B
Billybobbong
- 33
- 8
I allways use a prefilter of some kind, even used a filter mat just pulled over the duct to stop stuff entering the filter, when I push into them it's allways protected to ensure the longest running time out of them. So in mine the inner filters prefilter is protecting both inner cores, just make sure it's covered correctly sometimes I tape the ends down with a ring if duct tape.I have had the same 2x4 tent and equipment for the last 4 years. I have kept the fan and filter inside the tent, sacrificing that space.
When the filter is inside the tent, air enters the filter through the cotton cover and exits the filter inside on its way to the duct and fan. After each grow the cotton filter cover is dark with resin particles and needs to be cleaned.
If I move the fan/filter outside the tent then the air would be moving through the filter in reverse, from the tent through the duct to the inside of the filter to the outside, bypassing the cotton cover.
In my mind I imagine the carbon inside the filter getting dirty faster without the cotton to act as a first stage filter. Also, the surface area of carbon exposed to dust and resin particles is less on the inside circle of the filter then the outside circle.
Is there a difference in carbon filter life expectancy based on position inside or outside of the tent? How about the fan, if the fan is positioned before the filter, does it get gummed up faster?