The SEMCO FV-TS Series of outdoor air pre-conditioners has been specifically designed to reduce the energy required to heat or cool outdoor air by up to 80 percent. The FV-TS pre-conditioner allows the HVAC system to effectively and economically accommodate the three-to-four-fold increase in outdoor air quantities that is recommended by 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.