I had not really heard of hash oil so I went and read the article - seems they use it for a more potent high. I was hoping someone might have been trying to distill (if that’s the word) it for a more medicinal reason - say for an additive to a rub for pain killing or something. I have heard for so long that cannaboids have great potential for new pain killing drugs - surely the new laws would allow for further research in this area - that is if that was not just BS from those who like to smoke it!
Another source for info would be to read about the stock symbol GWPH. I can't remember the name of the company, but they are working on several chemicals removed from pot. They are excited about a treatment for MS right now. The stock looks risky, but maybe they will hit on something, no pun intended.
You don’t have to use heat in the BHO method. The only reason one would is if one is in a hurry. Nevertheless it’s still dangerous and silly to do it indoors with heating elements present, where even an high wattage light bulb can set it off.
It’s not done to make a more potent high, it’s done to make a more convenient and portable high by using it for edibles. It’s also used mainly for less than grade B marijuana — as the article describes it’s made from the chaff and stems of the plant ... which is silly because the stems will yield nothing but foul tasting Chlorophyll.