my mind is blown if i think this is what it means .... so iso is cool to use ?
Personally I dont think isopropyl is safe to use unless you use a vacuum and even then you have to be careful. Fadedawg is correct that if you purge to below FDA standards you are safe. The challenge is that there is no way that a home extractor could determine the concentration of isopropyl alcohol.
You would also need to consider that most of the research on isopropyl alcohol focuses on inhalation from an occupational exposure perspective and not direct concentrated inhalation. Isopropyl alcohol is metabolized by the body to acetone and then to acetic and formic acid (if my memory is correct). Acetone is a nervous system depressant.
It is very difficult to remove solvent from an oil using heat alone. Excess heating also runs the risk of degredation of your THC and CBD.
My recommendation is to spend the extra money and purchase an oil vacuum pump. Robinair makes good quality pumps that hold up well as long as you regularly change the oil. If money is tight you can use a water faucet aspirator.
If you go down this path, the best way to blast is directly into round bottom flasks. I use a 500mL 24/40 1 neck round bottom (cheap on aliexpress). That way you can connect directly to the pump using a vacuum/inlet 24/40 gas adapter. Going this route is significantly less expensive (and better performance) than using a vacuum chamber.
My next run I plan on documenting my extraction with photographs.