I have a new tight home and am advised to run my bathroom fan 4 to 6 hours a day
…促进健康的空气变化并消除水分。但是，我的内部湿度为32％，我觉得我们需要更多的舒适。是否通过消除水分来运行浴室风扇适得其反？我们如何确定“空气不良”？如果我们不在规定的时间运行风扇，我们不会注意到任何难以呼吸，拥堵等。是否足以连续运行强迫热空气风扇以从淋浴等中散发湿度等，而不是用尽空气？
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Replies
迪克,
您需要提供更多信息。
1. Your interior humidity is 32%. Do you think that is too high or too low? Why?
2. You write that you need to be "more comfortable." In what ways are you now uncomfortable?
3.我很高兴您没有呼吸困难，也不会遭受交通拥堵。也许一切都很好。
4. Don't run the furnace fan continuously for circulation. The fan provides no useful benefits but uses a tremendous amount of energy. Some furnace fans draw 700 or 800 watts.
The recommended indoor humidity is 39% which reduces nighttime dryness and resulting colds etc. What detrimental effects would ensue from not mechanically ventilating a tight home? My furnace fan is a variable speed which my HVAC provider tells me would only cost a couple of dollars a year to run continuously. My thought is to circulate humid air from the bathroom throughout the house.
迪克,
关于室内湿度的偏好，存在很大的可变性。如果您想尝试在按钮上达到39％的命中率，请继续前进 - 尽管很难击中任何数字，因为天气一直在变化。
我认为陪审团仍在谈论“夜间干燥”是否引起感冒。我将讨论留给您和您的医生。
Do you suffer from frequent illness? If not, relax.
Most furnace fans are off more than they are on. I'm guessing that the typical furnace fan runs for only 4 to 6 hours per day on a year-round average, but this number will vary from house to house. If you run your furnace fan for an additional 18 hours per day, just to circulate the air in your house, and if your electricity costs $0.12 per kWh, then running the fan will cost you:
A.对于200瓦鼓风机：每年$ 157.68。
B.对于400瓦鼓风机：每年$ 315.36。
C.对于800瓦鼓风机：每年$ 630.72。
迪克,
我很惊讶你的狭窄家很干。
你住在哪里，你的房子有多紧？
他们做了鼓风机的门测试吗？
I'm in Ma. and blower test measured leakage to outside 30CFM Duct leakage 30 CFM25, Infiltration Htg: 599 Cig: 599 CFM50. HERS index. 59. Still looking for an answere to my main questain.
迪克,
I think we've been trying to help. So tell me — what's your main question that you feel has not yet been answered?
迪克,
Your main question is interesting.
did they calibrate/measure your exhaust system?to arrive at the run time?
我认为他在问他是否应该逐渐降低通风
迪克,
尽管我建议建筑商提供符合ASHRAE 62.2要求的机械通风系统，但由房主决定如何操作设备。您可以通风很多或通风一点 - 取决于您。
As long as your windows aren't dripping with condensation, you probably aren't damaging your house.
我主要关心的是，是否不会因不采用措施而产生任何有害健康的影响。还是仅可能损坏房屋？我认为窗户上的凝结是一个很好的措施。
迪克,
正如我之前建议的，最好就医疗问题咨询您的医生或医疗论坛。在GBA，我们是建筑商，建筑师和能源专家。我们不是医疗专业人员。
I'm sure plenty of the regulars here are eager to chime in with advice on whether high humidity or low humidity is best for your lungs. Take it all with a big grain of salt. Let me put it this way: humans have evolved to live healthy lives in deserts as well as very humid jungles. Human lungs work fine in both environments.
Your house; your lungs. Run it how you want.
迪克,
我仍然认为您应该质疑您的承包商有关实际测量流量的问题。
我必须坚持认为他们返回并测量我的新鲜空气流...否则他们只是在猜测，您可能会超越代码（或以下代码）。
使用浴室用尽空气的一种方法是使用可编程的时间开关。
市场上有几个。Tamarack Advantage 1a是唯一允许您速度速度风扇的人。您可以在tamtech.com上找到它们
Martin, This is not a medical question. I merely wanted to know if the ventilation requirement was to protect the individuals or the house, after doing some additional research elsewhere I have concluded that it may affect either. Thanks for trying. Thanks to John for the info and Tom I do have a programmable timer on my fan.
迪克,
代码通风要求是保护房屋和乘员。冬季，古老的漏水房屋通常太干，但是新的尺寸适中的新狭窄房屋通常太潮湿了。
Excess humidity can cause:
1) window condensation and consequent staining of wood trim
2）热包膜内的凝结，然后导致霉菌和腐烂
3) damage to electronic equipment
4）增加尘螨和昆虫感染的潜力
5）增加了制成品木材产品中粘结剂的甲醛的排气增加
一座新房子从建筑材料（尤其是木材和混凝土）中的数百加仑水分开始。典型的家庭每天从正常活动中引入4-5加仑的内部环境。没有足够的通风，包括在浴室和厨房范围内进行的斑点通风，每天的湿度增加了房屋干燥造成的水分，并可能建立危险水平。
过多的通风不仅浪费了能量，既可以运行风扇的电力和加热替换空气的燃料，而且还可以过度穿过条件空间，尤其是在一座大型房屋中，其体积倾向于稀释每日人为的湿度。
湿度不足可能导致：
1）收缩和损坏木地板和家具
2) respiratory problems
3）皮肤和喉咙刺激
在寒冷的气候下，房屋更喜欢相对湿度在20％至40％之间。人类更喜欢30％至70％的湿度。因此，最好的折衷是将室内相对湿度保持30％至40％。众所周知，一些廉价的湿度计是不准确的。确保您拥有高质量的数字湿度计，可以跟踪低点和高点。
But whole house ventilation is not simply for controlling humidity (though that's often a good indicator of overall indoor air quality). Most new homes also have formaldehyde (from carpeting, furniture, cabinets and building materials) which is a trigger for generalized chemical sensitivity, and carcinogenic radon gas is common in all parts of the country (particularly the northeast).
There are 17,000 petrochemicals available for home use, only 30% of which have been tested for safety. The typical American household has 63 synthetic chemicals, and the bloodstream of the average American contains 145 chemicals.
房屋中常见的化学物质包括：
- 持续的生物蓄积毒素（PVC，CPVC，CSPE）
- Persistent Organic Pollutants (PBDE, HBCD, PFOA)
——Volatile Organic Compounds (formaldehydes, phthalates)
- 重金属（汞，铅，镉）
- 可吸入的颗粒（玻璃纤维，木烟）
- Combustion Byproducts (C02, CO, aldehydes, phenols, benzoprene, cresols)
因此，有很多充分的理由可以维持ASHRAE批准的通风水平，无论有没有热恢复，每100平方英尺的条件面积1 CFM加上每卧室7.5 cfm（加上一间）。如果您觉得这过于干燥您的房屋以保持舒适和健康，则可以使用加湿器或更多盆栽植物。