专注通风管道加工·排烟罩

　　In the first few years of our existing house, I struggled in various ways to vent the bathroom shower upstairs. Everything I tried led to condensation and ice problems. Even with double R-19 cotton floss over galvanized ventilation ducts, I still encounter problems of condensation and freezing. Are there any proven solutions to this problem of cold weather condensation when we are preparing to build a new house? It's a good question, because it's not something I often see doing well. Before we get some specific suggestions about pipeline installation in cold weather, let's start with some basic pipeline suggestions.

　　建议我们的客户尽可能地将他们的浴室风扇从山墙墙上吹出。如果您通过屋顶排气，冷凝水会滴回到内部。如果您通过拱顶通风，通常位于阁楼通风口，水分将被吸回到阁楼或屋顶通风口。使用刚性金属管道（铝或镀锌钢），纵向接缝朝上，接头用铝箔胶带或管道胶泥或刚性塑料管密封。务必使管道倾斜一点，以便排出外部。刚性管道优于柔性管道，较大的管道是优选的，特别是如果运行较长。佳做法是将整个镀锌通风管道用R-3包裹到R-8绝缘层，但是，如果没有别的，你应该少将6英尺的管道包裹在终点内，这是有可能发生冷凝的地方。保持通风口低，并在管道上运行绝缘层。

　　It is recommended that our customers blow out their bathroom fans from the wall as much as possible. If you exhaust through the roof, the condensate will drip back inside. If you ventilate through the vault, which is usually located in the attic vent, moisture will be sucked back into the attic or roof vent. Use rigid metal pipes (aluminium or galvanized steel) with longitudinal joints facing upward, and the joints are sealed with aluminium foil tape or pipe cement or rigid plastic pipes. Be sure to tilt the pipe a little so that it can be discharged from the outside. Rigid pipes are superior to flexible ones. Larger ones are preferred, especially if they run longer. Best practice is to wrap the entire galvanized ventilation duct in R-3 to R-8 insulation, but if nothing else, you should wrap at least 6 feet of duct in the end, which is the most likely place for condensation. Keep the vent low and run the insulation layer on the pipeline.

　　对于外部通风口结冰的问题，相对湿度为25％（相当低）的70°F室内空气将在33°F冷凝，因此在寒冷天气会发生冷凝。用风扇推110立方米。每分钟英尺，空气温度为80°F，相对湿度为80％，正如您在使用漂亮的蒸汽淋浴时所做的那样，在10分钟的淋浴时，当它在外面25°时，你会产生几乎3/4杯的冷凝水。

　　For the freezing problem of the external vent, the 70 degree F indoor air with 25% relative humidity (quite low) will condense at 33 degree F, so condensation will occur in cold weather. Push 110 cubic meters with a fan. At a foot per minute, the air temperature is 80 degrees F and the relative humidity is 80%. As you do with a beautiful steam shower, in a 10-minute shower, when it's 25 degrees outside, you produce almost three-quarters of the condensed water.