Simply calculate the volume of the growing environment to the nearest cubic metre. This is done by multiplying:

Length x Width x Height = Volume of your room in cubic metres (m³) and then multiply the answer by 20.

For example, a room of 3 metres x 4 metres x 2.5 metres high = 30m³ and 30m³ x 20 changes per hour = 600m³ per hour. Once this has been calculated, you can select the correct fan.
MegaOctane12 Reviewed by MegaOctane12 on . bedroom closet grow Ok i have a closet that is 2ft wide by 2 and a half deep and just under 7 ft tall, I'm going to use the top foot for placing a ventilation fan but it needs to be quiet as its running in my bedroom and i want to be able to sleep any ideas? The closet currently is coated with mylar and i have a 400w hps plus will be aquiring 2 125w cfls for veg. I'm going to be growing pp in hydro bubbler's im just germinating the seeds now three have popped in 12 hours i want to grow them to be massive Rating: 5