PHnw Building Directory

Hawthorne Haus- Unit A

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 ft2TFA1,893 m2TFA


Heating Degree Days:8,440 °F•day/yr4,688.9 °C•day/yr
Annual heat demand:3.59 kBtu/yr•ft2TFA11.3 kWh/yr•m2TFA
Heat load:2.67 Btu/hr•ft2TFA8.4 W/m2TFA
Annual cooling demand:1.05 kBtu/yr•ft2TFA3.3 kWh/yr•m2TFA
Cooling load:4.88 Btu/hr•ft2TFA15.4 W/m2TFA
Primary energy demand:35.50 kBtu/yr•ft2TFA112 kWh/yr•m2TFA
Airtightness:0.37 ACH50


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


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


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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