Pros and Cons of a Wall-Mounted Bath Fan
谁有安装和评估壁挂式浴风扇的经验？看来他们比天花板上有一些优势，尤其是在明尼苏达州的寒冷气候中，但我没有他们的经验。首先，我喜欢零管道可以减慢气流，允许泄漏到难以到达的阁楼空间中（是的，那些绝缘的塑料 - 旋转式连接和胶带连接的风险有泄漏温暖/潮湿的空气进入我们的寒冷的阁楼），屋顶上的穿透性较小（可以说是房屋上最关键的膜以最大程度地减少孔）。也就是说，壁挂式粉丝的选择较少，还有一些我敢肯定，我不知道有一些弊端。有任何输入吗？
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Wall mount fans that exhaust directly are also the most prone to backdrafting, and they are less effective at evacuating the warm, moist air that will rise to the ceiling.
我总是使用吊扇（超级安静和高效的松下），固定铝制管道，带箔纸与接头，每英尺倾斜1/4英寸，以进行排水。我从不穿过屋顶，从未驶入绝缘天花板。我建造了一个。在气密的热包膜边界下方掉落拱腹或子天花板，用于风扇和管道安装。而且，由于我的墙壁是双框的，而且厚度为12英寸，所以我垂直掉下3'的管道，然后退出侧壁以最大程度地减少背后（反向反向）冷空气的热浪。有了单个墙壁，垂直腿可以沿着墙壁的追逐内部，可以巧妙地掩饰为搁架单元的侧面或隐藏在亚麻壁橱中。
Robert, thanks for the thoughtful reply. Cool idea on the vertical drop of venting. I'll no doubt be trying this method in the near future. My current client just won't go for a dropped ceiling or soffit. Very important for them to know about the downsides that you mentioned though. Can your refer me to any written resources that you used to determine the backdrafting issue? Or is the backdrafting issue known primarily from word-of-mouth? On this current retrofit (2x4 walls), we have specified a Panasonic ultraquiet wall fan (I like how Panasonic fan housings have so few holes!). It does have a backdraft damper in the integral exhaust hood but maybe they don't work as well as the dampers in the stand-alone exhaust hoods? These clients are scientists by training so written info is very powerful in getting them to consider better options. Thanks again and hope you are getting as early and warm of a Spring as we are. Bob
Sorry, but I can offer no documentation. This is the way I've built for 20 of the 30 years I've been involved with super-insulated construction. It's simple physics, so these scientists should be able to appreciate it. A short, direct link to the outdoors is going to be a heat loss path if not an infiltration source.
Robert,
I have installed wall-mounted bath fans that worked fine and did not result in complaints about backdrafting. Panasonic is the best brand. Mount it close to the ceiling.
Another thing to keep in mind, the Panasonic wall mount fans are noisier than their ceiling mount fans for some reason. It's another reason to try and make the ceiling mount work, if you can. The ceiling mounts can go as low as 0.3 sones, but the wall mount puts out 1.1 sones, which is quite a bit louder.
杰西·汤普森
Kaplan Thompson Architects
I realize that a quiet fan is usually thought to be more desireable.
Sometimes a lttle noise can be a good thing.
有点意识到风扇正在运行.....
并沿着“礼貌的冲洗”的想法;-)
A "courtesy flush" is for jail cells. In homes, people tend not to use fans that are noisy.
Not only do ceiling fans perform better in every way than a wall fan, but they can be incorporated with the area lighting (and Panasonic units also include a night light).
Old house question:
如果很难将风扇进入天花板（外墙在天花板高度以下6英寸的屋檐拱腹，无法触摸金属屋顶，并且在我当前的一个项目中不能降低天花板）像Tamarack这样的背景阻尼器在壁挂式安装座上有帮助吗？您还会去找吊扇吗？
I have both wall & ceiling Panasonic fans, each works well. I less fond of the wall fan because I can hear the damper flap when the air pressure changes, when the fan isn't running. I can also see light through the short length of duct, when I turn it on and the damper opens.