The SEMCO SynergyPLUS® (SP) Energy Recovery Module has been specifically designed to bolt onto the Trane® Precedent™ series. The SP reduces the energy required to cool or heat the outdoor air by as much as 80%. This unique capability allows both new and existing buildings to benefit from healthy indoor environments. The SP modules also allows the Precedent system to effectively and economically accommodate the three-to-four-fold increase in outdoor air quantities that is recommended by the ASHRAE Standard 62.