CITYLIGHT
Religious Assembly, Early Childhood Education
Adaptive Reuse, Historic Deep Energy Retrofit
30,000 SF
Philadelphia, PA: Manayunk
Built circa 1850 on the banks of the Schuylkill River, the Roxborough Mills building is being transformed into a home for Citylight Church. This project examines the challenges of renovating a 175-year-old building, navigating Federal and Local Historical registers, and marrying these complexities with carbon goals. The building program leaves the ground level unoccupied while the second floor will include a 500-seat assembly worship space, prefunction areas, office space and both adult and early childhood education facilities. The project incorporates building science, life cycle carbon and operational costs into a broad conversation about historic preservation. It is modeled to use one half the embodied carbon of comparable new construction and with a future 66 kW rooftop solar PV array it is modeled to use one fifth the operational carbon compared with the regional average for this typology.
PROJECT STATS
Historic Deep Energy Retrofit
Philadelphia and Federal Register of Historic Places
Native landscape restoration
Building Geometry
Heat Loss Form Factor: 2.4
Window to Wall Ratio: 17.4
Building Metrics
Predicted Energy Use Intensity (pEUI): 35 kBtu/sf/yr (as designed)
Predicted Energy Use Intensity (pEUI): 15 kBtu/sf/yr (with addition of future rooftop solar PV array)
Predicted Embodied Carbon (modeled): 393 CO2e (A1-A3 Cradle to Gate)
Building Envelope
Slab on Grade: Existing to Remain
Floor/Ceiling: R-42 Min.
Above Grade Walls: R-23 Min.
Roof: R-30 C.I.
Windows: U-Value 0.20, SHGC 0.32
Skylights: U-Value 0.17, SHGC 0.26
Building Systems
Power / Fuel Source(s): All electric
Renewable Energy: Solar-ready for addition of future 66 kW rooftop solar PV array
Heating & Cooling: Air-cooled, heat recovery, variable refrigerant flow (VRF) heat pump
Ventilation: Centralized Energy Recovery Ventilator system
Hot Water: Heat pump water heater
Low-embodied carbon building envelope
LED lighting