Criterion 11: Achieving indoor comfort requirements (visual/ thermal/ acoustic)

• In GRIHA version 2015, which of the following: Ecotect or SP41 (handbook) or SEC, should be used as the source for Annual Solar Insolation?
• Which simulation software can be used to calculate VLT, U value and other such parameters of a high performance glass with sun control film?
• Windows of which areas are exempt from meeting SHGC requirements?
• If BIPV is proposed for Southern walls, then will it be treated as transparent or opaque for WWR calculation?
• As the building is going to be occupied only during early morning and late evening, the effect of increasing SHGC is insignificant on the EPI. So how can we demonstrate compliance?
• What method of day lighting analysis should be followed if a project has 3 typical towers? Specifically, if there is a notable difference between the day lit area of all three towers.
• What is the corresponding temperature range for the 70% relative humidity range in non- conditioned areas?
• Where can we find the fresh air requirements for all conditioned zones to comply with NBC 2005?
• How can a builder make sure that the tenants follow GRIHA requirements in their leased apartments?
• Kindly confirm if GRIHA accepts Autodesk ECOTECT software for Hourly calculations of Thermal Comfort compliance and Energy Modeling & Simulation in Criterion 14 (GRIHA Version 3).
• Are dual switch systems with manual on/off switches and dual lighting circuits accepted as lighting controls? Will the project satisfy ECBC requirements and be GRIHA compliant?
• Are day light sensors acceptable as lighting controls and will they satisfy ECBC norms and GRIHA requirements?
• If the SHGC value for a particular façade is little less than the other facades, then is it possible to ignore the value and follow any of the remaining façade values for the whole building?
• Air-conditioned buildings need to have ACH (air changes) requirements based on the NBC. Is it mandatory for the non-air-conditioned buildings also to meet the ACH as recommended by NBC?
• Is it required to achieve lux level values as per NBC for the whole office space as an average or just under the light fixtures where the work stations will be placed?
• Can a project show compliance with Criterion 13, GRIHA Version 3 requirements by submitting average WWR value?
• How should the window height be calculated in the day lit zone area calculations in Criterion 13, GRIHA Version 3?
• Does GRIHA allow for mutual shading from neighboring buildings and trees?
• Can the SHGC value of a residential building be taken for a hostel building?
• Is complying with U-values mandatory in GRIHA?
• How can the multiplication factor for an overhang and a vertical fin be calculated?
• With reference to criterion 13, GRIHA Version 3, while calculating daylight area and daylight factor, should the kitchen be considered as well? Is kitchen considered as regularly occupied area or is exempted?
• For SHGC calculation in criterion 13 (GRIHA Version 3), the northern facade is at an angle so how shall we determine the direction of the fenestration.
• What is the u value requirement for glazing under GRIHA version 3?
• How can the daylight analysis be performed for a core and shell project with no interior layouts?
• Kindly share the correct methodology to carry out SHGC calculation for an inclined glazed façade in criterion 13 (GRIHA Version 3). How shall the shading projection be calculated?
• Do the exterior windows in non-livable areas such as store room, toilet, etc. need to meet the SHGC/shading criteria as per criterion 13 (GRIHA Version 3)?
• The Day light Factor for Laboratories is specified as 2.5-3.8 in in criterion 13 (GRIHA Version 3). Similarly, Classrooms have Daylight Factor specified as 1.9-3.8. Is this a range?
• What should be considered as recommended Daylight Factor for meeting rooms and auditoriums in criterion 13 (GRIHA Version 3)?
• What daylight factor should be considered for the following spaces in criterion 13 (GRIHA Version 3): 1. Hostel rooms 2. Guest rooms 3. Community dining area