Also leads with "It's not clickbait", then it is clickbait. Really the peak of modern Youtube scum.

Did you actually watch the video?

He literally presents a list of reasons around 5:12. Then he goes on to describe how formaldehyde already affects him.

Resin priting can be a lot of fun, but he's correct: that shit is toxic. It needs to be respected, and he's also correct in pointing out the carbon filter on many printers is basically a placebo for the consumer.

Still don't believe him? Fine. Go checkout the small book that is the set of warnings with this stuff from a resin producer: https://entropyresins.com/safety/epoxy-safety-tips/

He mentions VOCs within the resin, just because you can't wrap your head around why inhaling "volatile organic compounds" can be bad for you, does not mean it's wrong. Take proper precautions to ventilate the area while printing resin, please.

Yeah the term "heat exchanger" describes a lot of things.

Probably an ERV or HRV for ventilation.

https://en.m.wikipedia.org/wiki/Heat_recovery_ventilation

https://en.m.wikipedia.org/wiki/Energy_recovery_ventilation

It's essentially a heat/cooling recovery unit so you're not simply pumping your A/C out into the world and wasting energy. It allows you to swap the air in a room out, without losing its cool/heat by simply pumping in outside air. The video explains what he used.

Thanks. I'm no expert at this chemistry, but this is the better reference IMO

Here is an alternative Piped link(s): https://piped.video/ht4tbCiFxeM?si=fQuV-vS4V0crt6Hf

Piped is a privacy-respecting open-source alternative frontend to YouTube.

I'm open-source, check me out at GitHub.

PLA is used for medical implants, because it breaks down into lactic acid inside the body, so it's almost certainly safe.

The correct way is basically this: Get a ventilation fan, and exhaust the air around the resin printer to the outside of your home. Learn proper safety procedures, with correct nitrile gloves, and VOC-rated respirator and use that to ensure you don't get resin on your skin. Resin print in the garage if possible. Resin likes warmer temperatures anyhow, it helps the chemical reaction occur. Make sure this ventilation fan is AT the window, because you don't want any of the pressurized air to leak back into your living space. You want it to suck air out of the room and vent it outside.

An upgraded system is going to cost more, but if you're in an air conditioned area - it will save you air conditioning costs. You need a heat recovery ventilator, and typically that will come with 2 blower fans, this isn't absolutely necessary but would be the "correct" way to do it. I'd opt for this if you're resin printing inside your home office and it's going to be a permanent thing, or if you're running lots of resin printers at once.