cheap and EFFECTIVE DIY water chiller

Thanks for this thread Legal. You're the ma.. you're the wom.. - You're the person!
I got one built from a window ac. Haven't used it yet (only tested). This gave me some more insight/ideas.

Peace.
 

legallyflying

Well-Known Member
nice, over a year and my original one is still trucking along. Been trouble free except for the time the water pump stopped working. Came home after work and the cooler was a SOLID block of ice. The dehumidifier tubing also had like an inch of ice on it. ooops.
 

midgaar

Active Member
How would one go about hooking up a thermostat to a converted dehumidifier? Or how could you bypass the controls all together so that the compressor and fan are always on when the unit is plugged in?

The dehumidifier I used does not turn on when plugged in and it's too big to just leave running 24/7.
 

kinddiesel

Well-Known Member
use a old freezer. cut a hole in it pipe in a small heater core for a car from an auto parts store 30 bucks . and fan attached to the core blowing through it. this goes inside the freezer . and the pump that moves the water plumbs into that core. and it circulates the water through the freezer . and you can cool 25 to 50 gallons of water . buttttt the temp is not steady. but it works . you can control the temp with a speed control fan that's inside the freezer . to a point with in a few. total investment is about 35 bucks . if you have a old freezer laying around . saves electricity . because the fridge stores beer .
 

midgaar

Active Member
How would one go about hooking up a thermostat to a converted dehumidifier? Or how could you bypass the controls all together so that the compressor and fan are always on when the unit is plugged in?

The dehumidifier I used does not turn on when plugged in and it's too big to just leave running 24/7.
Anyone know how to do this?
 

squirt1961

Well-Known Member
Yo Ghan, this setup will work great. I initially pumped nute water through but it caused build up in the coils. Now the coils just sit in the Rez, the cooler (or any container) just has water, the cooling element and a small pump. You only need 5-10 gallons of water in the container. This system is extremely effective and will quickly make your Rez too cold!!! I can drop 50 gallons at 75 to 65 in about 45 minutes. Try that with an eco-shit cooler.

Any dehu off craigslist will work. One that automatically turns on when it receives power will work best and allow you to put the coil pump and dehu on a timer. The it just turns on once or twice a day and runs for 30 min a time. Bam! Fully auto, cost effective chilling with minimal BS and hoses.

A couple notes: stainless coils only! Copper will leach and kill plants. If you only have one Rez it's not an issue but I move this from Rez to Rez and found that securely strapping the dehu to the water filled cooler will prevent the copper lines from getting kinked. Be careful when bending the copper into the cooler! Grab the long parts tO make the bends, the pre-bent lines are fragile!
Lastly, the smaller the pump the better.

Please post your results. I think you will be amazed, the water comIng back from the coils in your Rez will feel like bath water compared to the icy cooler water. It just sucks the heat right out of the rez!!

Disclaimer: all this info is false and this is by now means the cheapest and fastest way to cool your Rez. Please feel free to be a dick for the sake of just being a dick cause that just proves to me that your meds are schwag.
What if I'm not using a reservoir?

I only have a 5 gallon bucket dwc system with drippers run on air I've got 4 buckets like this running.separately

I would like to cool my water temp down to 68° from avg of 72-74°

What's my best bet other than buying an expensive water chiller its just not in my budget
 
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legallyflying

Well-Known Member
How would one go about hooking up a thermostat to a converted dehumidifier? Or how could you bypass the controls all together so that the compressor and fan are always on when the unit is plugged in?

The dehumidifier I used does not turn on when plugged in and it's too big to just leave running 24/7.

The temp control part is easy... ranco temperature controller. The dehu not turning on though.. that is a head scratcher
 

ttystikk

Well-Known Member
What if I'm not using a reservoir?

I only have a 5 gallon bucket dwc system with drippers run on air I've got 4 buckets like this running.separately

I would like to cool my water temp down to 68° from avg of 72-74°

What's my best bet other than buying an expensive water chiller its just not in my budget
Find a small AC unit. You may be able to do something similar with it.
 

ttystikk

Well-Known Member
Does it need to be in a window?

My grow room is in basement no windows.
Not necessarily, but it is going to be shedding heat wherever you put it. You'll need a plan for getting rid of that heat.

