How big is the space you are going to be venting and how many watts of light are you using? In a 4x4 grow tent with 400 watts of light or more a 4 inch cant move enough air out to keep the heat below 88F and this is in the winter in a basement.
How big is the space you are going to be venting and how many watts of light are you using? In a 4x4 grow tent with 400 watts of light or more a 4 inch cant move enough air out to keep the heat below 88F and this is in the winter in a basement.
I ran a 600 watt HPS in a 4x4 tent and vented with a 4" fan and was able to keep the heat below 88°F. This was in a garage. The only time I had any issues keeping the temp at acceptable levels was in the middle of summer.
I use a dryer vent as well, just independent. She would murder me otherwise.
Have my 6" fan dummed down to 4.
Better off with some ona gel than the urinal cake I think, but also solid idea. Now to figure something to block critters getting in through the ductingI too am using an unused dryer vent for my exhaust air. AC Infinity 6" reduced to 4" at the vent itself. 450w LED, 3'x4'x6 tent; works just fine. Do the math, include all your ventilation 'add-ons' (filter, silencer, etc.) and keep it simple. Basement location, winter temp outside tent (passive make-up air) is at 71F in winter and 75F in summer. I have no trouble maintaining growing temps year round inside the tent using this method. I have hot, humid summers and cold, dry winters. Depends on multiple factors; it can be done. My ideal set-up would be to duct it through the roof just like a plumbing vent. Then, if any odor leaks whatsoever, it's above the roofline. However, the dryer duct from the basement works just fine. If nervous about odors, toss one of those urinal cakes in the last couple feet of the exhaust duct before it goes outside for added 'insurance'.
I had a similar problem, easiest fix for me was to put the filter on the other end. Also freed up some room in the tent.Better off with some ona gel than the urinal cake I think, but also solid idea. Now to figure something to block critters getting in through the ducting
We’re you running a dehumidifier too? I do and I might need to go down to two plants instead of four.
My 6" filter/fan feeds into a 4" dryer vent, but it's a short run of about 6 inches of 4" to a 4x6 adaptor, then about 16" of 6" duct to the fan. Space is about 200 ft^3, but only 4' x 3' area used for growing. One 350W light. 1-3 plants max personal. So far - so good, but if I expand at all, and increase cfm, I'll have to make it a 6" vent.
I too am using an unused dryer vent for my exhaust air. AC Infinity 6" reduced to 4" at the vent itself. 450w LED, 3'x4'x6 tent; works just fine. Do the math, include all your ventilation 'add-ons' (filter, silencer, etc.) and keep it simple. Basement location, winter temp outside tent (passive make-up air) is at 71F in winter and 75F in summer. I have no trouble maintaining growing temps year round inside the tent using this method. I have hot, humid summers and cold, dry winters. Depends on multiple factors; it can be done. My ideal set-up would be to duct it through the roof just like a plumbing vent. Then, if any odor leaks whatsoever, it's above the roofline. However, the dryer duct from the basement works just fine. If nervous about odors, toss one of those urinal cakes in the last couple feet of the exhaust duct before it goes outside for added 'insurance'.
I've ran a small dehumidifier in the tent and was still able to keep the temps in check. A 600 watt HPS puts off significantly more heat than a 375 watt LED. Ambient temps are going to be a factor and I run my light at night when it's cooler so the intake air is going to be at its coolest when the lights are on.
I don't know your setup or when you have your lights on but running in the evening or finding a way to pull in cooler air could make a difference in your temps.
I've ran a small dehumidifier in the tent and was still able to keep the temps in check. A 600 watt HPS puts off significantly more heat than a 375 watt LED. Ambient temps are going to be a factor and I run my light at night when it's cooler so the intake air is going to be at its coolest when the lights are on.
I don't know your setup or when you have your lights on but running in the evening or finding a way to pull in cooler air could make a difference in your temps.