Building Use: Townhouses
Project Type: New low-energy building with passive house components
Two-unit townhouse project built for three generations. Designed and built to PH standards. Each unit was modeled separately.
Location: | Portland, Oregon 97202 | |
Dwelling Units: | 2 | |
PH Calculation Protocol(s): | PHI | |
PH Modeling Software(s): | PHPP | |
Year Of Construction: | 2015 | |
Project Size | ||
Floor Area: | 20,376.1 ft2TFA | 1,893 m2TFA |
Performance | ||
Heating Degree Days: | 8,440 °F•day/yr | 4,688.9 °C•day/yr |
Annual heat demand: | 3.59 kBtu/yr•ft2TFA | 11.3 kWh/yr•m2TFA |
Heat load: | 2.67 Btu/hr•ft2TFA | 8.4 W/m2TFA |
Annual cooling demand: | 1.05 kBtu/yr•ft2TFA | 3.3 kWh/yr•m2TFA |
Cooling load: | 4.88 Btu/hr•ft2TFA | 15.4 W/m2TFA |
Primary energy demand: | 35.50 kBtu/yr•ft2TFA | 112 kWh/yr•m2TFA |
Airtightness: | 0.37 ACH50 | |
Envelope | ||
Construction Type: | wood | |
Floor Assembly: | Concrete basement slab over 9" EPS and air barrier | |
Wall Assembly: | Below grade- Drywall, 2x4 framing w/ 5.5" cellulose, 4" EPS, concrete wall Above grade- Drywall, 2x6 framing w/ cellulose, plywood sheathing, 4" polyiso, self-adhered WRB, 1x4 furring, siding | |
Roof Assembly: | Drywall, 14" TJI joists w/ cellulose, plywood decking, 7" polyiso, Ice&Water shield, standing seam metal roof | |
Windows: | Geisler Evokativ 82mm uPVC | |
Entry Doors: | Geisler Evokativ wood entry and 82mm uPVC patio doors | |
Systems | ||
Ventilation system: | Zehnder CA350 HRV | |
Heating/Cooling system: | Mitsubishi KD09 ducted minisplit | |
Domestic hot water system: | Sanden CO2 Heat Pump Water Heater | |
Renewables: | n/a- due to street tree shading | |
Team | ||
Passive House Consultant: | Robert Hawthorne | |
Passive House Consultant Certification: | PHIUS | |
Architect: | Robert Hawthorne | |
Structural Engineer: | DCI Engineers | |
Contractor: | PDX Living, LLC | |
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