Hello all, I'm sure this will be the first post of many from me This is my 2nd grow (the first was a half arsed attempt before I found uk420 ) and I'm almost finished building my new room but have a couple of worries that are niggling away at me.

I've got a S & P TD250 which is outside my box, pulling air through a home made filter (Elzarr and Nigfis' design with approx 1inch depth of carbon in it). My box is 2m x 1.5m x 1.5m and there's 1m of ducting from the filter to the fan then about 2 metres of outlet ducting which goes out through the roof. I've heard S & P fans shouldn't be used with carbon filters and I'm worried that either the fan is going to pack up half way through flowering or the filter isn't going to be matched to the extraction (250m3 per hour). I've tested it with essential oils and there's no smell unless I turn off all extraction. Should I dump the TD250 and just go for a ruck100 with matching carbon filter or will my current setup be ok? Has anyone else had any experience using S & P TD fans with carbon filters?? Could I get away with using a CF160 with my current fan?

Sorry about length of post, too much coffee at work and can't wait to get home for a bifter.

Thanks

I'm currently using a TD160 with one of the small shop-bought carbon filters without any problems (and the fan is running on its slowest speed). I'll be interested to hear if anyone predicts problems using the S&P fans, however; this is my first grow and I'd rather it didn't stink when I hit flowering! But its hard to see at first glance why S&P fans should break down when attempting to draw air through a filter: they're designed to suck a certain amount of air in a certain amount of time, so why should they collapse when pulling through a filter?

S&P fans are well made, and work well - they may not last as long as one of the more expensive metal cased ones, but have other virtues - they're very quiet, and quite compact, and would appear to have a 5 year guarantee! (if they live up to what it says on the box........)

Cheers , I think I'll stick with my TD250 and use a controller to slow it down a bit then stick a CF160 on the end, my space is limited and I can't fit a CF240 in my box :/