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Yes, one reason more to go with insulation.

@zep_lover Thank you very much! :-) Especially your solution with the propane heater, the pump and the tote, will probably save me a couple hundred dollars. If I keep the tote in the growroom, I can keep the generated heat in the room. In summer I can put the tote outside of the grow room and...

what is better? mini split or dual hose?

ahhh I don't know... My ceiling height is 11.5 foot. and my setup is three 4x4 tables in a row. My room size is 15x7.5. If I use 1000 Watt Gavitas, I would hang them higher and at the same time I would get much more wall losses??? Also I heard that the 750 Watts have better spectrum (not 100%...

Hi, I want a CO2 propane generator and found one from Autopilot 4 burner (https://www.hydrofarm.com/p/APCG4LP). But that piece of thing costs in my country something around 550 dollar. But even the suggested retail price in US for 360 Dollar would be... I don't know.... I mean I could buy it...

You think I should go with 1000W gavitas and keep the ceiling height of 11.5 foot? Why?

There is one thing I am not decided yet.... I wonder if I really should make the ceiling 8 foot low. I have ceilings which are 11.5 foot high. But I think it is a bit too high... But I don't want to build the room and then realize I built it too low.... :/ How do I find out the right heigt for...

Thank you for that very very informative post :-) Ok. It seems like I live in a colder region like you ;-) I was wondering, why you need more propane in winter? I thought plants consume more CO2 when it is hot??? And you want to lower the temperature in summer more? I thought you get better...

Actually there is something that I am really wondering about.... If you have two rooms and you want a constant air exchange between them, then do you need to fans, each one pulling air into the other room, or is one fan sufficiently? I am just thinking if I just buy a big Systemair Revolution...

Thank you very much for that post!!! :-) Actually which strain are you growing?

The report states amazing results ;-) That fixture you build it yourself or you buy it?

Thank you for that interesting post!!! I just looked up in the temperature over the year in michigan and it seems that your climate is a bit colder in winter (both mostly single digits below zero) and a bit warmer in summer and you have less rainfall than me. So with your 1800 watts of LED...

I still have plenty of drywall and aluminium frames around. I will also use styrofoam, as it is cheap and insulates better than rockwool.

Perpetual. I think rez is too small for all three. Also I just figured out that I probably need to put the rez outside of the room if I use CO2, as it seems too drive the ph up. Wanted to aerate the rez solution by flooming.

120 pints is around 55 Liters. 55 Liters per 24 hours. Actually people say it is too noisy for bedroom. They use it for example to keep their basement dry. I am not sure about the heating times.... He might had to heat only when the lights were off.... An option would be to have the lights on...

What is the thing with the ions??? And is an exhaust beneficial in any way?

Sorry, I mean cubic feet. It is 900 cubic feet!!! A friend did grow there before and he didn't made the ceilings lower but used the full 11.5 ft height. He operated 3 x 600 Watt hids and needed to heat to get to something like 20 degree celcius only. He said, if it is outside around 10 degree...

@im4satori I did read one of your journals.... The satoris are really good. Actually I did grow them together with Hashberry in my first indoor grow in SOG. From seeds. I was pretty happy with the results. I am not sure yet, but I think I look for something closer to 8 weeks.

Ahhh... I just read the following... The humidity capacity of air at 0 °C is about 1/10th the capacity at 35 °C. So even if I have outside now 90 % humidity, it is not much absolute humidity and will be low relative humidity inside. The 900 cfm (EDIT: I mean cubic feet, it is also wrong written...

How do you grow them? How much do they yield and how long they need to flower? Also are they picky somehow?