Are butane powered vapes safe and healthy?

If you take a good long 12-15 second pull off of a butane run vaporizer several times, (jet lighter powered) looks very similar to the ubie, but is more burly, does it have any negative health benefits? I heard that some of the bi-products of burned butane aren't good for you and I would certainly hate that, as I recommended it to a friend with MS because it is healthier. Is it healthier than smoking normally? Can my friend and I continue using this without destroying bodies seriously? Keep in mind that you do several of these 12-15 second pulls... maybe 6-8 a night... If you have the know how, please let me know. I am depending on you RIU for a safe and reliable answer because it pertains to our health. Thank you very much...

Bump.........

It uses butane to heat the weed, it shouldnt exhaust the spent butane out the drag hole I would think .

Lol, I know that. I am sucking the heat from the flame (which of course must contain something... it smells kinda sweet when you test it without anything) from the end of the vaporization device, though the herb, and into my lungs!!!

Oh yes, my mistake... I see how you meant that. Yes, it exhausts the icky sticky through the drag hole with the spent burned off gases from butane...

Bumppppppppppppppppppppp!!!!!!!!!!!!!!!

I don't get your setup, or maybe it's the question. A vaporizer should have the heating element in another chamber from the weed if it's a flame and then heats up some metal or something that is surround the weed chamber correct? If so then of course no fumes are coming in except maybe some toxins from the metal which I very much doubt from a butane flame.

anyone used an ubie?