Sealed room heat management without A/C or cool tube

Hey Everyone,

Just wanted to get an opinion on this:

I'm setting up my grow room to use CO2 (400W HID in use for lighting) and don't really want to use an air cooled reflector (due people stating a ~10% efficiency loss). AC is out the question due to price and difficulty sourcing mini split A/C where i am.

I'm looking to seal the room, then have a fan (with scrubber) suck the warm air into a vessel (such as a large water bucket) which could possibly be in a small refrigerator or attached to a water chiller within the room. The idea being to essentially "water cool" the air when needed. I could then just fill the vessel with cold water daily. Of course, this will suck the CO2 out too, but i can refill the room. Temperatures are the main issue here.

Has anyone tried this? Any success? Would this even work?

Many thanks!

Your gonna have humidity problems.

Your looking for a magic fix but there isn't one.

SnapsProvolone said:

Your gonna have humidity problems.

Your looking for a magic fix but there isn't one.

Click to expand...

If only there was

Seal it, stick a fan in there and that is your job done

Looks like it'll be a plasma light then >.< ... from what i've heard they pump out around the same heat as a 150w mh so that should be easy enough to manage.

I can solve the humidity issues with a dehumidifier, so i don't mind that.

Thanks anyway guys!

Yep, dehumidifier does the job well but if you are vegging then keep the humidity up; you only need to dehumidify when you flower.

look at inda-gro induction lamps run 1/3 the heat of an HID. No ducting required at all and they are full spectrum veg - flower.

A 400w hid won't put that much heat out depending on ambient temps and room size it might not be a big deal. The dehumidifier will probably out put more.

Co2 for a 400w light? sounds crazy to me.

If you did that idea with a chiller or fridge within the room you would actually have more of a heat problem.

- Jiji

SnapsProvolone said:

Your gonna have humidity problems.

Your looking for a magic fix but there isn't one.

Click to expand...

right.....I was thinking the same. Just asking for trouble.

the only way I could think to cool the room would be to utilize a water cooled heat exchanger but you would need to invest in some serious equiptment to do it right. and for a four hundred watt grow? I just don't see it.

Buy a deep freezer and some stainless coil adapters and pond pump sit a bucket in the freezer filled with antifreeze then insert one coil of stainless with each end attached to hose then run one side of the tubing to what ever u need colder and the other to the pump in a loop and you've just made a home made chiller

that's an awful lot for a 400w gro

Agreed.

Occam's razor seems to apply here

Among competing hypotheses, the hypothesis with the fewest assumptions should be selected. Ventilate the room. No need to reinvent the wheel.

Cost about 75 dollars to make which is cheaper then a fan and I also run this to my res so not I by does it water cool my lights but cools my res temp

perfectroller89 said:

Cost about 75 dollars to make which is cheaper then a fan and I also run this to my res so not I by does it water cool my lights but cools my res temp

Click to expand...

Pics or it didn't happen.


- Jiji

Out of town for the week Google deep freezer water chiller . I also run this in a spiral pattern on front of the fan that blows on the ladys. Idea started from a simpler idea that college students use .

Since they are not allowed to have air conditioning units what some have done is take a fan and buy Cooper tubing then install to adapter to 3/8 line this this is feed to and from a 5 gallon bucket filled with ice water mix by a pond pump doesn't rly matter how strong

perfectroller89 said:

Out of town for the week Google deep freezer water chiller . I also run this in a spiral pattern on front of the fan that blows on the ladys. Idea started from a simpler idea that college students use .

Since they are not allowed to have air conditioning units what some have done is take a fan and buy Cooper tubing then install to adapter to 3/8 line this this is feed to and from a 5 gallon bucket filled with ice water mix by a pond pump doesn't rly matter how strong

Click to expand...

So you buy a deep freezer, copper tube, heat exchanger, fan, pump and misc hardware for $75?

50 deep freezer craigslist.
pump 15 to 20 ebay
Cooper tube 10 Lowes
Fittings 3 each lowes need 2

I would hope you already had a fan

So about 80 unless u want to get super technical
Then there 3/8 black line 32 cent a foot antifreeze 2 dollars max
A drill bit 2 dollars .glue/sealant max 3 dollars .

Say 90 where can u find a good 6 in fan with ducting for less? Not to mention with this set up u can run c02 with out wasting it out the exhaust

portable ac craigs list 200 bucks. if you in mi pick one up from me free. throwing a 8k out

kinddiesel said:

portable ac craigs list 200 bucks. if you in mi pick one up from me free. throwing a 8k out

Click to expand...

If that 8k works well, I'll pay shipping on it if you have paypal and you're just gonna throw it out...

Best option Imo listed above