Abatement Technologies PRED750 Filter Starter Kit ERV Filters This Daikin Kit is an UV Water Purifiers This Daikin Kit is an OEM Kit for the following Daikin QUATERNITY mini split Indoor Units: FTXG09HVJU Separate Pre Filter Compartments Less bypass F621 × 12 1st stage coarse pre filter 15 1 2" × 16" × 1" FIBER TRAPPER® — captures large particles before they reach the pleated and HEPA stages change monthly H502 × 6 2nd stage pleated pre filter 16" × 16" × 2" MERV 8 — captures medium particles and protects the HEPA filter change every 2 months under normal conditions High particulate environment Approximately every 72 hours Medium particulate environment 3× per month Low particulate environment Monthly or when filter indicator light activates Use only Abatement Technologies OEM replacement filters to maintain equipment warranty and rated performance