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Project 1740

1419 Apartments

Seattle, Washington

Building Function

Multifamily
Project Type

New Construction
ASHRAE Climate Zone

4C - Mixed - Marine
Status

Final Certified
INT. Conditioned Floor Area

42725 sq. ft.

Core Project Team

Phius CPHB

Sloan Ritchie
Phius Certified Verifier

Cybil Tribie
Phius CPHC (Secondary)

Dan Whitmore
Phius CPHC (Lead)

David Fox
Project Submitter

Dan Whitmore

Project Information

- Architecture Planning
  
  b9 Architects
- Building Owner
  
  24&U LLC
- Mechanical Systems Designer
  
  Staengl Engineering
- Construction Company
  
  Cascade Built
- Building Function
  
  Multifamily
- Project Type
  
  New Construction
- Construction Type
  
  Wood Frame
- Number of Units
  
  107
- Number of Stories
  
  8
- Program Version
  
  Phius CORE 2021
- All Electric
  
  Yes
- INT. Conditioned Floor Area
  
  42725 sq. ft.
- Status
  
  Final Certified
- Design Certification
  
  January 11, 2023
- Final Certification
  
  August 12, 2024
- ASHRAE Climate Zone
  
  4C - Mixed - Marine
- Region
  
  Northwest

Performance

- Annual Heating Demand
  
  2.75
- Annual Cooling Demand
  
  1.04
- Peak Heating Load
  
  4.62
- Peak Cooling Load
  
  1.88
- Site Energy Use Index (EUI)
  
  25.59
- Compliance Software
  
  WUFI Passive
- Source Energy (Residential)
  
  4609
- Air Tightness (per enclosure area)
  
  0.059

Enclosure

- Wall 1 Type
  
  Exterior Load Bearing Double-Stud
- Wall 1 R-Value
  
  24
- Wall 1 Insulation Type
  
  Fiberglass, GPS, Mineral Wool (Board)
- Wall 2 Type
  
  Exterior Load Bearing Double-Stud
- Wall 2 R-Value
  
  27
- Wall 2 Insulation Type
  
  Fiberglass, GPS
- Wall 3 Type
  
  Other
- Wall 3 R-Value
  
  8
- Wall 3 Insulation Type
  
  Mineral Wool (Board)
- Roof 1 Type
  
  Unvented Roof
- Roof 1 R-Value
  
  51
- Roof 1 Insulation Type
  
  PolyIso, Fiberglass, Other
- Roof 2 Type
  
  Unvented
- Roof 2 R-Value
  
  47
- Roof 2 Insulation Type
  
  PolyIso, Fiberglass, Other
- Floor Type 1
  
  Slab on Grade
- Floor 1 R-Value
  
  10
- Floor 1 Insulation Type
  
  EPS
- Floor Type 2
  
  Slab on Grade
- Floor 2 R-Value
  
  1
- Window Manufacturer 1
  
  Kohltech
- Window Product Name 1
  
  Value Eurotek 70 Tilt Turn
- Whole Window U-Value 1
  
  0.17
- Window Glazing SHGC 1
  
  0.32
- Window Product Name 2
  
  Value Eurotek 70 Fixed
- Whole Window U-Value 2
  
  0.26
- Window Glazing SHGC 2
  
  0.27
- Window Product Name 3
  
  451UT
- Whole Window U-Value 3
  
  0.33
- Window Frame Material 3
  
  Aluminum
- Window Glazing SHGC 3
  
  0.24
- Door Manufacturer
  
  CODEL DOORS
- Door Product Name
  
  SF20F Flush-Glazed Door
- Whole Door U-Value
  
  0.24
- Door Frame Material
  
  Fiberglass

Systems & Equipment

- Ventilation System Manufacturer
  
  Swegon
- Ventilation System Product Name
  
  Swegon Gold RX14 ERV-E
- Ventilation System Layout
  
  Semi-Centralized
- Ventilation System Type
  
  ERV
- Sensible Recovery Efficiency
  
  84
- Latent Recovery Efficiency
  
  80
- Measured Ventilation Fan Efficiency
  
  0.43
- Heating System Manufacturer
  
  LG
- Heating System Product Name
  
  Aggregate LG Heat Pumps, LSU09HSV5 (13x), ARUN060GSS4 (1x), ARUM072BTE5 (1x)
- Heating System Type
  
  Electric Resistance
- Heating System Rating
  
  COP
- Heating System Performance (COP)
  
  3.05
- Cooling System Manufacturer
  
  LG
- Cooling System Product Name
  
  Aggregate LG Heat Pumps, LSU09HSV5 (13x), ARUN060GSS4 (1x), ARUM072BTE5 (1x)
- Cooling System Type
  
  Air Source Heat Pump
- Hot Water System Manufacturer
  
  Sanden
- Hot Water System Product Name
  
  Sanden HPWH - GS4-45HPC
- Hot Water System Layout
  
  Centralized
- Hot Water System Type
  
  Split Heat Pump Water Heater
- Dryer Type
  
  Non-Vented