I'm not sure I would recommend this to anyone but here is the latest I've posted on my Wine Chiller setup using thermoelectric cooling. For maintaining constant temps its working great, but providing lows at night and highs in the day I started having real condensation concerns.
Its been about 6m without any real issues, but I would assume you would want more space for Neps and then your clearly better off with a compressor unit. Think more of a "beer fridge" than a refrigerator.
I'd recommend getting some of the GOOD LEDs out there as they produce very little heat and when your goal is cooling things it will work out better to pay more upfront for the lower heat producing lighting.
I got a "broken" wine chiller (peltier cooling) off Craigslist for $15, replaced the peltier module, removed the circuitry and hacksawed the control panel off and affixed it all to a ~1.5 foot long by 5 inch board. It sits under my terrarium and cools one container to 60-68 during the day, and 52-56 at night.
As for condensation, I just made a small shroud around the fan inside the container (can sling condensated water), and remove some of it with a baster every couple weeks.
Agreed with RSS on the size limitation though, but I am not complaining for a sub-$30 cooled enclosure.
From my experience, the #1 problem for all growers who like highland and ultra highland plants is the night temps drop.
I spend one year just to ajust and improve my highland setup.
My setup is very simple.
In my apartment, i have a room only for my plants. I run a A/C next to my setup, the air flux directly on my terrariums. This way, even with the massive full spectrum i throw in the tank, the temperature stay cool, at 24C max. Each terrarium in that room have a .5 inches hole on the cover. This way, my plants have a gentle air flow running slowly inside the tank and the relative humidity stay at 85%.
At night, when my timers close my T5 tubes, i add 3 little icepaks inside each terrarium, and with my A/C running, i can reach 15C with 80%RH.
I had to ajust my a/c to the right angle, because the cold air have to hit all terras. I also have to monitor the vibration, because of the a/c. That was bad for my plants, shaking all the time.
Also, i had to buy new window store pannels, because the sun pushed a lot of heat in the room, at the wrong angle.
I had to move the plants, because helis species like hispida or neblinae need cooler roots night temps. So i move these plants on the cooler side of my terra, where the a/c air hit the pannel. Many others lil details i had to set also.
For my temperate plants who need dormancy, i just open a window next to the setup. This way, my plants just fall slowly asleep in november, and when they are 100% dormant, i bag them and put all these lil guys in the fridg at 3C until next april.
I just open the bags once a month to add 2-3 water myst shots and to see if everything is ok.
So, you will need to 'try and learn'. Each lil details are important, and at the end, you will run the perfect setup for your plants, in your growing space and with your local RH% and temperatures.
Last edited by Maiden; 06-05-2014 at 11:17 PM.