How do I know which surface needed to be flipped when doing radiation analysis

When I am using ladybug tool to do Radiation Analysis, it sometimes showed the radiation of inside surface. So I need to manually flip them to show the outside. But when I compare the direction of surfaces which show inside radiation and outside, the xyz arrows are all same, which means I can not recognize them if I didn’t find them wired. I am wondering is there anyway to show which surface need to be flipped? Thank you!!!
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The Dir command in Rhino may be helpful, it has an arrow showing the direction of the surface of analysis

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That helps! Thank you so much!