Best practice with ABS: no delamination, no cracking, no warping.

[abuharsky]

you need to build an enclosure to prevent drafts from moving across the parts...

I print without any enclosure with no delamination

[sniffle]

I print without any enclosure with no delamination

I said or... that's an environmental thing... my crazy drafty house required it... that and my wife likes to keep the house a balmy 68 degrees... so when the AC kicks on, it causes my ABS to warp... So i built an enclosure to make a stable environment for my prints