"
Humans develop polymer fume fever at an exposure of 0.4 milligrams, 500 times less than the amount that had no effects in dogs. This finding from DuPont raises more questions about the safety of Teflon than it answers, and suggests that humans may be hundreds of times more sensitive than animals to a range of toxic Teflon byproducts. "
400 micros (
millionths of a gram ) of pyrolized PTFE .
Fluoropolymers are not an ideal family of materials to be used on/in a vaporizer device.
Materials like PTFE ( "Teflon" ) ,FKM ( "Viton" ) and others of the same family
of Carbon-Fluorine polymers are not to be considered totally safe .
Because ,under certain circumstances ,can pose serious health hazards.
Vaporizer material safety is an issue.
A serious one.
And at the moment there are no official safety standards set - to be met ,
at least as far as I'm aware .
A vaporizer is a device that processes atmospheric air
-
enriches the atm. air with heat extracted substances -
into an effective aerosol with the final purpose of inhalation by humans.
Thus ,any vaporizer device should be manufactured under the same
strict standards and directives like the rest of medical devices are,
no matter if it is latter to be approved as one or not.
There's a vast list of materials that can pose health issues and/or hazards.
Be quite sure -
at least I am -that quite a few of these materials are being
used and are to be found ,even at the most famous and/or high quality vaporizers.
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Vaporizing is an ascending trend.
More an more people revert to this method ,for consuming mainly herbal cannabis or
various forms of it's extracts.
The increased demand attracts business interest .
New brands and new devices will keep popping up ,like mushrooms.
But there are none officially established conditions and guidances about vaporizing device safety.
Thing is that only few of them can be really considered as (safe) vaporizing devices.
Most of them are exactly what their manufacturers sell them as to be .
"Aromatotherapy devices" or even " Air heaters ".
Terms established long ago before the -relatively recent -FDA & EU laws about smoking & vaporizing devices .
Quite oftenly a well known disclaimer notice is following :
"
Caution :This is not a medical device ,neither is meant to be used as such . "
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An
ideal (
medical grade at it's tops )
vaporizer would filter out even the atmospheric air and load contaminants like -
but not limited to : SOx gases ,CO ,NOx gases,PM10 & PM2.5 particles ,PAHs,VOCs from herbicides ,fungicides & pesticides .
A more realistic ( and more affordable ) approach would be that the vaporizing device should not contaminate further the final aerosol,under any possible conditions.
Let all the contamination be that of the ambient atmospheric air and of the particular load used.
A 100% inert device.
Neither simple or easy to be achieved ,actually.
Cheers.
Thank you 
!