H&W Mechanical performed a complete conversion of an existing four story elementary school into a 76-unit apartment complex in Philadelphia.  The mechanical system consisted of several large tonnage VRF systems feeding all the apartment units.  Two (2) new Energy Recovery Units were utilized to provide make-up air to the apartments and the common space areas.  All newly installed bathroom exhaust was ducted back to the new recovery units in order to provide building efficiency and reduce operational costs.  H&W Mechanical installed all new ductwork, insulation, balancing and automated controls for a fully operational system.