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No. 1241 Project Blue-Ridge Passive House Residence Status Pre-certified
Lead CPHC
Builder Dyna Contracting Location Seattle, WA
QA/QC Rater Architecture Planning Whitney Architecture Mechanical Systems Designer Nelson Heating, Zehnder USA
Constr. Type Timber Bldg. Function Single Family Floor Area 2891
Project Type New Construction HERS Index LEED Rating
Energy Star Rating Heating Degree Days 4341 Cooling Degree Days
Units 1 Certification Type PHIUS+2015 Certification Date
Exterior Wall Below grade (R-55.0): 5/8" drywall, 2x4 wood studs & high-density fiberglass BIB insulation, 6" polyisocyanurate insulation, concrete foundation wall. Above grade (R-45.2): 5/8" drywall 2x4 wood studs, 3" gap, 2x6 wood studs, high-density fiberglass BIB insulation, plywood sheathing, Prosoco R-Guard air & WRB, rain-screen cavity & cladding (Boral siding & fiber cement panels).
Floor Basement (R-32.1): engineered wood floor, 4" concrete slab, poly air & vapor barrier, 8" EPS insulation. Over cistern (R-68.9): engineered wood floor, plywood subfloor, 18" wood trusses & high-density fiberglass BIB insulation, Tyvek air barrier membrane, ventilation cavity (power-vented), plywood with liquid-applied cistern liner membrane.
Roof Main roof (R105.0): 5/8" drywall, 1 1/2" furring (installation cavity), 26" wood trusses with 20" high-density fiberglass BIB & 6" closed cell spray-foam insulation, plywood sheathing, standing-seam metal roofing.
Window Frame Unilux DesignLine 0.7 aluminum-clad wood, U-0.162 Btu/h.ft2.F
Window Glazing Unilux SuperThermo 3, U-0.088 Btu/h.ft2.F
Entrance Door Unilux all-wood
Ventilation Zehnder Novus 300 HRV
Heating System Hydronic coil in HRV air stream, hydronic in-floor heating
Submitter Markus Barrera-Kolb
Air-tightness 0.42 ACH50
Cooling System n/a
Additional Consultants Bykonen Carter Quinn (structural engineering); Geotech Consultants, Inc. (geotechnical engineering); RainBank (water reclamation & treatment); Rainshadow Solar, Inc. (PV system)
Additional Notes 20kW roof-mounted photovoltaic array with battery storage; roof-fed rainwater collection system with 45,000gal cistern and treatment for potable use within the dwelling

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