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No. 1591 Project Larson Passive House Status Certified
Lead CPHC Michael Nolan
Builder Oak Tree Homes Location Indianola, IA
QA/QC Rater David Holtzclaw Architecture Planning Horizon Architecture Mechanical Systems Designer TBD
Constr. Type Timber Bldg. Function Single Family Floor Area 2112
Project Type New Construction HERS Index LEED Rating
Energy Star Rating Heating Degree Days 212 Cooling Degree Days 153
Units 1 Certification Type PHIUS+2015 Certification Date June 12, 2020
Exterior Wall LP Smartside | Tyvek (weather and bulk water barrier) | 1/2" plywood | 9.5" TJI with dense pack cellulose | OSB (Taped, air barrier) | 2x4 stud with ocSPF | 1/2" GWB. R-50, vapor open wall system.
Floor Slab on Grade - 4" concrete | 15 Mil Stego Barrier | 3" XPS Insulation | 4" Clean stone. (R-15) Frost Foundation wall - Superior Wall Xi with 1.5" XPS exterior insulation to 42" below grade (R-20)
Roof Asphalt Shingles. 24" Blown Cellulose over 1/2" OSB (air barrier) and 1/2" GWB (R-80)
Window Frame UPVC Schuco LIving MD82
Window Glazing Triple Glazed Schuco
Entrance Door Schuco Living MD82
Ventilation Zehnder ComfoAire 350
Heating System Ducted Mini-Split
Submitter Michael Nolan
Air-tightness 0.023 cfm/sf @ 50Pa or 0.48 ACH50
Cooling System Ducted Mini-Split
Additional Consultants
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