On Jun 7, 2:38 pm, Patriarch wrote:

SNIP of good thoughts

Get a good, externally vented heater. This isn't an open construction
site we're discussing here. Fumes accumulate.

Absolutely couldn't agree more. Even radiant heaters can generate a
spark by igniting a small piece of sawdust thrown in the air that
circulates close to the elements, and on the better ones that put out
some real heat, I have seen little sparklets generated when heavy
sanding appears.

It wouldn't take much for all manner of fumes to accumulate in a shop
that small. No would it take much for noxious gasses to build up
DEPENDING on the type of heater you get as the years go by and the
machine becomes less efficient at burning its fuel.

Robert