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L <br /> NOTICE' TO BUILDERS <br /> This notice is NOT to be submitted for.permitting, it is informational <br /> only for Builders. <br /> SPRAY FOAM APPLICATION ONLY <br /> Outdoor air cfm is included in this calculation and is recommended for an <br /> outside air vent to be installed to pass the ACH50 blower door requirement. <br /> See below recommended installation method: <br /> Fresh Air <br /> Intake <br /> r with Grille <br /> Return Filter <br /> Air Grille ' <br /> Filter <br /> Per R403.6, Mechanical ventilation (Mandatory), "The building shall be <br /> provided with ventilation that meets the requirements of the Florida.Building Code, <br /> Residential, or Florida Building Code, Mechanical, as applicable, or with other <br /> approved means of ventilation including:Natural, Infiltration or Mechanical means. <br /> Outdoor air intakes and exhausts shall have automatic or gravity dampers that <br /> close when the ventilation system is not operating." <br />