building grow cabinet

first time grower, wanting to design SOG veg/clone and flower chamber grow cabinet. Looking at 2d by 3w by 3t veg clone, and 2X3X5 for flowering. Looking for imput and ideas for what kind of intake and exhaust fans should I use. Will be using LED lights 240 watt

You can't go wrong with a 4 inch inline fan (~$70) and a variable fan speed controller (~$20). If you setup your grow space and trial run the lights for a few hours without any fans on and see that the temps are super hot and/or you'd like to also use a carbon filter to regulate odor (most likely at least one or both of these), I'd go with the 4 inch inline setup. If odor and heat aren't issues and you're running LEDs, you might be able to get by with a powerful duct fan (~$35) exhausting the warm air up top.

The first several pages of the journal link in my sig are all about my cabinet build. I run full size fans etc.. A/C, 600w hps etc..