Skip to main content

- What is Passive Building?
  Your passive building questions, answered
  
  Passive Building
  
  Passive Building Principles
  
  Passive Building FAQs
  
  A Better Way to Zero
  
  Passive Building Foundations Training
- Sectors
  Passive isn't just for houses
  
  Single-Family
  
  Multifamily
  
  Office Buildings
  
  Schools
  
  Other Non-Residential
- Projects
  Phius Certified Projects are the most energy efficient and comfortable buildings in the world
  Find a Project
  
  Project Certification
  
  Submit a Project
  
  Certification Review Queue
- Products
  Phius Certified Products are guaranteed to perform to passive standards
  View Products
  
  Product Certification Overview
  
  Window Certification
  
  Panel Certification
- Professionals
  Phius Certified Professionals are on the cutting edge of high-performance building
  Find a Professional
  
  Phius Certified Consultant (CPHC®)
  
  Phius Certified Builder (CPHB)
  
  Phius Certified Rater
  
  Phius Certified Verifier
  
  Phius Certified Trades Professional
  
  Phius Associate
  
  Maintain Credentials
Our Approach
- New Construction
  Phius CORE and Phius ZERO provide the path for constructing a Phius building from the ground up.
- Retrofit
  Upgrade existing buildings to Phius standards using Phius CORE REVIVE and Phius ZERO REVIVE.
- Commercial
  Phius standards aren't just for residential buildings. Phius CORE COMM and Phius ZERO COMM can be applied to any non-residential building.
Categories
December 1 – January 16

Phius Certified Trades Professional - Enclosure Specialist Training | December 2025 & January 2026 | Portland, OR
Become a Phius Enclosure Specialist!
Upcoming Sessions
- Member Office Hours - Projects
  December 9
- Jan. Webinar: Walking Through METr
  January 13
- Member Office Hours - METr
  January 20
- Phius Certified Builder Training and Certification Exam | January 2026
  January 20 – 30
- Policy Work
  Promoting policies designed to grow passive building
  Policy Database
  
  Financial Incentives
  
  Codes
  
  Qualified Allocation Plans
  
  Cost Data
- Tools and Support
  Providing the tools you need to create healthier buildings
  Resource Library
  
  Certification Support
  
  Calculators and Protocols
  
  Feasibility Study
  
  METr Design Tool
  
  WUFI Passive Design Tool
  
  Climate Data
  
  Quality Assurance
  
  Tech Corner

Passive Building
- What is Passive Building?
  Your passive building questions, answered
- Sectors
  Passive isn't just for houses
Certifications
- Projects
  Phius Certified Projects are the most energy efficient and comfortable buildings in the world
  Find a Project
- Products
  Phius Certified Products are guaranteed to perform to passive standards
  View Products
- Professionals
  Phius Certified Professionals are on the cutting edge of high-performance building
  Find a Professional
Standards
Our Approach
- New Construction
  Phius CORE and Phius ZERO provide the path for constructing a Phius building from the ground up.
- Retrofit
  Upgrade existing buildings to Phius standards using Phius CORE REVIVE and Phius ZERO REVIVE.
- Commercial
  Phius standards aren't just for residential buildings. Phius CORE COMM and Phius ZERO COMM can be applied to any non-residential building.
Education
Categories
Upcoming Sessions
- Member Office Hours - Projects
  December 9
- Jan. Webinar: Walking Through METr
  January 13
- Member Office Hours - METr
  January 20
- Phius Certified Builder Training and Certification Exam | January 2026
  January 20 – 30
December 1 – January 16

Phius Certified Trades Professional - Enclosure Specialist Training | December 2025 & January 2026 | Portland, OR
Become a Phius Enclosure Specialist!
Resources
- Policy Work
  Promoting policies designed to grow passive building
  Policy Database
- Tools and Support
  Providing the tools you need to create healthier buildings
  Resource Library
About Us
Our People
Phius Alliance

Quick Links

Project 1601

Bowdoin College SCSC - LLC

Orr's Island, Maine

Building Function

School / Education
Project Type

New Construction
ASHRAE Climate Zone

6A - Cool - Humid
Status

Certified
INT. Conditioned Floor Area

5373 ft²

Core Project Team

Phius Certified Verifier

Gert Guldentops
Phius CPHC (Lead)

Nicole Peterson
Project Submitter

elsa mullin

Project Information

- Building Owner
  
  Bowdoin College
- Construction Company
  
  JF Scott Construction (Adam Lyons)
- Building Function
  
  School / Education
- Project Type
  
  New Construction
- Construction Type
  
  Wood Frame
- Number of Units
  
  1
- Number of Stories
  
  1
- Program Version
  
  PHIUS+ 2018
- INT. Conditioned Floor Area
  
  5373 ft²
- Status
  
  Certified
- Design Certification
  
  November 6, 2020
- Final Certification
  
  August 4, 2021
- ASHRAE Climate Zone
  
  6A - Cool - Humid
- Region
  
  Northeast

Performance

- Annual Heating Demand
  
  10.5 kBTU/ft².yr
- Annual Cooling Demand
  
  2.33 kBTU/ft².yr
- Peak Heating Load
  
  7.66 kBTU/ft².yr
- Peak Cooling Load
  
  1.89 kBTU/ft².yr
- Site Energy Use Index (EUI)
  
  23.57 kBTU/ft².yr
- Site Energy Use Index (w/Renewables)
  
  14.62 kBTU/ft².yr
- Compliance Software
  
  WUFI Passive
- Source Energy (Non-Residential)
  
  59.07 kBTU/ft².yr
- Source Energy (Non-Residential w/Renewables)
  
  34 kBTU/ft².yr
- Air Tightness (per enclosure area)
  
  0.073 CFM50/ft²

Enclosure

- Wall 1 Type
  
  Framing with Continuous Insulation
- Wall 1 R-Value
  
  32
- Wall 1 Insulation Type
  
  Cellulose, XPS
- Wall 2 Type
  
  Framing with Continuous Insulation
- Wall 2 R-Value
  
  29
- Wall 2 Insulation Type
  
  Cellulose, Mineral Wool (Cavity)
- Roof 1 Type
  
  Unvented Roof
- Roof 1 R-Value
  
  41
- Roof 1 Insulation Type
  
  PolyIso
- Roof 2 Type
  
  Vented Above Deck
- Roof 2 R-Value
  
  57
- Roof 2 Insulation Type
  
  Cellulose
- Floor Type 1
  
  Slab on Grade
- Floor 1 R-Value
  
  20
- Floor 1 Insulation Type
  
  XPS
- Window Product Name 1
  
  Fixed
- Whole Window U-Value 1
  
  0.16
- Window Glazing SHGC 1
  
  0.38
- Window Product Name 2
  
  Operable
- Whole Window U-Value 2
  
  0.17
- Window Glazing SHGC 2
  
  0.54
- Whole Door U-Value
  
  0.46

Systems & Equipment

- Ventilation System Layout
  
  Centralized
- Ventilation System Type
  
  ERV
- Sensible Recovery Efficiency
  
  84%
- Measured Ventilation Fan Efficiency
  
  1.5 W/cfm
- Heating System Type
  
  Variable Refrigerant Flow (VRF)
- Hot Water System Layout
  
  Centralized
- Hot Water System Type
  
  Natural Gas Water Heater
- Renewable Energy Type(s)
  
  RECs (Renewable Energy Certificates)