Dryer venting
I am building a new home. The laundry room is in the middle of the house, second floor. To vent the dryer I will have to run a pipe approximately 20 feet. I plan to use PVC non-pressure rated pipe.
我的问题：1）我如何知道在头部损失前的管道的长度限制不允许烘干机发泄，2）如果我必须将PVC管道从4英寸减少到三英寸的pvc管道。2 x 4，这会成为问题吗？
GBA Detail Library
A collection of one thousand construction details organized by climate and house part
Search and download construction details
Replies
干衣机将带有指示指示您可以运行多少英尺的管道以及如何考虑肘部的说明。您不应将管道的直径降低。您可以用1x2的2x4墙弄平2x4墙，并将管道保持在4英寸？我总是在机器后面的墙壁上安装一个干衣盒，以便柔性管长度尽可能接近零，请检查dryerbox.com
Chris,
PVC管的使用发泄烘干机是一个code violation. The International Residential Code requires metal duct. Here is what the IRC says in section M1502.5: "Duct construction. [Dryer] Exhaust ducts shall be constructed of minimum 0.016-inch-thick (0.4 mm) rigid metal ducts, having smooth interior surfaces with joints running in the direction of air flow. Exhaust ducts shall not be connected with sheet-metal screws or fastening means which extend into the duct."
For more information:
http://www.ehow.com/about_5422684_types-pipe-used-dryer-vents.html
Chris, why not a condensing dryer like the Bosch Axxis? It doesn't require venting at all.
它不是那里最便宜的干衣机，但可能比长时间复杂的管道运行的总成本要便宜，这可能会导致以后会导致问题吗？
感谢你们三个人的建议！我知道PVC已经出去了，谢谢Martin！我将调查其余的
I have the Bosch Axxis and love it. Especially when it's -40C outside and I'm not blowing out all my nice warm air. It's really too bad these things are so hard to come by in North America.. They're great.
Many dryers have a maximum length limit of 25 feet for vent pipe. Each 90 degree elbow is equivalent to 5'. I have not looked in to it but I was told some new dryers can have longer runs, again I do not know if that is true..
I see a lot of poorly installed and designed dryer runs. They end up causing a lot of clogs. Use as few elbows as possible. If you are running the pipe trough an unconditioned space be sure it is insulated. A long run through an attic will cause condensation in the pipe which speeds up the accumulation of lint.
Unfortunately there is no standard on where the vent exits the dryer. They can be left, center or right. and now we have dryers that sit on pedestals. In your design allow enough room behind the dryer to allow for a good connection. I see pipes that are nearly impossible to make a connection to. I see people that take an 8' section of vinyl duct snaked and kinked behind the dryer because it can be so had to connect.
Dryers are on of the leading causes of house fires. Clogged and improperly vented and clogged vents are a large part of this. Clogged vents cause dryers to run excessively resulting in wear to the equipment and clothes and higher utility costs. It is worth it to do it right.