Harrisburg Housing Authority, Harrisburg, PA: The Sylvester Jackson Tower is a thirteen (13) story, approximately 140,000 square foot housing facility built in the early 1970s. The new design converts family style dwelling units to efficiencies and one bedroom apartments, including ADA units for a total of 159 units. This facility is located next to the Lick Tower at 1301-1315 North Sixth Street. Mark Ulrick Engineers, Inc. provided mechanical, plumbing and fire protection engineering design and construction administration. The systems design concept was a two-pipe fan coil for the apartments and a four-pipe fan coil for the common spaces. The design incorporated the use of energy recovery units for make-up/exhaust air, high efficiency condenser boilers, air cooled scroll chillers and variable speed pumping. All plumbing fixtures were of the low water consumption type. Polyethylene piping systems were used for the fan coil unit and domestic water piping.