# Adaptation of the SBTool for Sustainability Assessment of High School Buildings in Portugal--SAHSBT
## 3 Materials and Methods
#### Categories and Indicators
This indicator in the SAHSB\({}^{\text{PT}}\) methodology is assessed using a form that evaluates the annual drinking water consumption and potable water consumption for irrigation and the average daily water consumption of each interior and exterior device. This indicator is similar to that used in the SBTool\({}^{\text{PT}}\)-STP for Office Buildings. **Indicator 12--Water treatment and recycling**  
The objective of this indicator is to promote the decrease of water consumption inside buildings in the use phase, using recycling devices and reusing rainwater, groundwater, or greywater. It has low reference values and may increase with the updating of the methodology. This indicator in the SAHSB\({}^{\text{PT}}\) methodology is concerned with annual per capita (//year) use of devices that drain into the recycling system. The reference practices and method of calculation for this indicator are the same as those used in the SBTool\({}^{\text{PT}}\)-STP for Office Buildings; therefore, this indicator is similar to that used in the SBTool\({}^{\text{PT}}\)-STP for Office Buildings. **Indicator 13--Collection and reuse of Rainwater**  
The objective of this indicator is to ensure groundwater recharge and reduce the peak flow in rainwater drainage systems. This indicator in the SAHSBPT methodology is concerned with the annual per capita (I/year) value of the building potential for Rainwater management. The reference practices and method of calculation for this indicator are the same as those used in the SBToolPT-STP for Office Buildings; thus, this indicator is similar to those used in the SBToolPT-STP for Office Buildings. **C6. USE HEALTH AND COMRORT**  
The productivity, health, and quality of life of building occupants are related to internal environmental quality. It is important to maintain comfort indicators in a sustainability assessment of school environments, because students spend long periods of time in the school building, and discomfort interferes with students' concentration, learning, and health [22]. This category includes five indicators: \"indoor air quality\" (I14); \"thermal comfort\" (I15); \"visual comfort\" (I16); \"acoustic comfort\" (I17); and \"ergonomic comfort\" (I18). **Indicator 14--Indoor air quality**  
The objective of this indicator is to promote an adequate level of air quality inside the buildings. This indicator in the SAHSBPT methodology is concerned with the renewal rate of the building air and the finishing materials with low volatile organic compounds (VOC) content. The method of calculation for this indicator is the same as that in the SBToolPT-STP for Office Buildings; however, the reference practices are different. **Indicator 15--Thermal Comfort**  
The objective of this indicator is to promote and reward the existence of a comfortable thermal environment inside the building. This indicator in the SAHSBPT methodology is concerned with the level of thermal comfort, especially during the summer and winter seasons. The reference practices for this indicator are different than those used in the SBToolPT-STP for Office Buildings; nevertheless, the method of calculation is the same. Schools that have a control system for temperature do not need to be evaluated by this indicator. **Indicator 16--Visual Comfort**  
The indicator in the SAHSBPT methodology considers the illumination levels provided by natural lighting in all areas of the building that are occupied by users and the illumination levels provided by artificial lighting in all the areas of the building that are occupied by users. The method of calculation for this indicator is similar to that used in the SBToolPT-STP for Office Buildings, although the reference practices are different. **Indicator 17--Acoustic Comfort**  
The objective of this indicator is to promote the adoption of solutions that enable a high level of acoustic comfort for occupants.