Cheers for the advice guys, how often should i turn the fans on for ventilation?would one hour in every six be sufficient or do you think i should run them more often? I am not planning on dealing by the way i just plan to grow copious amounts of weed for myself and a few close friends to enjoy throughout the year.

Thanks again
elcapitano Reviewed by elcapitano on . Quick question about lighting and ventilation Hey guys im looking for some advice as i'm new to the indoor growing scene, i have just purchased two 1000w Prolight HPS lights with reflectors and have a loft 14ft by 14ft. I've lined the walls with tin foil (dull side out) and intend to grow around 40 plants, will this be enough lighting? I'm also worried about the amount of heat generated and my electric bills! Will i require two fans (one to extract and one to put fresh air in) and should they be running all the time or can i set them on Rating: 5