答复

1. 
   Davidmeiland|2012年3月22日晚上11:32|＃1

   I agree that 30CFM is minimal for a bathroom, at least one with a shower that's used daily by a family. I'd prefer to have 80CFM or more so that surges in humidity can be knocked down quickly.

   但是，听起来您没有长时间使用这种设置，所以...花几个星期的时间来看看它是如何工作的？目的是提供足够的新鲜空气（不过度通风），并足够迅速地从房屋中清除水分和污染物，同时从废气中恢复尽可能多的热量。整个事情取决于很多乘员及其习惯。房子里有多少人？

   为了确定它是否有效，您可能需要监视内部湿度，最好使用精确的仪器。在2.5ACH50时，您很可能至少需要在某些时间运行机械通风。您在哪个气候区？

2. 
   3wr4t8mful|Mar 22, 2012 11:44pm|＃2

   We are in Zone 5 (Chicago). Prior to the installation of the spray foam in attic and HRV installation, we had a 75cfm fan in the large bathroom that was inadequate -- even after 1 hour of running on a timer, the bathroom was very humid. For the 1755cf/7.5=234 -> That's what I roughly calculated for 8 air exchanges per hour. Within the bathroom - steam shower, toilet, 2 sinks, jet tub. I don't know if the 234cfm calculation however is valid with an HRV in place. We've unfortunately found that 30cfm for the 792 cubic foot bathroom to be inadequate, so I'm guessing its going to be terrible for the bigger bath. I'm just wondering what the options are at this point. It's not like I can make the HRV pull any more air -- 30cfm is at the max setting. Do I unhook the HRV from the intake fan and make a separate intake away from the main fan? Do I simply out another fan that vents to the outdoor somewhere else in the room?

3. GBA编辑
   马丁·霍拉迪（Martin Holladay）|2012年3月23日上午06:04|＃3

   凯文，
   You wrote, "The HRV is installed in the attic with intakes from two of the bathroom fans." Does that mean that your HRV installer didn't remove the obsolete fans? That doesn't make any sense. You need a ceiling grille, not a bathroom exhaust fan, if you have replaced your eshaust fan with an HRV system.

   大多数HRV都具有控制较低的连续浴室通风以及由浴室手动覆盖开关控制的高速增强模式的控制。您确定您的房屋中安装的型号无法使用该功能吗？

   如果你的HRV有限控制,没有high-speed boost, you may have to have two types of exhaust ventilation in your bathroom. If, after living with the system for a few weeks, you conclude that this is the case, you would need to disconnect the HRV duct from the existing exhaust fan and reconnect the existing exhaust fan to the old exhaust duct. Then install a new ceiling grille for the HRV.

   有关通风率的更多信息，请参见设计良好的通风系统。

4. 
   3wr4t8mful|2012年3月23日上午08:17|＃4

   很抱歉，如果我没有充分解释情况。

   Yes the ceiling fans were removed. The grills and locations from the fans were used to place he inlet to the HRV.

   The HRV has a low level continuous mode. The flows when measured were anywhere between 18-22 CFM.

   The HRV does have a manual over-ride switch located in two bathrooms that has a high speed boost. When activated, the flows were measured at between 30-35 CFM. Despite this high flow rate, the humidity in the bathroom one hour after running the shower for 10 minutes still seems excessively high. I don't have any measurements of the actual humidity levels -- just my sense of feel,.

   我想我的问题在上面得到了回答。如果HRV通风不足，请删除HRV摄入量，重新安装粉丝，并使用新的天花板格栅在其中制作新位置。

   流速的准则，看起来像是一个混合的袋子。浴室的能源明星/ASHRAE建议为20+ CFM。如果将流量衡量为当前范围内，但它们“感觉不足”，我会得出结论。

5. 
   Davidmeiland|2012年3月23日上午09:58|＃5

   您对以前的巴斯风扇的评论令人困惑。如果房间为1775立方英尺，则在200平方英尺的范围内……大但不是pal。我希望在一个小时的跑步中，一个75CFM的粉丝会在其中做出凹痕。

6. 
   3wr4t8mful|2012年3月24日上午09:37|＃6

   You are correct -- the bathroom is over 200 square feet -- Its definitely not palatial. It contains a steam shower, two sinks, and jet tub. Maybe I'm being overly optimistic, however after running just the shower for just 10 min (no steam setting) and turning the 75 cfm fan on for 1 hour via the timer switch, it will take about 4-5 hours before the room feels without any humidity. Is this normal or do I just have just have too high of expectations?

7. 
   Davidmeiland|Mar 24, 2012 11:42am|＃7

   淋浴关闭后，雾从玻璃中清除需要多长时间？我知道您对湿度的明显意思是什么，但是选择便宜/不错的湿度计呢？像这样的东西，尽管我也喜欢拥有一个遥控传感器http://www.energycircle.com/shop/aube-thermohygro-thermmeter.html

   我猜想蒸汽淋浴会淹没当前的通风。