Insufficient Rooftop Containment - Code Deficiency During your most recent kitchen exhaust cleaning service, our technicians noted that one or more of your rooftop exhaust fans need a grease containment system to prevent roof damage and fires. NFPA 96 8.1.2.3 Rooftop containment systems are a crucial component of your exhaust system and required by NFPA. It is important that your roof surface is free of grease to prevent fires and costly roof damage. The proposal below is all-inclusive and includes all parts (including 1st set of filters) and labor. These filters are swapped during each service at $59.50 per filter. 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