It depends on how you are going to control everything. I would put several faucets around the greenhouse so you can use small hoses and not drag hoses around that can knock down plants. If you are going to control your misting system by hand it needs to be after the faucets so you don't turn on misters when you want to water. Then you can put a valve before your misters.If you are going to put it on a timer you need a solonoid valve in line where you would put your manual valve for the misters If you are putting a misting system in why do you need a misting fan?

Thanks so much bryan69. You answered my questions. I guess I don't need a misting fan then as it would be redundant. Perhaps I'll go with 2 faucets in this case.

You can split hose outlets as many ways as you like, but we decided to start with 4 dedicated water outlets. One for misting, one for drip irrigation, one for a hose and an open one we use for a 2nd hose on the other side of the GH to prevent knocking over pants when we water.

Thanks fuzzymoto! Well, this is a small greenhouse only 12' x 8'. It does come with a misting kit. I think the drip irrigation I can tie in with one of the hose faucets.

Now onto the electric. I would like to have a light switch and possibly two plugs. One on each side of the house. That way I can figure out my fans and heaters.

Now hopefully the HOA will approve it.

tey157-
Regarding the electric, make sure you use as heavy gauge wire as you can and have a dedicated circuit. A standard 15 amp circuit with 14 gauge wire can handle a load of 1800 watts, and most electrical space heaters are typically 1500 watts, so you will almost max out such a circuit even if nothing else is on it. I would recommend at least a 20 amp dedicated circuit (12 gauge wire) which can handle 2400 watts of load.

2 outlets = insufficient

I have 16 in a 20x23 and I use them all.
Lights, fans, controllers, heaters, pumps, valves, radio, beer fridge ;-)

I recommend more than 2 plus GFCI protection and "in-use" outlet covers on all of them.

Thanks you all something to consider while it's being wired.

Well, I got the plumbing done.