Today was the 2nd gas fireplace insert in 3 weeks that was finished without a zero clearance firebox and not installed in a masonry firebox either. Let this serve as a warning for those that "tinker" with fireplaces part-time. Make sure you or your techs know what they are looking at (and for) when they are doing service. You do not want to miss this and be the last to touch it before an "accident". Yes, I infracted both and shutem down. Has anyone else seen this? I suspect there is a small percentage of these installed everywhere.