Calculations: Air

Feature 03 Ventilation Effectiveness

  • Part 2: Demand Controlled Ventilation
    • Threshold for applying feature: Use for spaces that are both:
      • Larger: > 500 sq. ft. (46.5 sq. m.)
      • Denser: > 25 people / 1000 sq. ft. (93 sq. m.)
    • Keep CO2 levels below 800 ppm.

 

Feature 13 Air Flush

  • Part 1: Air Flush
    • 2 Options:
      • 1-flush routine:
        • Before occupancy: Flush with 14,000 cu. ft. of air / sq. ft. (4500 m3 of air per m2)
      • 2-flush routine:
        • Before occupancy: Flush with 3500 cu. ft. of air / sq. ft. (1066 m3 of air per m2)
        • After occupancy: Flush with 10,500 cu. ft. of air / sq. ft. (3200 m3 of air per m2)
          • Post-occupancy: Also need to provide fresh air: constant 0.3 CFM of air / sq. ft. (0.1 m3 / minute)

 

Feature 18 Air Quality Monitoring and Feedback

  • Part 3: Environmental Measures Display
    • Realtime displays (1 display / 10,000 sq. ft. (930 m3) for occupants, measuring:
      • Temperature
      • Humidity
      • Carbon dioxide

 

Feature 23 Advanced Air Purification

  • Part 2: Air Sanitation:
    • Threshold for applying feature:  Space has more than 10 regular occupants
    • Treat re-circulated air with either:
      • Ultraviolet radiation
      • Photocatalytic oxidation

 

Feature 26 Enhanced Material Safety

  • Part 1: Precautionary Materials Selection
    • Meet materials standards for one (or more) of the following standards:
      • Living Building Challenge Materials Petal (all imperatives)
      • 25% of products by cost (including furniture and finishes) meet either of these standards (or a combination of these):
        • Cradle-to-Cradle Material Health Certification
        • GreenScreen

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