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Project 1750

60 Stearns

Cambridge, Massachusetts

Building Function

Single-Family
Project Type

New Construction
ASHRAE Climate Zone

5A - Cool - Humid
Status

Final Certified
INT. Conditioned Floor Area

3901 sq. ft.

Core Project Team

Primary Reviewer

Al Mitchell
Phius Certified Rater

Michael Browne
Phius CPHC (Lead)

Tagore Hernandez
Project Submitter

Tagore Hernandez

Project Information

- Developer
  
  Betsy Harper | Birchwood Sustainable Development
- Building Owner
  
  Betsy Harper | Birchwood Sustainable Development
- Construction Company
  
  Group Design Build Inc
- Building Function
  
  Single-Family
- Project Type
  
  New Construction
- Construction Type
  
  Wood Frame
- Number of Units
  
  1
- Number of Stories
  
  4
- Program Version
  
  PHIUS+ 2018 Source Zero
- ADD'L Certification Badges
  
  PHIUS+ Source Zero
- All Electric
  
  Yes
- INT. Conditioned Floor Area
  
  3901 sq. ft.
- Status
  
  Final Certified
- Design Certification
  
  June 23, 2022
- Final Certification
  
  August 30, 2022
- ASHRAE Climate Zone
  
  5A - Cool - Humid
- Region
  
  Northeast

Performance

- Annual Heating Demand
  
  4.94
- Annual Cooling Demand
  
  2.97
- Peak Heating Load
  
  2.84
- Peak Cooling Load
  
  2.63
- Site Energy Use Index (EUI)
  
  7.62
- Site Energy Use Index (w/Renewables)
  
  -6.86
- Compliance Software
  
  WUFI Passive
- Source Energy (Residential)
  
  4068
- Air Tightness (per enclosure area)
  
  0.022

Enclosure

- Wall 1 Type
  
  Framing with Continuous Insulation
- Wall 1 R-Value
  
  29
- Wall 1 Insulation Type
  
  Mineral Wool (Board)
- Wall 2 Type
  
  All Insulation within Framing
- Wall 2 R-Value
  
  24
- Wall 2 Insulation Type
  
  EPS
- Roof 1 Type
  
  Vented Above Deck
- Roof 1 R-Value
  
  49
- Roof 1 Insulation Type
  
  Mineral Wool
- Roof 2 Type
  
  Vented Above Deck
- Roof 2 R-Value
  
  49
- Roof 2 Insulation Type
  
  Mineral Wool
- Roof 3 Type
  
  Vented Above Deck
- Roof 3 R-Value
  
  52
- Roof 3 Insulation Type
  
  Mineral Wool
- Floor Type 1
  
  Basement Slab
- Floor 1 R-Value
  
  28
- Floor 1 Insulation Type
  
  EPS
- Floor Type 2
  
  Overhang Floor
- Floor 2 R-Value
  
  48
- Floor 2 Insulation Type
  
  Cellulose
- Window Manufacturer 1
  
  CDM
- Window Product Name 1
  
  3 Pane Wood Fixed Window
- Whole Window U-Value 1
  
  0.15
- Window Frame Material 1
  
  Wood
- Window Glazing SHGC 1
  
  0.54
- Window Manufacturer 2
  
  CDM
- Window Product Name 2
  
  3 Pane Wood Operable Windows
- Whole Window U-Value 2
  
  0.14
- Window Frame Material 2
  
  Wood
- Window Glazing SHGC 2
  
  0.54
- Window Manufacturer 3
  
  CDM
- Window Product Name 3
  
  3 Pane Wood Fixed Window Mulled
- Whole Window U-Value 3
  
  0.14
- Window Frame Material 3
  
  Wood
- Window Glazing SHGC 3
  
  0.54
- Door Manufacturer
  
  CDM
- Door Product Name
  
  3 Pane Wood Operable Door
- Whole Door U-Value
  
  0.15
- Door Frame Material
  
  Wood

Systems & Equipment

- Ventilation System Layout
  
  Centralized
- Ventilation System Type
  
  ERV
- Sensible Recovery Efficiency
  
  83
- Heating System Type
  
  Air Source Heat Pump
- Hot Water System Layout
  
  Centralized
- Hot Water System Type
  
  Heat Pump Water Heater
- Renewable Energy Type(s)
  
  On-Site PV
- Renewable Energy Annual Production
  
  16563
- Renewable Energy System Size
  
  12.75