10 inch passive intake vent?

[cracker]

All the variables involved are getting on my big nerve! One thing I do know is I will have a 1000watt MH light on a 6 ft light mover. The 10 rpm motor has a delay at each end . Sorry but I don't know what type of reflector the light has. So generally speaking, how much area will this light effectively cover?

[pipeman]

well since the light rail is 6 foot long a grwo room about 6 foot long and 4 foot wide sounds about right

[cracker]

That gives me somewhere to start! Ok generally speaking of course, I have a 4 by 6ft area of effective light. I plan to use soil this round . How many plants can I fit in the area? How far do I need to space the pots ? Consider some reflectiive panels on the outside edges and rotating the outside plants with the center ones. Edited July 11, 2006 by cracker

[pipeman]

depends on your growing style. For the quickest harvest you would sog it. You would need a big mother that you could get heaps of clones off and then in the room go with 4 plants per square foot in 150mm pots. Veg for a week or two then flower. You will have over 100 plants in that space that could be pretty serious consequences if you get busted at the wrong time. Maybe a better solution would be to grow 4-8 big plants in that space and tie them down or maybe even put in a screen to help you train them out to fill the area before flowering. I have seen pics of grows where two plants have been scrogged out to fill rooms of this size.

 

Also I don't recommend using soil for indoors. If a simple hand watered system is what you're after go with coco IMO.

 

the reflective stuff you need is mylar and you can get it at most hydro shops. but if you painted the walls with a couple coats of flat white paint that is good enough.

 

but this is a big grow mate, bigger than your average personal grow. you sure you wanna do something this big for your first attempt?

[cracker]

Thanks Pipeman, To be honest I don't know what I want to do. Still not sure if I will get cloned plants or start from seed. I do know I will have the 1000wat t MH lamp It is a " Radiant"reflector from hydrofarms. The ballast is wired for 240 volts but was told by switching a few wires it will use 110. Not sure about that. 125 $ from a trusted friend .It has a used conversion MH to hps bulb which I plan to replace up front. Any body familiar with these reflectors? This is very early in the planning phase. Hell I don't know If I will actually do this. I have some serious decisions to make considering the consquences involved. If I do I will use this lamp to it's full potential. I have found more info on various filters and fans. The startup costs for the right equipment is very expensive. The hydroponics supplyer's are mighty proud of their wares! I will look at alternatives for this 1st round. If 8 plants is reasonable for the light coverage I should be able to keep a handle on the needed venting and such. I might even put a 10k bulb in the reflector and propagate corals!

 

 

I got a lot of good info from the boys in the chatroom last night. You gents were very patient with my basic queries. And cleared up a lot of things.

Edited July 14, 2006 by cracker

[stonedstump]

Hello there cracker.. i've been reading this thread and am wondering how you propagate coral?

 

Can you tell us abit more about it please?

[cracker]

Hello there cracker.. i've been reading this thread and am wondering how you propagate coral?

 

Can you tell us abit more about it please?

 

Iv'e been reading your posts as well! I'm interested in your box in the spare room idea. I thought of using the whole room but your idea sounds more practical to maintain.

As we all know the world's coral reefs are in decline and importing wild corals for marine aquaria is big business. There is a growing business at propagating corals and one can make a buck at it. BAsically a cutting is taken off a coral then placed in a shallow tank. They require proper lighting and excellant water quality with the right ph , tenps, salinity and nutrients ( microscopic plankton) in some cases high levels of calcium and other trace elements are required. Sound familiar? This is kinda off topic but if anybody is interested in marine aquaria, I'd be happy to show them where to find more info. Feel free to PM me!

 

found good DIY carbon filter plans that used a portable blower. Are these available down your way?

http://www.shopping.com/xPO-Lasko_655702_Stanley_Blower

specs say it pulls 2180 cfm's .

[cracker]

Now I have an idea just how hot this big lamp gets! I see just how important good venting and keeping the GR room cool is important. This one lamp would roast my 10 by 10 room with the door closed and no air moving thru it. I'm not sure what factors one uses to determine good turn over and in particular how to match the proper size carbon scrubber. Ok my room is 10 by 10 ft thats 22.4 cubic meters. lets say for now at least I will only use around half of this space with one 1000 wt lamp. do I match the fan size to this used area or the whole room regardless? The room calculator says minimum 666 cfm for this size room . Does this figure include the 2500 watt minimun ligthing also? I"m not trying to skimp here. just getting an idea of how to figure. As for filter size, sayI have the 10 by 10 room stuffed with the skunk, will a small filter be effective but require more frequent changes or is it the more plants the bigger filter needed?

[jaguarrh]

hey cracker...

 

here is my $0.02

 

lets say for now at least I will only use around half of this space with one 1000 wt lamp. do I match the fan size to this used area or the whole room regardless?

 

i think the critical point here is that, as you probably know, the primary function of the exhaust fan is to exchange the volume of air in the room in a given time period, not to cool the lights. there is usually a cooling benefit that comes with this air exchange but it can be considered incidental imo when you are talking about BIG lights (1000W)

 

for the purposes of the air exchange calculation, yes, you should take account of the whole room size (10'x10' in our case) as this is the air that needs to be exchanged.

 

as far as cooling goes, if you get a suitable sized fan to vent your room, and adequate air intakes (i use passive air intakes) there will only be a slight reduction in room temp if you are burning even one let alone two 1000W'ers.

 

Does this figure include the 2500 watt minimun ligthing also?

 

my guess is that with this amount of lighting in a 3m x 3m room you are gonna have to look at some kind of direct cooling of your lights. either cooltubes or air cooled hoods with stand alone fans (cheaper fans are suitable for this job in comparison to a centrifugal fan for a filter).

 

will a small filter be effective but require more frequent changes or is it the more plants the bigger filter needed?

 

the size of the filter is determined by the size of the fan rather than the number of plants. "the can filter" web page has a good chart that shows the relationship between fan and filter size and these figures can be used as a guide for any fan filter combo.

 

so, the room size determines the fan size. the fan size determines the filter size (or range of sizes... there is some leeway i figure). you whack that all together and you know that your air change requirements are being met. then you test your lights again and determine if further cooling is required direct at the heat source).

 

again, this is just my long winded opinion, i'm sure that more experienced ppl will find holes in my thinking, but it is a start.

 

hth