There are basically three reasons to use fans: 1) cooling (which you don't seem to need); 2) recirculating fresh air so that the plants get as much co2 as they can absorb; and 3) odor control. You don't seem to need fans for cooling, and if odor control isn't an issue then I'd just try it without and see if the air, by itself, gets recirculated enough for your plants to breathe and not suffocate. If they die or look like crap, then you'll need to do something to give them fresh air. But they might be just fine as is.
jamstigator Reviewed by jamstigator on . Are fans necessary? If my room is cold, is it mandatory to have intake and outake fans. I thought that if they are sitting in the dark at a good temp that air ciurculation wouldn't be a problem. The room is not insulated from the outside and has concrete walls. I already purchased the fans, but I'm sceptical to start drilling the holes cause of the noise factor. The room is gonna get cold soon and I'm flowering right now. I will be using oil filled electric heater when the light is off. Also the room has an Rating: 5