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Project 2034

Red Willow

Seattle, Washington

Building Function

Multifamily
Project Type

New Construction
ASHRAE Climate Zone

4C - Mixed - Marine
Construction Completion

2023
Status

Design Certified
INT. Conditioned Floor Area

9717 sq. ft.

Core Project Team

Phius Certified Verifier

Tadashi Shiga
Phius CPHC (Lead)

Dan Whitmore
Project Submitter

Dan Whitmore

Project Information

- Developer
  
  Red Door Sustainable Housing
- Architecture Planning
  
  VY Architecture
- Mechanical Systems Designer
  
  Staengl Engineering
- Additional Consultants
  
  Gary Klein Associates
- Building Function
  
  Multifamily
- Project Type
  
  New Construction
- Construction Type
  
  Wood-Frame
- Number of Units
  
  12
- Number of Stories
  
  3
- Program Version
  
  Phius CORE 2021
- All Electric
  
  Yes
- INT. Conditioned Floor Area
  
  9717 sq. ft.
- Market Category
  
  Affordable Housing
- Status
  
  Design Certified
- Design Certification
  
  January 28, 2022
- Construction Completion
  
  2023
- ASHRAE Climate Zone
  
  4C - Mixed - Marine
- Region
  
  Northwest

Performance

- Annual Heating Demand
  
  3.68
- Annual Cooling Demand
  
  0.52
- Peak Heating Load
  
  3.5
- Peak Cooling Load
  
  1.14
- Site Energy Use Index (EUI)
  
  17.52
- Compliance Software
  
  WUFI Passive
- Source Energy (Residential)
  
  2721

Enclosure

- Wall 1 Type
  
  All Insulation within Framing
- Wall 1 Insulation Type
  
  Fiberglass
- Roof 1 Type
  
  Vented Below Deck
- Floor Type 1
  
  Slab on Grade
- Floor 1 Insulation Type
  
  EPS
- Floor Type 2
  
  Overhang Floor
- Floor 2 Insulation Type
  
  EPS, Fiberglass

Systems & Equipment

- Ventilation System Layout
  
  Semi-Centralized
- Ventilation System Type
  
  HRV
- Heating System Manufacturer
  
  Ephoca
- Hot Water System Type
  
  Heat Pump Water Heater
- Range Hood Type
  
  Exhaust
- Dryer Type
  
  Non-Vented