Not the usual set up! Advice please

A lot of people Hang a string or chain or wire from there hood a measured distance that way they can visually see just how far there hood is from the top of the plant.

I'm not really seeing anything wrong with your plant. Nutrient demand changes as she flowers and there is a redirection to grow buds instead of height and width.

 

Ninja DIY skills. If its a loft most likely it has soffit vents. A roof or attic does need to be vented so that humidity does not build up in it. Do you live in like an apartment in a house? If you can get some pictures of the space where you'd like to vent to or at least draw a picture of whats going on some help may be offered on the situation at hand. Never underestimate the creativity of people. I understand the need and want to up-size. I would love a room big enough to walk around and fully have access to everything I need in the room.

 

Missevo, I don't see anything to worry about. Color's good, seems happy. A couple of crispy leaf tips in the earlier set of pics but that happens. As long as it doesn't spread you should be OK.
Keep watching the runoff of your pH, don't over-water, and keep the air circulating as best you can without blowing her over. I like to see the leaves flutter lightly, which keeps moisture from developing between two leaves that are touching. When this happens the bottom wet leaf will usually get burn spots from where the water droplets magnify the light intensity.

Your earlier question on light distance - Lowd put up a good chart. As a general rule, I like to keep my 400W about 10" from the top of the plant directly under it. In your case, one plant only, center it and set the light up from that center point. Hold the back of your hand on top of the plant for about 30 seconds - if your hand is uncomfortable, the plant will be too. Warm, OK. Hot, no-no.

Will check back on you tomorrow night.

 

Hmmm, can't see anything like that but you said the pics don't do justice.
You won't have a CO2 deficiency if there's any air turnover in the room.
All I can suggest is be diligent of the basics -
Don't over-water, don't over-feed.
Do everything you can to keep temps no higher than 82F.
Try setting your fan on the floor at the door, turn off oscillation, turn it to high & let the fan pull the air out of the closet. Not recommended for blooming, but if the smell is tolerable during veg, that could cure your heat problem until your carbon scrubber arrives.
Do you have cats or dogs that go in & out? Do YOU spend time outdoors then go into your grow closet? Check for bugs. You'll need a decent magnifying glass; 10X is sufficient & not expensive.

Anytime you suspect problems, check pH every time you put anything through the dirt - water or nutes. You MUST have a way of doing this, can't over-stress the importance of a proper pH range. If you don't have a pH meter, invest $8 in a bottle of General Hydroponics reagent drops. It is not the most granular method, generally reads on 0.5 increments, but it will keep you out of trouble.Have you checked the pH of your run-off whenever you watered her? What was it? Growing in dirt, a range of 6.3 to 7.0 will keep lockout from occuring, while 6.5 to 6.8 is ideal.

7-7-7 sounds like a commercial grade fertilizer; I can't comment on what the recommended mixture strength would be for that; and I doubt it will have any of the micronutrients you need for a successful dirt grow. As long as you suspect problems I would stay away from that, in favor of something more organic.

I'm hydro & haven't used dirt since my outdoor days, long time ago, so I can't recommend specifics for indoor dirt. You should be able to find some good organic tea recipes in the Organic Growing sections here. I know worm poop and bat do-do are great, and you don't have to train them to crap in your dirt- you can buy the stuff. Compost (horse is better than cow, mule is best of all), neem cake, bone meal, fish meal, kelp, molasses, they all work wonders in the right ratios, but again, I won't stray into an area I have no recent experience with. Check this thread instead:
http://forum.grasscity.com/organic-growing/333940-post-your-organic-tea-recipe.html
Let us know about that pH and post some more pic's as soon as you can.
Keeping my fingers crossed for you.

 

Heh heh, like a good girl, love it.
If I were high enough, that second pic could convince me she's growing out of the toilet!!
I think you're ready to switch her to 12/12. Your side nodes are already going vertical, which is what you wanted to accomplish with the LST. And I'll bet that will roughly double, maybe even triple your yield Vs where you started with a bean stalk
She still looks healthy, but I would really work hard on getting that pH down. 7.2 is enough to start causing lockout.The quickest way is to flush her thoroughly with a few gallons of RO-water, If you dont have access to RO (WalMart sells it for drinking), then use regular water pH-ed to around 6.0. Flush until you get about 25% volume of run-off, then check the pH of the run-off to see if it came down. Repeat as necessary, and check the pH every time until you get it back to between 6.5 and 6.8

BTW, if you're interested in going organic for your next grow, start your research now. It can take a good organic soil mix a couple of months to percolate & develop all the beneficial microbes needed for a worry free grow. I'm completely satisfied with my hydro techniques, but I do envy the organic growers who could give a shit less what their pH is, or what their nute strength should be. It's all built in. One of these days when I'm bored and out of other project ideas I'm going to give it a try.

Be watching for more updates from you.

 

Id leave it on 24/7 if you can with out a heat issue.