Not seen here, as in Indonesia, using the waste heat from the AC to heat or preheat water. Put a copper coil in a tank and connect it before the heatX in the outside AC unit,
Well, he's not in Chiang Mai but if you contact him I am sure he will recommend someone hear you. He does go upcountry to do group lessons.
How to contact him? Use the internet and your grey matter.
"Wbu is a slang term that has different meanings depending on the context. It can mean what about you, what's been up, or someone who likes cock. "
https://www.urbandictionary.com › define.php?term=wbu
This explains a lot about the OP's myriad of topics.🤔