I'm not sure it is. I'm using the non-chlorinated version, and if I kick the heater on after I have sprayed some (not an explosive level) and the smell is still in the air, the air turns foul very quickly (as the fumes are going through the (torpedo) heater I suspect).

I always completely air out the garage and throw away rags outside before starting the heater. Really bad stuff.

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Gone to the dark side

- Jeff