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Since we have been making and selling foam cutters here in the US for many years, I called DOW chemical and asked them if there were any dangers cutting EPS (expanded polystyrene) foams with a hot wire. They told me that the only off gas is hydrocarbon which is the same as burning wood. If it reached the flame point of 800 degrees, it would give off benzyne. Foam melts at 180 degrees. They said that there is no toxicity to the fumes that come off when cutting EPS with a hot wire, but that you should still cut in a ventilated area. The spray glue we sell on the other hand . . . <br />Dave <br />Hot Wire Foam Factory
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