Updated 6/5/2018:
Yesterday I did play around with my Lionel Industrial Smokestacks for my Open Hearth. I've cannibalized 2 stacks (taken the middle section) and extended 2 others with them.
That left me with 2 "shorty" smokestacks (I have only shown the one; the other needs some repairs). Anyway, I wired up 3 of them.
George