I think typically the talk of VOC's comes into question at VERY high temperatures....beyond what is standard with UTH/Flex or any source of overhead heat. All plastics outgas, just at a different rate and temperature speeds it up. Yeah, PVC is one of the worst ones though....still doesn't stop all the water in a brand new house from flowing to your faucet in a PVC pex line. Doesn't stop the outgassing from a plastic water bottle into your actual water. Doesn't stop outgassing via a tupperware container into your food. You're typing on an injection molded keyboard right now most likely.
You can't escape it.
Personally, I'm not too worried about it however. I'm a toolmaker/cnc programmer...which branches into two main categories: Plastic injection molds and stamping dies.
I know a LOT of mold makers, and I know a lot of injection press operators who are around high temperature melting plastic for 12 hours a day and have done so for 10,20,30 and sometimes even 40 years without any respiratory/health issues whatsoever. OSHA doesn't mess around these days, if there's even a QUESTION as to the health effects of a certain substance....you're wearing a mask of some sorts. Doesn't need to be a conspiracy at every corner, and you can find a million scare articles via Google. ....but everyone is exposed to a boatload of plastic every day that outgasses and so far there are no studies that link exposure to reduced life expectancy of any kind in humans OR animals. Just your typical health scare articles that you can't look away from.
Using plastic water bowls? Plastic plants? Plastic hides?....think of how many plastic items you're sitting near right now. Quite a few.
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