Fresh air ventilation system operates fresh-air intake damper and, when necessary, activates main HVAC blower to efficiently meet American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) ventilation rates. Designed to help meet local ventilation codes and standards, including ASHRAE 62.2-2010 standard (Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings). Microcontroller optimizes air delivery schedule to make efficient use of normal HVAC run times. Easy-to-use input dials allow customized ventilation for each installation. Test mode includes immediate feedback to installer to confirm that air delivery requirements of selected ventilation standard are being met. Economical supply-only ventilation; works with forced air system. Can be used with other equipment, such as Energy Recovery Ventilation (ERV) or Heat Recovery Ventilation (HRV).