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 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
May 21

Passive Building Foundations Training Webinar
Learn more about the new Passive Building Foundations Training
Upcoming Sessions
- Builders 101
  May 1
- WUFI Passive - Single Family | May 2024
  May 2 – 8
- Phius Certified Builder Exam | April 2024
  May 3 – June 2
- Humid Climate Conference Day 1
  May 6
- Policy Work
  Promoting policies designed to grow passive building
  Policy Database
  
  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
  
  WUFI Passive Design Tool
  
  Climate Data
  
  Quality Assurance
  
  Tech Corner

Project 1925

Blake Street Apartments

Lewiston, Maine

Building Function

Multifamily
Project Type

New Construction
ASHRAE Climate Zone

6A - Cool - Humid
Construction Completion

2021
Status

Final Certified
INT. Conditioned Floor Area

9273 sq. ft.

Core Project Team

Phius Certified Verifier

Michael Browne
Phius CPHC (Secondary)

Leen Hariri
Phius CPHC (Lead)

Christopher Briley
Project Submitter

Christopher Briley

Project Information

- Architecture Planning
  
  bild Architecture
- Building Owner
  
  Blake and Walnut LP
- Mechanical Systems Designer
  
  Ripcord Engineering Inc
- Construction Company
  
  Hebert Construction LLC
- Building Function
  
  Multifamily
- Project Type
  
  New Construction
- Construction Type
  
  Wood Frame
- Number of Units
  
  9
- Number of Stories
  
  3
- Program Version
  
  PHIUS+ 2018
- INT. Conditioned Floor Area
  
  9273 sq. ft.
- Status
  
  Final Certified
- Design Certification
  
  June 23, 2023
- Final Certification
  
  April 4, 2024
- Construction Completion
  
  2021
- ASHRAE Climate Zone
  
  6A - Cool - Humid
- Region
  
  Northeast

Performance

- Annual Heating Demand
  
  6.07
- Annual Cooling Demand
  
  2.41
- Peak Heating Load
  
  4.64
- Peak Cooling Load
  
  1.99
- Site Energy Use Index (EUI)
  
  23.89
- Site Energy Use Index (w/Renewables)
  
  18.67
- Compliance Software
  
  WUFI Passive
- Source Energy (Residential)
  
  5178
- Source Energy (Residential w/Renewables)
  
  3808
- Air Tightness (per enclosure area)
  
  0.035

Enclosure

- Window Manufacturer 1
  
  LOGIC
- Window Manufacturer 2
  
  YKK AP 45XT
- Window Manufacturer 3
  
  YKK AP 50XT

Systems & Equipment

- Ventilation System Manufacturer
  
  Renewaire
- Measured Ventilation Fan Efficiency
  
  0.69
- Heating System Manufacturer
  
  Ephoca
- Cooling System Manufacturer
  
  Ephoca
- Hot Water System Manufacturer
  
  Intertek
- Renewable Energy Type(s)
  
  On-Site PV
- Renewable Energy Annual Production
  
  14191
- Renewable Energy System Size
  
  19.7