Aluminum Hood Filters - Code Deficiency During your most recent kitchen exhaust cleaning service, our technicians noted that at least one of your hood filters need to be replaced per NFPA 96: 6.2.3.3. Grease filters shall be of rigid construction that will not distort or crush under normal operation, handling, and cleaning conditions Hood filters are a crucial component of your exhaust system and required by NFPA. It is important they are not broken or damaged to prevent excess grease from getting into your ductwork and to prevent fires. The proposal below is all-inclusive and includes all parts and shipping costs. You can accept this proposal electronically or contact me directly. All quoted services/parts are installed/completed upon our next kitchen exhaust cleaning unless requested to be completed earlier. Due to constant price changes in the industry, the quoted price is only guaranteed for 14 days. Quotes approved after the 14 days may be subject to a price increase. Thanks f