Figure 3
The three-section table compares category weightings and concepts for three “Green Certification System” standards: “B R E E A M N C v 7 Standard (according to U K weighting)”, “L E E D (B D plus C) v 4.1 Standard”, and “W E L L v 2, Q 2 Standard”. The leftmost column lists the certification system name for each horizontal block. The central columns, headed “Categories slash Concepts (showing the weight of each category)”, list category names with percentages, and the rightmost columns list corresponding categories or concepts with their own percentages and, for W E L L, the number of points. In the B R E E A M block at the top, the left half lists “16.5 percent Energy (energy efficiency, renewable energy, carbon reduction)”; “16 percent Materials (sustainable sourcing, waste reduction)”; “10.5 percent Land Use and Ecology (biodiversity protection, green spaces)”; “8 percent Pollution (air and water pollution control)”; and “7 percent Waste (waste management, recycling)”. Opposite these, the right half shows “15 percent Health and Well-being (indoor air quality, thermal comfort, daylight, noise control)”; “11 percent Management (construction process, regular assessment)”; “8.5 percent Transport (public transit access, cycling infrastructure)”; “7.5 percent Water (water efficiency, rainwater harvesting)”; and “0.0 percent Health and Well-being Hazards”. In the middle L E E D block, the left half lists weighted categories and points: “33 points equal 32 percent Energy and Atmosphere (energy efficiency, renewable energy, carbon reduction)”; “13 points equal 17 percent Materials and Resources (sustainable sourcing, waste reduction)”; “11 points equal 10 percent Water Efficiency (water conservation, rainwater harvesting)”; “10 points equal 8 percent Sustainable Sites (land use efficiency, habitat protection)”; and “16 points equal 8 percent Location and Transportation (public transit access, reduced car dependency)”. On the right half, L E E D categories include “16 points equal 15 percent Indoor Environmental Quality (air quality, thermal comfort)”; “1 point equals 1 percent Integrative Process (holistic design for occupant health)”; “4 points equal 4 percent Regional Priority (local health and environmental priorities)”; “6 points equal 5 percent Innovation (sustainable design strategies)”; and “Total Possible Points equal 110 points”. In the lower W E L L block, the left half lists concepts with percentages and points: “16.7 percent (asterisk) Air (indoor air quality, V O C reduction): preconditions equal 10, optimizations equal 10 (20 points)”; “12.5 percent (asterisk) Water (clean water access, water filtration): preconditions equal 3, optimizations equal 6 (14 points)”; “12.5 percent (asterisk) Materials (non-toxic materials, waste management): preconditions equal 3, optimizations equal 10 (21 points)”; “8.3 percent (asterisk) Mind (stress reduction, mental health support): preconditions equal 2, optimizations equal 9 (19 points)”; and “4.2 percent (asterisk) Sound (noise reduction, acoustic comfort): preconditions equal 1, optimizations equal 8 (18 points)”. The note at the bottom reads, “Asterisk, The weight is calculated according to the number of precondition requirements of each concept. The total number of precondition features for all concepts is 24”. The right half lists “16.7 percent (asterisk) Community (inclusiveness, social equity): preconditions equal 4, optimizations equal 17 (50 points)”; “8.3 percent (asterisk) Nourishment (healthy food options, nutritional transparency): preconditions equal 2, optimizations equal 12 (16 points)”; “8.3 percent (asterisk) Light (daylight exposure, circadian lighting): preconditions equal 2, optimizations equal 7 (18 points)”; “8.3 percent (asterisk) Movement (active design, ergonomics): preconditions equal 2, optimizations equal 9 (21 points)”; “4.2 percent (asterisk) Thermal comfort (personal thermal control): preconditions equal 1, optimizations equal 10 (16 points)”; and “4.2 percent (asterisk) Innovation: preconditions equal 0, optimizations equal 6 (28 points)”.Comparison of BREEAM, LEED, and WELL categories and point allocations. Source: Authors' own work