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Project 1736

Cougar Mountain Passive House

Issaquah, Washington

Building Function

Single-Family
Project Type

New Construction
ASHRAE Climate Zone

4C - Mixed - Marine
Status

Final Certified
INT. Conditioned Floor Area

3704 sq. ft.

Core Project Team

Phius CPHB

Jon Alexander
Phius Certified Rater

Tom Balderston
Project Submitter

John Novak

Project Information

- Building Owner
  
  Lizella West & Richard Hoadley
- Building Function
  
  Single-Family
- Project Type
  
  New Construction
- Number of Units
  
  1
- Number of Stories
  
  2
- Program Version
  
  PHIUS+ 2018
- All Electric
  
  Yes
- INT. Conditioned Floor Area
  
  3704 sq. ft.
- Status
  
  Final Certified
- Design Certification
  
  October 21, 2022
- Final Certification
  
  March 12, 2024
- ASHRAE Climate Zone
  
  4C - Mixed - Marine
- Region
  
  Northwest

Performance

- Annual Heating Demand
  
  5.15
- Annual Cooling Demand
  
  1.14
- Peak Heating Load
  
  3.58
- Peak Cooling Load
  
  1.32
- Site Energy Use Index (EUI)
  
  17.93
- Site Energy Use Index (w/Renewables)
  
  2.08
- Compliance Software
  
  WUFI Passive
- Source Energy (Residential)
  
  9083
- Source Energy (Residential w/Renewables)
  
  1055
- HERS Rating w/Renewables
  
  -28
- Air Tightness (per enclosure area)
  
  0.03

Enclosure

- Wall 1 R-Value
  
  45
- Roof 1 R-Value
  
  57
- Floor 1 R-Value
  
  32
- Window Manufacturer 1
  
  Unilux
- Whole Window U-Value 1
  
  0.17
- Window Glazing SHGC 1
  
  0.52

Systems & Equipment

- Ventilation System Manufacturer
  
  Zehnder
- Measured Ventilation Fan Efficiency
  
  0.44
- Heating System Manufacturer
  
  Sanden
- Cooling System Manufacturer
  
  Mitsubishi
- Hot Water System Manufacturer
  
  Sanden
- Renewable Energy Type(s)
  
  On-Site PV
- Renewable Energy Annual Production
  
  17203
- Renewable Energy System Size
  
  17.6