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Project 2421

17th Street Passive House

Boise, Idaho

Building Function

Single-Family
Project Type

Retrofit
ASHRAE Climate Zone

5B - Cool - Dry
Status

Final Certified
INT. Conditioned Floor Area

3434 sq. ft.

Core Project Team

Phius Certified Rater

John Reuter
Phius CPHC (Lead)

Scott Yribar
Project Submitter

Scott Yribar

Project Information

- Architecture Planning
  
  VY Architecture
- Building Owner
  
  Heidi & Cody Boyce
- Mechanical Systems Designer
  
  Energy Systems Consultants
- Construction Company
  
  KAI LLC
- Building Function
  
  Single-Family
- Project Type
  
  Retrofit
- Number of Units
  
  1
- Number of Stories
  
  3
- Program Version
  
  Phius CORE REVIVE 2021
- All Electric
  
  Yes
- INT. Conditioned Floor Area
  
  3434 sq. ft.
- Status
  
  Final Certified
- Design Certification
  
  September 27, 2023
- Final Certification
  
  January 26, 2024
- ASHRAE Climate Zone
  
  5B - Cool - Dry
- Region
  
  Northwest

Performance

- Annual Heating Demand
  
  6.63
- Annual Cooling Demand
  
  2.76
- Peak Heating Load
  
  3.96
- Peak Cooling Load
  
  2.24
- Site Energy Use Index (EUI)
  
  10.41
- Site Energy Use Index (w/Renewables)
  
  7.11
- Compliance Software
  
  WUFI Passive
- Source Energy (Residential)
  
  4715
- Source Energy (Residential w/Renewables)
  
  3163
- HERS Rating w/Renewables
  
  20
- Air Tightness (per enclosure area)
  
  0.017

Enclosure

- Window to Wall Ratio
  
  0.16
- Wall 1 Type
  
  Insulated Concrete Form (ICF)
- Wall 1 R-Value
  
  35
- Wall 1 Insulation Type
  
  Cellulose, EPS
- Wall 2 Type
  
  Framing with Continuous Insulation
- Wall 2 R-Value
  
  34
- Wall 2 Insulation Type
  
  Cellulose, EPS, OCSPF
- Wall 3 Type
  
  Framing with Continuous Insulation
- Wall 3 R-Value
  
  30
- Wall 3 Insulation Type
  
  Cellulose, EPS, OCSPF
- Roof 1 Type
  
  Vented Above Deck
- Roof 1 R-Value
  
  58
- Roof 1 Insulation Type
  
  Other
- Roof 2 Type
  
  Vented Above Deck
- Roof 2 R-Value
  
  62
- Roof 2 Insulation Type
  
  Other
- Floor Type 1
  
  Basement Slab
- Floor 1 R-Value
  
  24
- Floor 1 Insulation Type
  
  EPS
- Window Manufacturer 1
  
  Zola
- Window Product Name 1
  
  Zola ThermoPlus - Operable (0.51 SHGC)
- Whole Window U-Value 1
  
  0.15
- Window Glazing SHGC 1
  
  0.51
- Window Product Name 2
  
  Zola ThermoPlus - Fixed (0.51 SHGC)
- Whole Window U-Value 2
  
  0.15
- Window Glazing SHGC 2
  
  0.51
- Door Manufacturer
  
  Zola
- Door Product Name
  
  Zola ThermoPlus - Terrace Door (0.51 SHGC)
- Whole Door U-Value
  
  0.16

Systems & Equipment

- Ventilation System Manufacturer
  
  Zehnder
- Ventilation System Product Name
  
  Zehnder
- Ventilation System Layout
  
  Centralized
- Ventilation System Type
  
  ERV
- Sensible Recovery Efficiency
  
  83
- Latent Recovery Efficiency
  
  71
- Heating System Manufacturer
  
  Mitsubishi
- Heating System Product Name
  
  Mitsubishi
- Heating System Type
  
  Air Source Heat Pump
- Heating System Rating
  
  COP
- Heating System Performance (COP)
  
  2.25
- Heating System Performance (% Efficiency)
  
  0.45
- Cooling System Manufacturer
  
  Mitsubishi
- Cooling System Product Name
  
  Mitsubishi
- Cooling System Type
  
  Air Source Heat Pump
- Cooling System Rating
  
  EER
- Cooling System Performance (EER)
  
  12.67
- Hot Water System Product Name
  
  Rheem
- Hot Water System Layout
  
  Centralized
- Hot Water System Type
  
  Heat Pump Water Heater
- Hot Water System Rating
  
  Energy Factor (EF)
- Hot Water System Performance Rating
  
  4.32
- Range Hood Type
  
  Exhaust
- Dryer Type
  
  Vented
- Renewable Energy Type(s)
  
  On-Site PV
- Renewable Energy Annual Production
  
  7559
- Renewable Energy System Size
  
  6.07