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How does the Rain Cap B for the duct pipe work?
These rain caps are basically a smaller pipe within a larger pipe that is mounted higher in the air around the outside of the smaller pipe.
The idea behind how this works is that rain never falls straight down and it will hit the outside, exterior pipe and run down the side walls.
This keeps the rain from entering the smaller inner pipe where the air is being exhausted from the building.
This design allows for zero pressure loss.
Title: How does the Rain Cap B for the duct pipe work?
Description: Explanation on how rain is kept from getting into the cap
Last Edited: 9/18/2013
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