Specifications include, but are not limited to: Clean ductwork and RTU’s for all rooftop and interior air system HVAC units at West Avenue School and Quarter Mile Lane School. Clean all Unit Ventilators, Bathroom Exhaust and hallway units and clean coils, blower assemblies, condensate pans and traps on all units at Indian Avenue School, Cherry Street School, West Ave. School, Quarter Mile Lane School. Remove all air filters and dispose of same. Install new MERV 11 pleated filters as supplied by the district. Cleaning – Methodology Perform HVAC system cleaning in accordance with ACR, THE NADCA Standard. Remove visible non-adhered particulates. Clean HVAC components employing agitation device to dislodge contaminants from HVAC component surface, and then capturing contaminants with vacuum collection device. Acceptable methods include those that do not damage integrity of ductwork and other system components, and does not damage porous surface materials including internal insulation and duct lining. Clean HVAC components using source removal mechanical cleaning methods designed to extract contaminants from within HVAC system and safely remove contaminants from facility. Select source removal methods rendering HAVAC system visibly clean and capable of passing cleanliness verification methods as described in ACR, THE NADCA Standard. Do not employ cleaning method, or combination of methods, that can damage HVAC system components or negatively alter system integrity. Do not damage HVAC system and components with wet cleaning, power washing, steam cleaning and other wet process cleaning. Apply cleaning materials in accordance with manufacturer’s instructions. Do not apply cleaning agents or water to electrical, fibrous glass or other porous HVAC system components. Capture removed contamination and cleaning materials and legally dispose. Verify HVAC system surface and component cleanliness in accordance with NADCA Standard. Particulate Collection: Employ contaminant removal methods incorporating vacuum collection devices operated continuously during cleaning. Connect vacuum collection device to component being cleaned through service opening. Employ vacuum collection device of sufficient capacity to maintain areas being cleaned under negative pressure, containing debris is contained and preventing contaminant migration to adjacent areas. When possible, discharge ducted exhaust air from vacuum collection devices outdoors, keeping discharge air clear of outdoor air intakes, operable windows, and other locations allowing outdoor air entry: Do not violate outdoor environmental standards, codes or regulations; Do not discharge unfiltered air from vacuum collection devices outdoors. When necessary to exhaust vacuum collection devices indoors, including hand-held and wet-vacuum machines, keep discharge air in work area, and provide machine air discharge HEPA filtration, rated at 99.97 percent collection efficiency for 0.3-micron particle and larger.