Portland's first speculative net-zero townhouse

– Specs:

• Each unit 3 bedroom, 2 bath, approximately 1,650 square feet
• One car garage
• Site net-zero energy: included photovoltaic system provides 100% of anticipated energy use
• Quality, modern materials including quartz countertops, reclaimed hardwood and exposed concrete floors, tile backsplash and shower, and translucent glass cabinets
• Designed and built to Passive House standards (certified)
• European tilt-and-turn triple glazed windows
• Ultra-high efficiency custom exterior doors with Vacuum Insulated Panels
• Heat pump heating/cooling and water heating 
• Super airtight construction for energy savings, comfort, and durability
• Heat Recovery Ventilation for superior air quality
• Remote-operated exterior power shades in living room
• Oversized soaking tub on second floor
• Private second floor deck
• Landscaped front yard with permeable paver driver
• Private back yard

– Completed: July 2013
– Client: Speculative (sold June/July 2013)
– Architect, Developer, Builder: PDX Living, LLC

Performance

   - 4.5 kW PV system (per unit)
   - Passive House Performance:
       - Specific heating demand: 4.7 kBTU/(ft^2yr)
       - Airtightness as tested: 0.34 ACH50
       - Total PE Value: 30.9 kBTU/(ft^2yr)