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December 1 – January 16

Phius Certified Trades Professional - Enclosure Specialist Training | December 2025 & January 2026 | Portland, OR
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Project 2114

Fountaingrove Passive House

Signum Architecture

Santa Rosa, California

Building Function

Single-Family
Project Type

New Construction
ASHRAE Climate Zone

4C - Mixed - Marine
Status

Certified
INT. Conditioned Floor Area

2718 ft²

Core Project Team

Phius Certified Rater

John Tao
Phius CPHC (Secondary)

Jarrod Denton
Phius CPHC (Lead)

Dylan Lamar
Project Submitter

Dylan Lamar

Project Information

- Architecture Planning
  
  Signum Architecture
- Additional Consultants
  
  Ashley & Vance Engineering, Inc.
- Construction Company
  
  Wright Residential
- Building Function
  
  Single-Family
- Project Type
  
  New Construction
- Number of Units
  
  1
- Number of Stories
  
  2
- Program Version
  
  Phius CORE 2021
- All Electric
  
  Yes
- INT. Conditioned Floor Area
  
  2718 ft²
- Status
  
  Certified
- Design Certification
  
  March 17, 2023
- Final Certification
  
  August 14, 2024
- ASHRAE Climate Zone
  
  4C - Mixed - Marine
- Region
  
  Southwest

Performance

- Annual Heating Demand
  
  4.03 kBTU/ft².yr
- Annual Cooling Demand
  
  2.74 kBTU/ft².yr
- Peak Heating Load
  
  3.38 kBTU/ft².yr
- Peak Cooling Load
  
  2.26 kBTU/ft².yr
- Site Energy Use Index (EUI)
  
  19.5 kBTU/ft².yr
- Site Energy Use Index (w/Renewables)
  
  12.31 kBTU/ft².yr
- Compliance Software
  
  WUFI Passive
- Source Energy (Residential)
  
  5506 kWh/person.yr
- Source Energy (Residential w/Renewables)
  
  3443 kWh/person.yr
- Air Tightness (per enclosure area)
  
  0.046 CFM50/ft²

Enclosure

- Wall 1 R-Value
  
  40
- Roof 1 R-Value
  
  85
- Floor 1 R-Value
  
  19
- Window Manufacturer 1
  
  Sokolka
- Whole Window U-Value 1
  
  0.15
- Window Glazing SHGC 1
  
  0.3

Systems & Equipment

- Ventilation System Manufacturer
  
  Zehnder
- Ventilation System Layout
  
  Centralized
- Ventilation System Type
  
  ERV
- Sensible Recovery Efficiency
  
  80%
- Measured Ventilation Fan Efficiency
  
  0.46 W/cfm
- Heating System Manufacturer
  
  Mitsubishi
- Heating System Type
  
  Air Source Heat Pump
- Cooling System Manufacturer
  
  Mitsubishi
- Hot Water System Manufacturer
  
  Sanden or SanCO2
- Hot Water System Layout
  
  Centralized
- Hot Water System Type
  
  Split Heat Pump Water Heater
- Renewable Energy Type(s)
  
  On-Site PV
- Renewable Energy Annual Production
  
  18603 kWh/yr
- Renewable Energy System Size
  
  12.96kW