Replies

1. 
   Matt F|2019年9月4日上午10:51|#1

   我认为，像您描述的那样，在穿透时有2英寸英寸的烟道允许任何隔热材料。岩盘没有用于这种应用程序。您将需要专门用于此类应用的产品。

   Remember that rockwool is basalt fiber+binder, so the binder can burn or at least outgass at high temps.

   我对蒸气屏障评论感到困惑。您是否认为钣金后面的墙不会被油漆，因此不会有蒸气屏障？钣金几乎是一个完整的蒸气屏障本身。

2. 
   user-6833011|Sep 04, 2019 11:43am|#2

   马特，

   The flue pipe requires 1" clearance to combustibles and isn't any more specific than that. Are you aware of insulation suitable for high temps?

   追逐大约是16英尺高的上到底部。相邻房间的天花板为8'，这就是我定义热/蒸气屏障的地方。在这一点上，我将安装一块干墙，切成中心，以允许插入金属燃烧器。Firestop基本上是一块平方的钣金，切开了一个孔，以使烟道管穿过。我建议我将Firestop附加到以减少蒸气迁移的石膏板绘制，因为塑料或Polyiso蒸气屏障似乎是一个可怕的想法。我进一步提出了另一件石膏板，第二次火墙在第一架15英寸左右的位置，有效地将隔热板夹在了干墙的两个部分之间。我的想法是，我需要最大程度地减少隔热层的空气移动，以获得最佳的R从长远来看，价值并防止绝缘材料充满污垢，认为这可能也会影响性能。这是否有意义，还是有更好的方法？

1. 
   Nathan Bean|Sep 04, 2019 12:54pm|#3

   保罗，

   Rather than paint, you might consider cutting sheet metal to fit around the firestop over the drywall, and then caulk the whole assembly with high-temperature caulk.

   For insulation, take a look at flue pipe "chimney blankets". These are made of ceramic fibers or similar materials specifically tested for high temperatures, and can even reduce the required clearance around your chimney liner. There are a number of suppliers that sell online, or you can purchase through a local firepace installer.

1. 
   Matt F|Sep 04, 2019 03:19pm|#5

   笔记that chimney liner is a different product than B-vent. Most b-vent manufacture installation guides say no insulation. Doesn’t mean it wont’t work, just that it is not approved.

   There are a lot of different chimney products and we need to be careful not to mix and match.

   也许那里有一个批准的产品，我只是不知道一种产品。

3. 
   Matt F|2019年9月4日下午12:55|#4

   I missed the gas part and was assuming Class A pipe, which needs two inches. If your appliance is rated for B vent, and you are replacing the flue with B vent, then 1" is acceptable. None of the pipes I am aware of are rated for direct insulation contact.

   我很难想象您想把火es的追逐中放在哪里。我们可能需要草图或照片。多个打火机是可以接受的。实际上，每当管道通过追逐中的地板或天花板穿过时，都会需要它们。追逐是否在外墙侧有石膏板或胶合板，还是合并了螺柱舱？

4. 
   user-6833011|2019年9月4日下午4:30|#6

   我安装一个直接发泄壁炉,所以它使用direct vent pipe, not b-vent. I understand these to be different things. It's an 8" pipe with a 5" pipe inside. The outer pipe is cool intake air. The fireplace store simply told me 1" to combustibles. You could be right that I should keep 1" clearance even to non-combustible insulation. That's still much better than what I had prior which had the old fireplace sitting outside the thermal barrier.
   追逐为2x4，从地板到Firestop，我在海湾上添加了矿物质羊毛，在螺柱上涂了Polyiso，然后在Polyiso上涂干墙。在FIRESTOP上方只是空的2x4湾。

   Hopefully the sketch helps shed some light.

   Many Thanks,
   保罗

   https://www.efireplacestore.com/chimney-pipe-buying-guide.html
5. 
   Matt F|Sep 04, 2019 05:22pm|#7

   这是一种样式的管道制造。他们的状态间隙是由设备制造定义的，空气空间不会充满绝缘。

   https://www.duravent.com/docs/product/L954_820003172_Install-Instructions_DirectVent-Pro.pdf

   为您的设备检查手册和将要使用的管道品牌。

   Your double fire stop seems good. I would line the upper one with the roof sheathing.

   I assume the interior wall of the chase is insulated in addition to the outside. You basically have two insulation layers, which is good as these units sink a lot of heat out if the exterior of the chase is not insulated.

   The interior painted wall should be a sufficient vapor barrier. There won’t be a lot of out to in vapor drive here.

6. 
   user-6833011|2019年9月4日下午5:53|#8

   我将检查通风制造商和设备制造商的要求。如果我需要保留1英寸的间隙，那没什么大不了的。

   Why use roof sheathing for the upper layer instead of drywall? Is that to better tolerate incidental moisture?

   The front of the fireplace chase isn't insulated. If I insulate that, where am I drawing the thermal boundary? Wouldn't that encourage the fireplace unit to get cold and radiate cold into the room? I thought the idea was to keep the conditioned portion of the chase warm in the winter by insulating/air sealing the firestop, floor (it's cantilevered), and all exterior walls.

7. 
   Matt F|2019年9月4日下午08:33|#9

   For the fire block location, put the first one lined up with the drywall, second one at the sheathing to line up with the cathedral ceiling insulation. In between install a piece of duct 2” larger than you pipe to enforce clearance and stuff the rest of the cavity with rockwool.

   从舒适的角度来看，我认为您不隔离内墙的想法是有道理的。我认为，除非插入物周围有很多空气泄漏，否则该组件不会对此组件提出任何水分蒸气的疑虑。

   我的房子里有一个我讨厌的插入物。我制作了1.5英寸Polyiso泡沫和硬板的三明治，然后将其装饰。它适合周围。自从我把它放入时，我就没有把它拿出来，因为它很冷。我还没有弄清楚什么，如果碰撞中有任何绝缘材料。上方的墙壁看起来很冷。

1. 
   user-6833011|Sep 05, 2019 02:44pm|#10

   使用管道执行清除是一个好主意。第二层使用胶合板背后的理由是什么？我打算使用几层矿物羊毛在顶部实现R50-R60。不应该像其他任何天花板那样隔热吗？

   我打算花时间在空气密封方面，以尽可能减少空气泄漏。舒适是该项目背后的重要驱动力。我的追逐只在前墙/内壁上有绝缘材料，悬臂追逐的侧面/后壁/地板上没有任何绝缘材料。这使旧的壁炉在热信封外面，使其从舒适的角度看待痛苦/荒谬。

8. 
   Thomas Miller|Dec 21, 2020 04:35am|#11

   Here is one assembling of that style of line. They state clearances are characterized by the apparatus production and air spaces are not to be loaded up with protection.

   https://www.durasystems.com/wp-content/uploads/2019/09/durawall.pdf

   与油漆相反，您应该认真考虑将金属切成薄片，以适合干墙上的火站，然后用高温填缝到整个聚会上。对于消防街区，第一个与石膏板同意，第二个在护套上，以同意教堂的屋顶保护。