Well... the only sure facts i do know:

The boiling point of many cannabinoids (THC included) is about 350F-390F. So any temperature above it will boil off some cannabinoids.

The ideal temperature for decarboxilating the THCA to THC is 220F. So heating the weed at this tempertaure can actually improve the weeds potency. Decarboxilation also happens by itself, during the curing process, but its slow, and thats why it can be made faster by heating.

I dont know if heating changes the taste noticeably. I always make hash oil with my weed, so it always tastes like hash oil... :stoned: