Seal the small cupboards airtight

[BaronS]

I'm blowin more than I'm suckin and have been doing a bit of that wor-w-wor-wor, oh you know, stuff and some extra bucks should be headin my way shortly, so I thought I'd ask a question.

 

Flowering: 860*560*1600mm

Vegetative: 860*560*1000mm

 

2 old wooden cupboards stand side by side and as of a few days ago an IXL 55L/s fan is suckin air into a (no fan) 150mm duct at the top of the flo box into the bottom. More duct then connects the two boxes, including a light trap made with an S bend and some cardboard, coming out the top of flo and feeding into the bottom of the veg area. Exhaust from the top of veg hits the fan and is blown outside.

 

6M of duct in total. Fan runs 24*7.

500 odd watts of CFL spread between the 2 but I am going to get another 100W into the not yet full flo box. Final figures should be 500 flo and maybe I'll bump veg to 200.

If the CFL's don't work out maybe a 250MH for veg and 400HPS for flower, maybe, and not this trip.

 

The veg area is pretty well lightproof. Cheap GAF lines the doors and there's a couple of cracks and though I don't consider absolute light seal necessary for veg the main point here is that it leaks air like a sieve.

The flo box is better sealed, both light and air. Still, there's a bit of air leakage (eg. the floor of the cab is 100mm above floor level, light can't get in so I didn't pay a lot of attention to it).

 

All this in order to say that less air gets sucked in than blows out.

With all lights on the air coming out is still significantly warm and my temps inside are a few degrees above ambient, flo being a bit higher at times than veg.

 

I probably can seal the lot up tight. Silicon the corners and another coat or two of paint. Other idea is a 2nd fan pushing the inlet or maybe between the 2 boxes.

 

Is this right? 2 55L/s inline fans will still only pump 55L/s but will do so with more 'push' in this arrangement? It would also even up my flow, I expect, and should do away with 'negative pressure' in both areas. Inline's are also not recommended for use with carbon filters but would this arrangement have enough push to handle such?

 

or would I be better off putting the existing fan as inlet push and get a centrifugal to push some theoretical, but likely, filter?

[spartan]

All this in order to say that less air gets sucked in than blows out.

 

I don't think that is possible.

[BaronS]

how about more air gets blown out than goes in the inlet? and due to leakage in veg less is sucked out of flo.

 

I sortta thought people would get the idea, but valid comment.

[nitram]

HI BS,

 

BS .....I'm blowin more than I'm suckin and have been doing a bit of that wor-w-wor-wor, oh you know, stuff and some extra bucks should be headin my way shortly, so I thought I'd ask a question.

 

U crack me up BS with all your huffing. blowing. and pulling

 

"Negative pressure" - I'll keep it simple. Suck more air out than come in through your inlet.

 

less of that wor-w-wor-wor and more work work work

Nitty.

[BaronS]

OK, so now I'm a blowhard. :-)

 

Is it better that I seal, at least, the veg cabinet so that all air my exhaust fan can pull out is also pulled out of the flowering box? This seems not a difficult thing but not exactly an easy exercise with a cupboard full of dope.

 

It's a shitload easier for me to add a push fan on the inlet. The question about 'do I still get 55L/s' is mostly about humidity. If my recent bout of trouble is spider mites low humidity can be a contributing factor, pushing air through faster during Sydney's summer is likely to dry me out faster.

 

Most of the huffin and puffin is, if a bad attempt at humour, trying to describe what the problem is.

 

I'm OK.

You're OK.

[bufo marinus]

Honestly Baron, low humidity isn't a drama, yes there is 'optimum' humidity but it's not a major problem with growing.

Ditch the cfl's, keep them for veg

Buy a 150 Centrifugal

Buy a carbon filter

Buy a 400 HPS

Put it all together, stand back, and watch it perform, it'll pay for itself first grow that's my opinion

[BaronS]

someone in chat questioned my use of 170mm fan with 150mm duct, thought I'd thrown the box but I was moving some stuff and realised I'd put it aside (good strong boxes are always handy).

 

Note the top and bottom points on the left. (with apologies for fuzziness, box didn't sit well on the scanner)

You can also see on the right side how the fan housing is flanged to accomodate 150mm duct, and 170mm fan.

 

Basically, the kit came that way.

[bufo marinus]

That inline fan won't have enough grunt to 'push' air through a carbon filter, but it may have enough to suck through. That's the best way to make use of a filter.

As for evening up the air flow ummmm geeeeez of course better sealing of the room will drag more fresh air through where it's meant to go

I guess you have to weigh up if you want to spend the money and buy a Centrifugal 150 and Carbon Filter and be done with it or another inline one and fuck around fitting a carbon filter to it and another round of idiotic questions.

 

Why do you think those inline fans aren't rated very highly? Why would you want to consider having a fan burn out and burn your fuckin house down when you could just buy the right thing first time? Why do you do this Baron? Why do you PERSIST in re-inventing a lop-sided wheel? Don't you noobs understand anything? Why the fuck must you have someone else spoon feed you all this and then stand there and argue? Fuckin hell man, some of these threads are getting fucking painful.

If your gonna do something, just do it. Fuck sake.

[BaronS]

missus leave for work early this morning?

 

Bufo, if you read the original I state as much about using a single inline with a filter not being recommended. That's one of the possible reasons for the 2nd inline.

 

and secondly, why get upset about fact? Someone questioned using a 170mm fan with 150mm duct. I've posted evidence as to why. (ie. in this case it is supplied, if not designed, to be used in that manner)

 

The filter is still optional at this point. OK, that's mostly because so far I've raised nothing but dry popcorn in the cupboards. BCS.

 

Guy in the US has actually invented what may be thought of as 'lop sided wheels', and making sqillions out of it. They're used in 'rough surface roller skates' and I bet all his mates thought he was crazy.

[bufo marinus]

If I didn't answer these mindless questions you'd have some other twit leading you further up the garden path.

You keep posting them, I'll keep responding.