The SEMCO FV (Fresh Air Ventilator) Series of outdoor air pre-conditioners have been specifically designed to reduce the energy required to heat or cool outdoor air by up to 80 percent. The FV pre-conditioner allows the HVAC system to effectively and economically accommodate the three-to-four-fold increase in outdoor air quantities, which is recommended by the ASHRAE Standard 62, Ventilation for Acceptable Indoor Air Quality. This unique capability allows both new and existing buildings to benefit from a healthy indoor environment.