RE: How to print ASA safe in a not so good ventilated basement?
If you are going to be actively moving air out of the chamber for ventilation purposes, you are going to need to replace it with heat.
Not necessarily, it depends. If you have a pretty well sealed printer, you're able to prevent air pollution leaking into the room by just creating a slight negative pressure in the chamber. In other words, only moving a little bit of air with your exhaust fan and thus only exhausting a little bit of hot air out of the chamber.
The advanced filtration is grossly insufficient for VOCs. The little bit of carbon they have in their, you will still have fumes passing right through. I ran a half spool of ABS CF Core, the carbon is shot. The 600hrs of runtime is a joke, the HEPA filter yes, VOC no, maybe 6 hrs and then maybe 70% effective when it was new. Vent outside if you can. I'm tossing the rest of my ABS, I can't vent outside. Working on improving VOC filtering too.
I've never printed ABS. I have printed looooots of PLA, some PETG and occasional ASA. Total print hours for me has been around 1700 hours. I only now recently changed the air filter just for safety, but I'm not even sure it was needed to be honest. I've got an air quality monitor next to the printer at all times. Not only does the air filter work (if my expensive air quality monitor is to be believed), I am also very satisfied with the longevity of the filter when printing with aforementioned materials.
That said, PLA is several orders of magnitude cleaner than ABS according to tests, but I am a bit skeptical towards the carbon filter was depleted after a few hours of ABS. Keep in mind that most air quality measurers can't distinguish between different types of VOCs, and that they give out false flags frequently. For example, normal water vapor can trigger the air quality measurer. So if you're boiling spagetti in the kitchen whilst printing with ABS, you might think that you're dealing with ABS fumes when the VOCs measured is just detecting water vapor.