Yeah, my question is if there is any benefit to cooler temps when it reaches your mouth/lungs. Like less coughing, better effects etc.
Which is what I partially answered - re: terpenes and irritation caused by.
The effects are changed by temp but again, that's the temp at the bowl, not the temp after the vapour's left the bowl. Some like it hot, some like it cooler, personal taste, not better or worse.
To try to define everything based on just a temperature isn't realistic or helpful as temperature varies all through the vape, so which temp do you mean? Cap, bowl, stem, and if the latter, then which part of the stem?
But the ticklish cough is mostly from the lighter terpenes which are more likely to be prevalent at
lower bowl temps. Post-bowl cooling (in the stem and/or bubbler) will have much less of an effect on vapour composition.
Terps are weak molecules. Temp-stepping starting with low temps assures more fragile molecules remain intact. This affects the entourage profile.
Actually, only some are weak, and in the main those are the lower boiling point terpene's; to be accurate, even the various cannabinoids are also classed as being in the terpene group.
Running a vape or dab at very high temps will break down those lighter terpene's into small fragments that recombine into other (non-active) compounds as they cool down.
Ironically, it either needs to be hot enough to damage the lighter terpene's if the heaviest one's are also going be fully vapourised, so it's something of a sliding scale in that temperature stepping range and you're quite right that the only way to get everything is to start low and work the temperature up as the lighter one's are cleared out, but in the end it's all personal preference anyway.
