High Humidity Despite Whole-House Dehumidifier
Hello.
几个月前，我们完成了建造房屋。我们决定在游戏中后期将ERV添加到每个炉子上。结果，它与现有的管道工作有关（我知道这不是理想的选择，但我们不想撕开墙壁）。在为二楼服务的系统上，我们添加了整个房屋除湿机。在地下室，我们有两个自由的大型除湿机。
在非常炎热的潮湿的日子里，楼上的湿度明显高于一楼。由于我们将整个房子的除湿机上楼上都有，因此湿度水平应低得多。目前楼上的湿度已经准备好
接近70％。太高了！在没有整个房屋除湿机的一楼，为50％。
The HVAC contractor has come out and tells me everything is working correctly and is set up right. But it’s not. The humidity upstairs should never be this high.
关于问题有什么想法？故障除湿机？还要别的吗？
GBA Detail Library
A collection of one thousand construction details organized by climate and house part
Search and download construction details
答复
Is your dehumidifier only running when the furnace is running?
Hard to tell without a duct diagram.
There are lots of things that could be wrong, but one thing that could be part of it is that during the summer, the "reverse stack effect" means that cold air inside the house sinks and flows out of leaks near the bottom, and replacement air is sucked in through leaks in the envelope at the top. For example, if you have a vented attic and recessed lights in the ceilings upstairs, those often leak hot, humid outside air from the attic into the house. Attic hatches are another common leaks but there can be lots more.
您有鼓风机的门测试吗？您的阁楼是条件或排气到户外吗？
It could be that it's working as designed, which is what the HVAC contractor is checking, but that the design is flawed.
Tell use more about what is going on. Do you have a temp/humidity gauge inside and out? You can get one like this for ten bucks on Amazon:https://www.amazon.com/gp/product/b01h1r0k68
Telling us the humidity is "too high" doesn't really help us.
Also, what is the outdoor humidity and temperature?
Does the whole house dehumidifier have its own fan, or does it only run when the HVAC fan is running? Does it have a humidistat setting, and what is is?
With the ERV, whole-house dehumidifier and HVAC system all using the same ducts, there are all sorts of possibilities for crosstalk and unexpected air flows. Even with its own fan, a dehumidifier that is cut into the main ducts can just recycle its own air through the ducts without ever treating the room air. There are many other possibilities. It would take careful observation of the system in operation to catch them all. You will probably need someone local who is not related to your HVAC contractor to figure this one out. Your location, a duct diagram and equipment identification might help us to give you some more specific advice.
Start with the simple stuff first.
1. Get duplicate humidity sensors. Everywhere you are monitoring humidity should have two sensors. Does not matter if one is unconnected and inexpensive - you just want to be sure you humidity sensor is not wildly off.
2. On the upstairs HVAC system, do you have the option of running the fan constantly? If so, try that for a day or two. That will help cycle the air through the upstairs space.
3.您是否检查了除湿机以确保其实际运行？确认后，尝试将其调整。如果是拨号，每次都要多一点。看看这是否对湿度有任何影响。
4. Do you have a humidity monitor in your attic? Is the attic vented or conditioned?
还要注意，如果您最近搬进来，并且最近打开了HVAC，则建筑材料中会有大量水分在头几个月内消失。调整天气/外部湿度/温度时，您的整体阅读趋势是否会下降？
Is the temperature way lower upstairs?
加湿器infiltra开车吗tion? Either by drawing in OA directly (some dehumidifiers have a outdoor air inlet), or by causing the furnace fan to run and lose/gain air in the leaky attic ductwork?
请记住，R在RH中是相对的。
使用此计算比较露点
http://www.dpcalc.org/