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February 4 – 5

Phius Certified Verifier Training | February 2026 | Boston, MA
Take advantage of the Massachusetts passive building boom!
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  February 4 – 5
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Project 2437

Nocturne Passive House Apartments

WC STUDIO architects

Tacoma, Washington

Building Function

Multifamily
Project Type

New Construction
ASHRAE Climate Zone

4C - Mixed - Marine
Status

Certified
INT. Conditioned Floor Area

9670 ft²

Core Project Team

Phius CPHB

John Wolters
Phius CPHC (Lead)

Cady Chintis
Phius Certified Verifier

Tom Balderston
Project Submitter

Cady Chintis

Project Information

- Architecture Planning
  
  WC STUDIO architects
- Building Owner
  
  6th and Grant Apartments LLC
- Mechanical Systems Designer
  
  HVAC Doublecheck
- Construction Company
  
  WC STUDIO builders
- Building Function
  
  Multifamily
- Project Type
  
  New Construction
- Number of Units
  
  15
- Number of Stories
  
  3
- Program Version
  
  Phius CORE 2021
- All Electric
  
  Yes
- INT. Conditioned Floor Area
  
  9670 ft²
- Status
  
  Certified
- Design Certification
  
  May 29, 2024
- Final Certification
  
  January 21, 2026
- ASHRAE Climate Zone
  
  4C - Mixed - Marine
- Region
  
  Northwest

Performance

- Annual Heating Demand
  
  3.16 kBTU/ft².yr
- Annual Cooling Demand
  
  1.41 kBTU/ft².yr
- Peak Heating Load
  
  2.46 kBTU/ft².yr
- Peak Cooling Load
  
  1.48 kBTU/ft².yr
- Site Energy Use Index (EUI)
  
  21.86 kBTU/ft².yr
- Compliance Software
  
  WUFI Passive
- Source Energy (Residential)
  
  7433 kWh/person.yr
- Air Tightness (per enclosure area)
  
  0.038 CFM50/ft²

Enclosure

- Window Manufacturer 1
  
  Amberline

Systems & Equipment

- Ventilation System Manufacturer
  
  Minotair
- Heating System Manufacturer
  
  Minotair
- Cooling System Manufacturer
  
  Minotair
- Hot Water System Manufacturer
  
  Rheem