Query
Can you please share the source of reference for insolation values?
Solution
Insolation values can be found in the National building code 2005, 'Part 8 Building Services — Section 1 Lighting and Ventilation, Table 3- Total Solar Radiation...'.
You may refer to our previously answered query for more details about how to do the insolation analysis: https://grihaservice.zendesk.com/hc/en-us/articles/900000163406--8094-Solar-insolation-analysis.