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December 1 – January 16

Phius Certified Trades Professional - Enclosure Specialist Training | December 2025 & January 2026 | Portland, OR
Become a Phius Enclosure Specialist!
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  January 13
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  January 20 – 30
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  January 20
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Project 1351

Passive Studio

River Architects

Cold Spring, New York

Building Function

Office
Project Type

Retrofit
ASHRAE Climate Zone

5A - Cool - Humid
Construction Completion

2018
Status

Certified
INT. Conditioned Floor Area

1097 ft²

Core Project Team

Phius Certified Verifier

Troy Hodas
Phius Certified Rater

Troy Hodas
Phius CPHC (Secondary)

John Loercher
Phius CPHC (Lead)

James Hartford
Project Submitter

Heidi Stephens

Project Information

- Architecture Planning
  
  River Architects
- Building Owner
  
  Form Factory LLC
- Construction Company
  
  Michael Robinson, Form Factory LLC
- Building Function
  
  Office
- Project Type
  
  Retrofit
- Construction Type
  
  Wood Frame
- Number of Units
  
  1
- Program Version
  
  PHIUS+ 2015 Source Zero
- ADD'L Certification Badges
  
  PHIUS+ Source Zero
- INT. Conditioned Floor Area
  
  1097 ft²
- Status
  
  Certified
- Design Certification
  
  September 29, 2016
- Final Certification
  
  April 13, 2018
- Construction Completion
  
  2018
- ASHRAE Climate Zone
  
  5A - Cool - Humid
- Region
  
  Northeast

Performance

- Annual Heating Demand
  
  4.6 kBTU/ft².yr
- Annual Cooling Demand
  
  0.38 kBTU/ft².yr
- Peak Heating Load
  
  4.92 kBTU/ft².yr
- Peak Cooling Load
  
  0.73 kBTU/ft².yr
- Site Energy Use Index (EUI)
  
  20.19 kBTU/ft².yr
- Site Energy Use Index (w/Renewables)
  
  11.94 kBTU/ft².yr
- Compliance Software
  
  WUFI Passive
- Source Energy (Non-Residential)
  
  63.79 kBTU/ft².yr
- Source Energy (Non-Residential w/Renewables)
  
  37.73 kBTU/ft².yr
- Air Tightness (per enclosure area)
  
  0.015 CFM50/ft²

Enclosure

Systems & Equipment

- Measured Ventilation Fan Efficiency
  
  0.4 W/cfm
- Heating System Manufacturer
  
  Fujitsu
- Heating System Product Name
  
  9RLS3
- Heating System Type
  
  Air Source Heat Pump
- Renewable Energy Type(s)
  
  On-Site PV