将通风口添加到没有拱腹的房屋中
Folks,
我可以使用一些建议将通风口添加到我的房屋中，该通风口在顶部的顶部有一个平坦或几乎平坦的屋顶，没有拱形。我有第二座帝国维多利亚时代的房子，上面有马萨诸塞州西部的曼萨德屋顶。顶部的屋顶是一个60万TPO完全粘附的屋顶，将其放在改良的沥青屋顶上的1英寸聚异透明酸盐绝缘层上。当我们安装这个屋顶时，我消除了一些通风孔，这可能是一个错误。
I now plan to add insulation to the attic but am told I need vents in the roof. One roofer suggested two Lomanco Whirlybirds but also said it might not work because there were no lower intake vents. A Lomanco engineer recommended against his own vent because there are no lower vents and suggested a gravity vent made by Greenheck. But a Greenheck technical sales rep recommended against installing a gravity vents because I would be
期望空气流入并自愿流出。
您可以从这两张图片中看到，没有拱腹的地方，屋顶基本上是平坦的。
So what kind of vents should I install?
答复
维多利亚豪斯, you won't hear me saying this very often because I avoid foam whenever possible due to climate and health concerns, but this is a situation where closed cell foam is likely the best way to ensure your structure remains safe from moisture issues. I specify HFO-blown foam, which has a blowing agent that is not as terrible a greenhouse gas as conventional HFC-blown foam. If your installer doesn't know what HFO-blown foam is, find a different installer.
Thanks for responding to my post and questions Michael. A couple vent manufactures recommended I go with gravity vents. One has recommended two intake vents at low points at both ends of the roof, and two exhaust events at the highest point on the roof. Active Ventilation Products Inc is recommending:
>排气
https://frofvents.com/?s=Av-16-c12&post_type=product
>PV-16-C8 or C12 for intake.
https://roofvents.com/?s=PV-16-C12&post_type=product
Does this make sense to you?
Love that house!!!
我不是专家，但是我一直在研究我的100岁小屋的一些选择。
如果您确实想查看添加拱腹通风口，我发现的两件事是：
1.排气的滴水边缘
2.进气通风口的木瓦
查找它们，看看其中的任何一个是否都适合您的美丽！
Thanks for your response Lindaloowho,
我认为，用新的通风滴边缘定制的当前滴水边缘将非常昂贵，并且不是一个选择。但是也许排气的冠状成型可能是值得研究的。鉴于带状疱疹是三楼的外墙，因此进气口的木瓦也无法正常工作。我希望重力通风孔能够工作，现在我正在等待专家称重并告诉我这些是否有效...
:)
With living space under a roof like yours, any type of spinning vents, powered or not, are a bad idea. It is very easy for these to depressurize the attic space and exacerbate moisture problems by drawing in more moist air from the house through leaks in the ceiling/walls.
坚持简单的通风开口。
Around me (Zone 5) lot of low slope roofs are vented with a combination of edge vents (just a gap behind the drip edge) and the occasional flat roof vent.
如果您可以安装排气的皇冠，并且后面有足够的开口来喂阁楼，那可能是您最好的选择。您还可以在区域中剥离顶部两排的带状疱疹，切开阁楼空间顶部附近的一个开口，然后在通风口上安装木瓦。这可能会更便宜，因为屋顶工可以完成，并且不需要木匠。
我们的代码需要低坡度屋顶与俯仰屋顶的通风孔区域约2倍，因此请确保相应地尺寸。
Some exhaust vents near the top of the ridge might also be needed. You can try just installing the edge vents first and install these if you see issues.
Thanks for weighing in Akos,
我正在考虑的排气口不要旋转。Active通风产品公司说：“风在头部周围旋转，使其在其下方的空气中拔出。”
这是否有意义并对您的思想产生任何影响？
我将研究排气的皇冠造型，然后剥离前两排的带状疱疹。但这似乎非常昂贵。
What if I had gravity vents like Greenheck’s GRSI
https://www.greenheck.com/products/air-control/gravity-ventilators/intake-gravity-ventilators并将它们放在顶部屋顶的最低点和顶部屋顶的最高位置？那会起作用吗？这是Greenheck Gravity通风口的外观。这里没有任何旋转。
我对您的热边界目前的位置感到好奇。您在膜下提到Polyiso，这似乎是一种浪费，因为它不会在通风的阁楼上做太多。您是否有阁楼空间，地板上有绝缘层？
There is insulation over the ceiling of the 3rd floor. Our plan is to add additional insulation in the attic. There is a trap door on the ceiling of the 3rd floor, leading to a hatch to the roof. These photos are of the space between the roof and 3rd floor attic. And yes, the insulation under the TPO is a bit of a waste with respect to insulation. I can't remember why we added that. It's possible the roofer thought it would be a good surface upon which to lay down the Firestone TPO.
Those vents are for commercial application where there is fan pushing air out, closer to a range hood cap than a roof vent. You want simple passive vents, essentially a big hole protected from rain.
Depending on how your crown is installed and finished, you might be able to drill holes in it and protect with color matched covers. In your case it is also much easier to add vent area to the peak of the roof, our code allows only 25% of the total vent area to be down low, which would reduce your install costs a fair bit.
感谢您的评论，Akos，
What if I had two whirlybird style turbine vents at the highest points on the roof, and then two gravity vents like Greenheck’s GRSI to allow the air to flow in on the lowest points of the roof?. Would that work?
You can power vent an attic, routing ducts wherever convenient. For moisture control (vs attic cooling), very little CFM is needed. So it will use little electricity. The common concern about depressurizing a) isn't significant at very low flow rates or b) can be avoided completely with push/pull ventilation.
感谢您的评论乔恩·R。
房子没有管道。房子用热水加热。你能解释一下你的意思吗？您是说我应该在屋顶的顶部有一个排气扇，并且在屋顶的最低部分上也安装了进气口？