Hi there, I need a bit of brainstorming here, I have renovated my attic into a bedroom/ studio incorparating a grow room wich is in one of the eaves, I decided to build 2 rooms joined by a small door, just visible on the left in the flower room shot and add a little mum room later so I have a veg room ( 1250mm useable height) and a flower room ( 1980mm useable height) my problem is with the air intake and transferance between rooms.








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if you look along the left of the veg room you will see white intake grilles, along the mid right are holes with 80mm black drainpipe ( sealed) leading to white grilles in the mid left of the flower room extracted by a carbon filtered 100mm rvk, ducting to a ventilation grille in my studio, fitted with a bypass for summer which vents into the loft space near the chimney breast, hey why waste heat .

The white grilles are part of a respirator filter, my original plan was to use the filters inserted into the grilles which gives me 100% lightproofing between rooms but I had temperature problems, 36c 76% humidity in veg room and 30c 65% in flower room and the reflective flooring was trying to break free from the staples holding it down .


As it is at the moment it's perfect, filters removed veg 28c humidity 45%, flower room 26c 55%.

Trouble is, now it's not lightproof, somehow I need a method of lightproofing the transferance grilles in the flower room from the exhausts in the veg room without impeding airflow, the grilles in the veg room are easy peasy, they intake from my loft space left and I'll just cover them with nylon tights to stop contaminents from getting in.

I would imagine that you need to construct a 'light baffle' of some sort. Can't help you there, specifically, but if you do a bit of a search for 'em, I know that others have constructed them, so you'll be able to get an idea....

Get a couple of meters of ducting, use pc fans to help move air and bend them 2 times with a 90 degree angle and maybe try to bend it a little more at the ends. That could do the trick.

http://www.uk420.com/boards/index.php?act=...2Blight+baffles
look at that mate, might help

i used cooker hood carbon filter on the inside of my passive intakes,and found when it's doubled over it's completely lightproof and doesn't impede airflow much.if i place a piece of paper on the outside of my passive intakes with my rvk 125mm fan switched on it sucks the paper to the intake and holds it there.

Thanks for the replies, I'm going to attempt to make a light baffle out of guttering, smaller side on the inside with a larger size over the top with the ends sealed and a slot cut in the top, I'll keep yo informed with pictures and progress reports..

Completed job, perfect.

half round 3" guttering with holes drilled on top, liquid nailed on wall, covered by 5" angular guttering with holes drilled in the bottom, all painted matt black.



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just got to tidy it up a bit...

Nice job, dude - looks real tidy and professional, like.

How did you stick your Mylar down so neat and flat?

, it's not mylar, the room is made out of duplex plasterboard, ( reflective on one side), 20p more expensive than normal plasterboard and a hell of a lot cheaper than mylar coating it, the seams are sealed with duct tape. , the floor is mylar, stapled down.

- looks real sweet, though - I gotta say!

Where do you get the duplex plasterboard from? Just normal suppliers? Is it the stuff that's sold on it's heat insulation properties?

someone correct me if i'm wrong but your supposed to put intake at floor level, or as low as possible.

nice job though

B&Q don't sell 'em but a local builders merchant does, £2.87 per 1200*900 board, yep they are the insulating ones.

thats the exhaust from the veg room, above veg lamp height, the rvk sucks air at floor level from the veg room, through that into the flower room,it works perfect now, exhausing both rooms, I'm getting 24.5 deg c 45% humidity in the veg room and 26.5 deg c 50% humidity in the flower now, see my 1st post for better pics

oohhh yeah

looks good m8