I can get my coal forge lit and be forging before my propane forge comes up to heat and shutting it down is just as quick. I have no problem with sparks or embers and the forge is about two feet from a combustible wall and the shop is in a heavily wooded area YMMV though.
BTW... Welcome to IFI, We won't remember your location once leaving this post, hence the suggestion to edit your profile to show it.