With winter immanent, I'm looking at putting some heating in my shop
so I can work and not freeze. I've heard people say that any
kind of open flame heating is dangerous because it could ignite saw
dust--I've heard others say this is rubbish.

Could people share their opinions and advice? Is an open
flame heater dangerous? What type of heating do you use?
Any recommendations to heat my shop: it's about 20x20
with a 12 foot ceiling.

Thanks,
Dave.