Hi everyone, first time posting here — have read and read regarding building my first grow box but would still appreciate some opinions from those more experienced, before I go creating vent holes, buying fans etc. No photos I'm sorry as it's all in bits and pieces still!
Main Q is to do with ventilation — what sizes you'd recommend for intake/exhaust and fan size/CFM.
My box is small: ~95x60x50cm or ~3.1x1.6x2ft = 10cubic ft approx. Planning on single plant grows.
Plywood box and going to use soil.
Light: Supergrow LED Halo only 25W, but 420-720nm and I have read this should do for a single plant.
Was thinking that a small fan and CFM would do with the small size of box and not expecting too much heat from LED light. Was thinking one exhaust vent with in-line fan, one intake vent with passive intake only (with HEPA filter/lightscreens). There can be no odour so planned on internal carbon filter attached to exhaust fan (sucking through filter direct to outside box). I like the look and reviews for Noctura or Silenx fans.
So, small box, minimal heat from LED — ventilation is more for air circulation than removal of heat so I figured a 4" exhaust fan would do and pulling through a 4" carbon filter. Anyone think I should go bigger — 6" with 6" filter? I'm worried too small a fan will not pull through a filter...but also worried if I go too powerful it'll pull through the filter too fast and not give enough time to remove odour. Perhaps stick with 4" but also use a small inlet fan? Also figured if I start with small vent holes, I can always expand them if need be...but can't do the opposite once I've sawed holes in my box!
Opinions on whether this will work, or any other tips from those who are more experienced and wise would be much appreciated, thanks.
Main Q is to do with ventilation — what sizes you'd recommend for intake/exhaust and fan size/CFM.
My box is small: ~95x60x50cm or ~3.1x1.6x2ft = 10cubic ft approx. Planning on single plant grows.
Plywood box and going to use soil.
Light: Supergrow LED Halo only 25W, but 420-720nm and I have read this should do for a single plant.
Was thinking that a small fan and CFM would do with the small size of box and not expecting too much heat from LED light. Was thinking one exhaust vent with in-line fan, one intake vent with passive intake only (with HEPA filter/lightscreens). There can be no odour so planned on internal carbon filter attached to exhaust fan (sucking through filter direct to outside box). I like the look and reviews for Noctura or Silenx fans.
So, small box, minimal heat from LED — ventilation is more for air circulation than removal of heat so I figured a 4" exhaust fan would do and pulling through a 4" carbon filter. Anyone think I should go bigger — 6" with 6" filter? I'm worried too small a fan will not pull through a filter...but also worried if I go too powerful it'll pull through the filter too fast and not give enough time to remove odour. Perhaps stick with 4" but also use a small inlet fan? Also figured if I start with small vent holes, I can always expand them if need be...but can't do the opposite once I've sawed holes in my box!
Opinions on whether this will work, or any other tips from those who are more experienced and wise would be much appreciated, thanks.