles first, the main filter does most of the filtering, and an after-filter is the final stage. | Main |



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