Help W/ Portable Ac / Fan / Fire Safety Questions

[Johnny doer]

I am running a 5x5 tent with 1 1200 watt Led light. I'm using a 4 inch exhaust fan, 6 inch intake fan, and I hover around 82 degrees. I started using a portable Ac unit and vent it into my attic with a 4 inch centrifugal inline fan to help pull the exhaust out faster. My questions are below. Also, this is a garage grow.
1) the exhaust ducting and fan get insanely hot on the exhaust for the portable ac unit. Is this dangerous? I am using dryer ducting the flexible kind.
2) how hot is a 4 inch centrifugal fan supposed to get max? It's very hot to the touch.
3) can I just grow if Temps hover around 82 Fahrenheit?
4) how safe is it to use a led grow light, 6 inch inline fan, and 4 inch centrifugal exhaust fan? This is concerning fire safety.
Safety is my biggest concern over yield.

 

[Johnny doer]

Here is my setup

 

[DrMcSkunkins]

My suggestion would be to just cool the room with the AC and suck cool air from the room into the tent and exhaust the tent with the attic hose. It would require a big hole in the side of your garage if you dont have a usable window.

 

[Johnny doer]

Can you still produce a decent yield with Temps in the low to mid 80s? I have insulated my garage door and I am leaving my garage door to the house open during the day so the house ac can spread into the garage. I am on a 18 and 6 time schedule with the lights being off during the heat of the day.

 

[EventHorizan]

Can you still produce a decent yield with Temps in the low to mid 80s? I have insulated my garage door and I am leaving my garage door to the house open during the day so the house ac can spread into the garage. I am on a 18 and 6 time schedule with the lights being off during the heat of the day.

in veg that isnt real bad, but during flower, you will have airy foxtailed bud, worthless to me... Some ppl are fine with it I guess...

 

[Johnny doer]

Another hypothetical scenario. What if I use 2 if those exhale co2 bags to increase the co2? Also, since this is in the garage is there any safety issue with using these bags?

 

[DemonTrich]

Bags won't raise co2 unless in a small small enclosure.

I run a portable, and run 20' of exhaust. You need a bigger fan. 6" 440 c.f.m on speed controller. Your gonna burn the compressor up by not evacuating the exhaust fast enough.

 

[Johnny doer]

Is that why is was getting so hot possibly?

 

[DemonTrich]

Yup

I replace my fan about every 1.5yrs. The heat destroys the bearings.

Also, my entire exhaust is 6" r8 insulated ducting to reduce heat.

 

[EventHorizan]

Is that why is was getting so hot possibly?

Yup

I replace my fan about every 1.5yrs. The heat destroys the bearings.

Also, my entire exhaust is 6" r8 insulated ducting to reduce heat.

And insulated being the key word here johnny potseed... Yes uninsulated will move air, but some will be lost escaping the ducting, PLUS, a hot duct is ambient heat in the grow room, exactly what your trying to get away from.
pay for the insulated. you will thank me an demon later for that, I promise..

 

[Johnny doer]

Is it safe to vent that exhaust from the portable AC into the attic though? No chance of fire? I don't want to endanger anything. Kind of OCD about fire safety because my house burned down as a kid.

Also, are temps around 82 really all that bad? I have grown monster plants outdoor with the weather touching the high 90's.

 

[DemonTrich]

I've seen many exhaust in an attic. Your roof has exhaust vents anyways.

A 25' of 6" flex r8 ducting from home.depot is same $ as 25' of 6" flex duct w/o insulation from grow shop.

I dropped 4* in my lung room by swapping bare flex duct to r8 insulated ducting.