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In this video, Robert shows you how to clear a clog out of one of our direct fired heaters, the S405 400,000 BTU. This unit is similar to our other 400,000 BTU heaters, but with a few key differences.
The S405 is especially useful in dusty environments, such as construction sites.
![](https://s2.save4k.ru/pic/uSZQR-_MPGU/maxresdefault.jpg)