Very unclear to me, and I'm sorry for this. I don't know where your AC is located. ACs are not CO2 Generators. The cool air by recycling the air mass by running it through the machine. No CO2 is added to this system. It will have what ever is currently in the air. Research more on this if you want to learn more about how ACs work. I really don't know how they do the thing they do. Not my cup of tea there. I know what micro nutes are. Last I understood there are none in rain water save for any micro organisms that may or may not be growing in the collection bin. They seem to love it huh? lol They told you this or they give you little clues? =)[/QUOTE]
No lol , my air con unit is the air con unit that is powering my the air con in my house, and my flower room sits right next to it in my loft , my question was does it draw in air from outside and cool it (meaning it would contain co2) or does it use a hydrolic pump to generate its own air ? i want to know this as 1 of the ducting pipes from the ac unit runs directly through my flower room ,...... so i could add more light and maybe exspand my flower room if this air is any good as its already cold , and yes they do love it , i have exsperimented with settled tap water , spring water from tesco and rainwater , same strains same enviroment , the rain water grow was healthier and produced better buds , bear in mind i grow in soil only and i dont use any plant feed of any kind ....again thanks for reply ....