ABOUT | This 3-story, 2,300 sf brick rowhouse in Philadelphia is undergoing one of the city's first foam-free deep energy retrofits. Foregoing the toxicity and underperformance of spray foam, and instead using Building Biologyand Passive House principles as guides this gut-job renovation will have a 21st century building enclosure as a model house for the Anthropocene.Hygrothermal modeling using WUFI. will help ensure bi-directional vapor diffusion of accumulated moisture, helping the vapor-variable air barrier and dense packed cellulose greatly reduce this homes annual energy bill while reducing its contribution to climate change. This electric-only, "frack-free" house is solar-ready to push it closer to net-zero energy, and as a bonus will not support the hydraulic fracturing industry in its operation.
THE NUMBERS | Year Built: 2012 | Area 2,676 SF | HERS Rating: 34 | Projected Energy Costs: $115 monthly (avg.) | R Values: R23 Exterior Walls, R47 Roof | Blower Door Test Result= 0.39 ACH50 | Predicted annual energy use (HERS model): 9,554 kWh | Predicted annual energy use (PHPP): 8,320 kWh | Actual annual energy use: TBD