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No. 1290 Project Wallingford Passive House Residence Status Certified
Lead CPHC Markus Barrera-Kolb
Builder Hammer & Hand Location Seattle, WA
QA/QC Rater Skylar Swinford Architecture Planning Whitney Architecture Mechanical Systems Designer
Constr. Type Timber Bldg. Function Single Family Floor Area 3458
Project Type New Construction HERS Index LEED Rating
Energy Star Rating Heating Degree Days 4341 Cooling Degree Days
Units 1 Certification Type PHIUS+ Certification Date August 21, 2017
Exterior Wall Below grade (R-39.6): 5/8" drywall, 2x4 wood studs with high-density blown-in fiberglass insulation, 6" EPS insulation, concrete foundation wall (air barrier). Above grade (R38.1): 5/8 drywall, 2x8 wood studs with high-density blown-in fiberglass insulation, ZIP-sheathing OSB w/ sealed seams (air & water barrier), 3" Roxul rock wool panels, vertical furring & fiber cement panel cladding
Floor Basement (R-34.6): concrete slab, air & vapor barrier membrane, 8" EPS insulation. Over garage (R52.0): finish flooring, plywood subfloor (air barrier), 14" TJI joists with high-density blown-in fiberglass insulation, 5/8" drywall
Roof Lower roofs (R-76.2): 5/8" drywall, 14" TJI rafters with high-density blown-in fiberglass insulation, plywood sheathing (air barrier), 2x8 overframing at overhangs with 7 1/4" EPS insulation (rock wool between overframing members), 2x furring for venting cavity, plywood, roofing membrane. Upper roof (R-49.0): 5/8" drywall, furring for installation cavity, air barrier membrane, 16" wood trusses with 14.5" high-density blown-in fiberglass insulation, vapor permeable insulation baffles & vent cavity in truss bays, plywood sheathing, metal roofing system.
Window Frame Unilux DesignLine 0.7 (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 ComfoAir 550
Heating System Mitsubishi ducted mini-split with two indoor units
Submitter Markus Barrera-Kolb
Air-tightness 0.32 ACH50
Cooling System Mitsubishi ducted mini-split with two indoor units
Additional Consultants Bykonen Carter Quinn (structural engineering)
Additional Notes Residential elevator (3 stops) within the thermal envelope.

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