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Table 1 School descriptions and ventilation capacities

From: Predictors of indoor absolute humidity and estimated effects on influenza virus survival in grade schools

  Size in square feet (year of construction) Number of rooms Sensor placement HVAC systems
School 1 Main Building: 33,095 (1950) 15 classrooms Intra-Room Variability: 5 sensors in each of 3 rooms Air Exchange: 15 cubic feet per minute (CFM) per person
  Addition: 16,813 (1965) 7 student service rooms Inter-Room Variability: 14 unique rooms Heat: Steam and hot water
    Inter-School Variability: 32 combined rooms between schools  
School 2 Main Building: 145,279 (1962) 29 classrooms Intra-Room Variability: 5 sensors in 1 room Air Exchange: 15 cubic feet per minute (CFM) per person
  Addition: 20,704 (1989) 25 student service rooms Inter-Room Variability: 18 unique rooms Heat: Hot water
    Inter-School Variability: 32 combined rooms between schools