- Joined
- Jun 14, 2021
- Messages
- 76
Hi folks, I currently have a ductless fume hood with carbon filters and was advised that this was not good enough to filter out nox gases and that I should use ducting and a scrubber, I have had a look at several scrubber designs including 4metals designs and they are a bit complicated for me plus I dont have access to water in my shed unless I run a really long hose in which is not very practical so I have come up with an inline three stage scrubber idea to attach to my plastic ducting,, I am going to reactivate the carbon in my fume hood filters by placing the carbon in a kiln at 800° then add a 12" duct flange over the fume hood exhaust for the 12" ducting, the first filter will be bioballs washed in a solution of sodium bicarbonate and placed inside the first filter, this will be a removable filter so I can replace the media, the next filter will be prilled limestone granules, which will be removable as well these granules go a purple colour when they are used up so being able to remove the filter and replace with fresh granules is a must and the final filter will be another carbon filter just to be sure I have drawn a diagram showing what it will look like but dont know how to post it, I would love to hear everybodys opinion on my idea, especially 4 metals, am I on the right track? or is it a case of back to the drawing board, many thanks for any advice