Specifications include, but are not limited to: A. Frequency of Change: (Quarterly) unless otherwise noted by the District. 1. Visually inspect air handlers and report needed repairs to The Little Rock School District. (example: frozen coils, broken or loose belts, locked up motors.) 2. Replace all air filters per manufacturer’s recommendations. 3. Verify each air handler has proper number of filters. 4. Filters must be pleated MERV-8 unless specified by district 5. Clean washable type filters and window unit filters.