In my case, I scaled the sizing of my water cooling system up to the point where it handles all my HVAC needs for grow AND home. Not only was I able to place chillers and heat pump where it made the most sense for them, I've been recapturing my 'waste' heat for years and reusing it to warm my home.

The ultimate expression of this idea is the heat pump I'm installing; it removes heat from one water circuit and puts it in another. The cold circuit services RDWC systems, cools my growing spaces, while the hot side dehueys those same growing spaces, heats my house, heats my hot water and will provide heat for my garage, back patio, hot tub and even a driveway warming circuit so my lazy ass won't need to shovel snow...

...All while saving the home grower a small fortune in HVAC costs!
 

legallyflying

Well-Known Member
Lol. Driveway heater!! Fucking sweet!

Our co2 rez is a 12' diameter blow up pool. Heats the WH in the winter, we put it outside in the summer. Free hot tub!!

But it is kind of gross, we mega dose it with chlorine and toss all our bet pits, cloning trays, etc in it to Sanitize them.
 

ttystikk

Well-Known Member
Lol. Driveway heater!! Fucking sweet!

Our co2 rez is a 12' diameter blow up pool. Heats the WH in the winter, we put it outside in the summer. Free hot tub!!

But it is kind of gross, we mega dose it with chlorine and toss all our bet pits, cloning trays, etc in it to Sanitize them.
I wouldn't put a liquid cooled CO² burner on a cold water circuit on a bet, lol. But the hot tub idea has legs! One circuit will go heat mine, if it runs hot enough!

Tankless water heater would work fine on the hot side circuit, because of all the places to dump that heat all plumbed into the same system... and since the same hot water system also heats my house, it will be back to old times, heating the house with natural gas, LOL
 

legallyflying

Well-Known Member
Bet pits? Lol. Net pots.

Yeah, we are on a well so we could very well do drain to waste water on the co2 burners... but I'm fairly certain that anyone that actually wasted that much water will burn in hell.

Or, they should anyways.

How are things going stck? Dude, we have some gorilla glue at 6 weeks... holly shit is it frosty!! Fucking weird growth pattern... bunch of long stalks, but actually it's a vert growers dream.

Maybe I could drop.some cuts off? You got anything particularly nice?
 

squirt1961

Well-Known Member
I guess before I go crazy trying to find a dehumidifier and rig this up to circulate cooler water to my buckets I should find out if it'll make a huge difference my water is always right around 72° my goal is 68° So I guess my question is will that make a big difference. Don't get me wrong I'm all for anything that gives my grows a better chance at perfection. So each thing I can do to make it better I'm all for. But I am on a limited budget here I've never had great luck growing in soil pots and so far all three of my hydro grows have been great. I'm on disability and would like to keep growing hydroponically but can only add so many features or improvements per month so I'm trying to get the most bang for my buck. With I would've started doing this while I was still able to work I'd have the best of everything. Wishful thinking LOL. WOULD it be harmful to plant if I put a frozen bottle of water in one of my 5 gallon bucket rdwc systems and see if it makes a big difference I'm sure I'd have to change it out a couple times a day but that would be a way to see if its worth it for me at least I'd be worried about bottle hurting roots while getting pushed around by air bubbles
 

ttystikk

Well-Known Member
Bet pits? Lol. Net pots.

Yeah, we are on a well so we could very well do drain to waste water on the co2 burners... but I'm fairly certain that anyone that actually wasted that much water will burn in hell.

Or, they should anyways.

How are things going stck? Dude, we have some gorilla glue at 6 weeks... holly shit is it frosty!! Fucking weird growth pattern... bunch of long stalks, but actually it's a vert growers dream.

Maybe I could drop.some cuts off? You got anything particularly nice?
I'd take a proven GG cut in a heartbeat! And a good blue dream is always welcome.

I'm afraid you might be disappointed. In my humble strain stable, I only have cuts that live to grow tall, respond vigorously to training, yield like crazy and get you so stoned you'll forget your car keys... They're in your pocket.

I recycle all the reclaim water from my water cooled air handlers. Some days I don't need to touch the hose at all. 0.0 EC, plants love it.
 
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