Pulse-Bac 2450 Bagger uses Pulse-Bac’s Automatic Pulse-Clean technology, complying with the 2017 OSHA regulations that require a “back flush filter cleaning cycle” when using vacuums with materials that contain Silica. This technology keeps the filters clean and clear, so suction stays consistent. The fully automatic system features HEPA filtration that does not require the user to stop work to push a button or shake a plunger; there is no disconnecting the hose to seal the vacuum inlet and no compressor or other equipment to add extra weight.