Total Exhaust HoodPg.4Figure 2.2Lift rear plenum and align with pre-drilled holes, see Figure 2.2. Insert all of the screwsbefore tightening them. Connect plastic tubing to fitting on transition. Supply fans will notrun unless tubing is connected.3. Pre-filterYour Total Exhaust Hood is equipped with disposable pre-filters, which are manufacturedfrom a bonded synthetic media set into a moisture resistant beverage board. Pleated pre-filters carry an efficiency rating of MERV 7 (Minimum Efficiency Reporting Value). The filtersalso provide an Average Atmospheric Dust Spot Efficiency of 25-30% to ASHRAE TestStandard 52.14. Pre-filter MaintenancePlease check your pre-filters on a monthly basis and change as necessary. To change yourpre-filter simply remove old pre-filters and replace with new pre-filters. No tools are required