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If you insulate your room well, and dont exhaust after lights out, run a dehumidifier at night, you won't need a heater. You might get a humidity spike this way though after lights out. But anyways, if your going to use co2 I assume your going to exhaust during or slightly after lights out...

venting warm air into attic in michigan winter = bad watch for condensation and mold - Jiji

I'm not saying it wont work, and by all means try it out. But I tried this in a small room with a variac. Adjusting it daily, I was still unsuccessful. - Jiji Edit - Also, I've seen a few grows in Northern Michigan. Only a couple have cooled this way. One was redrywalling his room with...

If you use insulated duct, condensation will just pool up in your reflector. And when I say pool, I mean that literally. What ever the cold air touches cool down the object massively, below the dew point, and causes condensation in a warm room. Such as a wall or ceiling or ducting. When its...

Not LEDs but Medicropper is doing this with Gavitas. He has a seperate chamber of air space that is fan cooled for top of reflector and ballast. I'm sure it would be easier with homebrew leds, as long as you designed for that purpose. Really cost effective way of getting rid of excess heat...

Cool. Maybe I am in denial lol. You know, maybe I will try a small led setup, for myself just to say I did it. If I ever get around to it. Not an experiment like what your doing which is more interesting. What I'd really like to do is have the terp profile analyzed compared to hps. - Jiji

Good luck to you. I'd like to see this grow. I'd bet you wouldn't do that well with leds, but I'd like it if you'd prove me wrong. The only people that seem to do well are small scrogs. Which if thats what your into than I could see using leds. - Jiji

I just used a general guideline. I'm not an expert on chillers or anything. I used a 1/10th for about 30 gallons. When a fan shut off and room over heated for about 24 hours, somewhere in the high 90s, I walked in and it was extremely hot and there was a huge puddle on the floor. For an instant...

I'm starting to wonder if I'm the only person not impressed by leds on RIU. - Jiji

Really I don't know about them. So take what I said fwiw. The case just looked the same as my active aqua. http://www.amazon.com/Hamilton-Technology-Aqua-Aquarium-Chiller/dp/B004LPMOTU...

It might as well say active aqua on it. I'm just saying I had a bad experience with mine. - Jiji

Sorry to be a post whore, and not trying to steal your thread. Haven't been in the market for a few years for a split so I didn't know. But after researching a lot of brands do now programmable thermostats, and wireless apps software etc. If you haven't bought a mini split yet, I would...

I have a mini split. But its not like Central air, you cant just go out and buy a thermostat and wire it to the terminals (there are none.) I've used splits that have brand specific wall mounted thermostats but they still didn't have the day and night feature. I dunno maybe this feature is...

Strange because I've never seen one on a mini split or window unit. - Jiji

The best method is to run a higher gauge wire. Why would you only want to run 10-3? How many feet? The cost won't be much different. The ac should be on its own breaker. And a normal minisplit electrical connection is outside with a service disconnect usually. Running 6 lights is a lot, and...

Yuppers. I'm not saying you have to go with jbj. Do your own research. But you'll find plenty of threads on the ecoplus and active aqua being junk. Depending on the size of chiller, and if you buy online, it may be cost prohibitive to ship it back and return if an issue arises. - Jiji

Did you read this article? It is a great one. Light dependence of photosynthesis and water vaor exchange chracteristics in different high THC yeilding varieties of Cannabis sativa L. - Jiji

Like I said, I have a jbj arctica and I really like it. Look on the reefer forums, they take their chillers seriously. I have a active aqua chiller that is junk. Straight out of the box the fan was hitting the condenser. - Jiji

I know someone who had their house burn down. No one lived there. Police got involved and a court battle that ended 2 years later with a misdemeanor settlement. The charges were insane, quite a few felonies, with no legal standing. This was a medical licensed grow. He told me he "made his own"...

4 lights aren't going to light up a 16x16 16x16 is pretty large for a flowering setup. Whats your budget and or goals? - Jiji