You could mount the window A/C on the roof of the structure your going to build inside the garage and vent it out that gable vent that magically showed up.
It's not to hard running wires but it sounded like you already have the wires running. You just need to identify exactly where they go. To turn an existing line from 110 to 220 takes about 20 mins(approx). The hard part is making sure you know exactly how the line is run. The process to switch from 110 to 220 is so easy you'll think it can't be that simple. Any line can be converted to 220V. All you do is make sure you know all the outlets that are connected to the line(circuit) and label them 220V or better replace them with the proper 220v outlet so you or someone won't be able to plug the wrong thing into them in the future. Now open your breaker box find the line you want to switch from 110v to 220v. Take out that breaker and replace with a double pole breaker of the correct amperage for the line in question. Reconnect the black wire and then remove the white wire from the neutral/ground bar and connect it to the other pole of the new double pole breaker. your done! (now I do this live but have to suggest that you kill the "main power" (top 2 breakers that has 100amp printed on it)
Now that I said all that your garage/shed line sounds like it is already set up, just need to identify where/how it is run. The breaker is there and the line is going somewhere in the correct direction.
I hear you on this one but I'm think the portables will do the job too. I do like the idea of two small ones if you have the room and cash. There will be times that one might be perfect? you will need to plumb the condensation to drain to something.
Yea that dose sound good too.
Grrrrrrrr................I forget who said it, but someone on this site said that controlling temperature/airflow while also being tasked with controlling odors is the hardest part of indoor growing.
I'm starting to agree with him.
Also Caz, not sure I'm able to turn that garage/shed line to 220V because there are some light fixtures that run off of that, so I'd need to do it to one of the new 110V lines that I had installed.
That being said, how difficult are we talking?
And BTW, spoke with a portable air expert for about 15 minutes on the phone today, and he (I was shocked at his honesty) said that basically a portable won't do what I need it to do, and two of the same (14K) unit won't do anything if the intake temps are too hot (which they could be, on some/many days).
So, I need anywhere from an 18-24K BTU window unit to really cool it down.
Gonna mount it on my "structure", and put a Rubbermaid under it to catch any condensation.
Just need to figure out this wiring situation...............if I can't (I'm sure I could, but if it involves lotsa shit that I'm not crazy about doing), then I could (and will) go with two smaller (14K) window ACs that can run off of 110V.
Gonna partition the garage into a 15x10 enclosed room and a 5x10 "dead space", and gonna get a LARGE centrifugal fan (1000CFMish?) to exhaust the dead space, and use a 425CFM for intake, hopefully keeping it <95F 97% of the time so that the ACs have a reasonable chance at working correctly.
EDIT: I'd obviously be exhausting filtered air and intake-ing clean (outside) air through that "Gable vent". The "dead space" would be ~500 cubic feet (5' by 10' by 10'), so I think that even with the heat produced by the AC(s), exhausting the air twice a minute (1000CFM fan) should be able to keep those temps relatively close to outside temps and therefore allow the ACs to work fairly well, no? Anybody got a guesstimate as to if this would work?
Would also be running the majority of the HID lighting (2500ish watts) at night, so that even on hot days, the outside temps would be at about 80F when the second AC needed to kick on.............