Insulate and Air Seal or Remove Chimney
很难弄清楚如何处理我的翻新项目端墙上的烟囱……
Quick recap:1950s 1.5 story house, Zone 5 (Ohio). Significant remodel, including 3″ of exterior foam on the walls. Primary air barrier is fully-adhered on the original sheathing, primary water barrier is either the same as the air barrier, or the surface of the foam.
The problem：房子有一个壁炉，作为客厅“特色墙”的一部分。墙的另一侧是附属的车库。车库不如房屋高，因此烟囱的车库屋顶上方是2楼墙的半挡 /一半。烟囱中的第二烟供应燃气热水器和炉子，将退役。这留下了3个主要领域和许多过渡以应对：
1: First floor — My instinct is to make the entire chimney and fireplace “inside”, wrapping the air barrier and exterior foam around the garage side of the chimney (with appropriate spacing, and firecode drywall on the garage side of the foam).
2: First to second floor / garage attic — My instinct is to air seal with metal at the first to second floor transition, and have the entire chimney “outside” here (exposed in the garage attic)
3：车库屋顶上方 - 这是最棘手的部分，我不确定如何处理2楼墙 /覆层和烟囱侧之间的垂直过渡。看来这将永远是一个薄弱的领域。是否有效地将整个烟囱装在2楼的墙壁上，底部有某种良好的闪光 /散装水管理，都没有关系吗？
感谢有关如何处理这种烟囱的任何想法或细节！
谢谢！
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答复
将砖烟囱倒入地面天花板的水平并用高于该点的金属烟囱代替它是一种选择吗？
乔尼，
Charlie's solution is what I'd suggest exploring too. it gets rid of the huge thermal bridge, and simplifies flashing at the roof.
一般而言，闪光做得好似乎很难。砖烟囱的另一个挑战是，至少在这里，传统的闪光是铅，如果您想避免使用这种有毒物质，那么最好的持久替代品可以与砖接触是铜，但似乎很难找到一个知道如何进行铜闪烁的人。
由于特征墙的美学价值似乎否定要删除它，所以这个对话马丁·霍拉迪（Martin Holladay）随后的文章可能对您感兴趣：Is My Abandoned Chimney Hurting My Energy Efficiency?. He outlines an air sealing and insulating method for unused chimneys.
Thanks for the thoughts! Charlie and Malcom, if I'm understanding correctly you'd propose removing all the masonry above the first-floor ceiling level, installing a woodburning insert in the fireplace opening, exhausted through a new insulated metal chimney up through the remainder of the existing masonry then on its own through the second floor (within the thermal envelope) and then through the roof (easy to flash and seal with existing metal chimney products)?
I suppose my hesitation with this is that it sounds like a lot of work -- but then again everything I'm doing is a lot of work I'm just not really familiar with chimneys and fireplace inserts. But, I'll research this option more.
Kiley，感谢您的链接。您看不到我看不到卸下壁炉（以及两侧的石材周围和内置橱柜） - 我也想保留以某种方式燃烧木材的能力。我知道这与绿色建筑社区中的一些人可能有些不一致，但是我从固执的角度来看，这是否则仅是电动的 - 此外，偶尔还可以使用它的氛围。
乔尼，
I'd take the chimney down to the level of the attic insulation and then go metal. Alternately, I'd take it down to a foot or so shy of the roof and do the same thing, then frame up walls around it you could insulate. You could either put in an insert, or just leave the existing fireplace.
I agree with the resilience advantage of having some way to burn wood. That might be a wood stove on the hearth, as that can function without electricity better than an insert.
You could take the chimney down to different levels--I don't have a strong or well informed opinion about how far to go. That is substantial work, so is getting the flashing right and doing any of the other options you've talked about.
更新此信息：我与当地的壁炉和烟囱公司进行了交谈。我现有的烟囱的矩形烟道太小，无法使用任何现代绝缘衬里，因此，基本上，我想要某种插入物或木炉的唯一选择是将烟囱放下大部分时间，并用金属类A代替烟囱。昂贵的工作！
This leads to another question...
The dealer is trying to sell me on a Blaze King Sirocco insert. It does look pretty nice, but it's $4400 by itself; with all the labor and chimney pipe I'm up to $10k. Also, the blaze king doesn't support external combustion air -- though I've seen some people say that external combustion air isn't necessarily helpful anyway, and that simply providing makeup air to the room is better. Are there other inserts I should be looking at? Or should I be considering removing the entire masonry thing and just having a stove?