WoW Mac, you got a real good memory. I had to go look for where I showed that (Hydro: Aero/fog LED grow table) to see what/where we were at then. It was the first trial run of 1/2 of Fogfognugen (4x4 tray with 660w of LED). After a couple of more trials the second tray was added and 2 more TI Pro blooms where added.

About six months later I built another fogfognugen (I had bought parts for 4 trays originally) that sits lower and the orignal was mounted higher, one set of trays above the other. I could not convince my partner to spend another $5,000 on LEDs so we experimented with HPS first. We tried a 600w HPS and did have have enough light, then went to 1,000 HPS, we found the LED could match finished wgt but the LED bud was better. So, tried the expensive bulb PSMH and they have worked great. 3k PSMH for most of flowering and change to a 10k bulb for last week to mature the trichomes.

Hey Tank,

I think I said above that using the light wattage/ BTU was just for lights, take a guessimate for the rest, if needed. Actually as a HVAC guy you know that if we have the insulation R factor for the 4 walls and ceiling and know the max temp differential between room and outside the walls we can calculate the BTUs needed to cool the room and maintain wanted temp.

Speaking of Rules:

Murphy's Law; "what ever can go wrong will go wrong"

Oldmac' Law; "Murphy was a bloody Irish optimist"

OM:jointsmile:
oldmac Reviewed by oldmac on . Air Conditioning Unit Help Hi. Does this work: 10,000 BTU portable a/c unit, cooling a 1000W HPS in a 4' x 6' x 8' room (192 cubic feet), exhausting air 20' UP through the attic and out the roof. The unit's exhaust is roughly 250 CFM. If this doesn't work, could someone give me suggestions on how to make it work? For example, what size a/c unit would work? Or, could I 'assist' the unit by installing an inline fan half way up the ducting, at around 10'? The problem with this latter solution is I don't know how to Rating: 5