Can I reduce 6" to 4" without cutting air flow to much????

[Michael Dee]

Well this is the last piece of the puzzle before starting. Want to vent outside my house from the basement. Figure I can drill a 4" hole through the cement and install one of those dryer vents. Here the question: The ducting coming off my fan is 6". Can I attach a reducer to this to attach to the 4" dryer vent going outside without impedeing to much airflow? My tent is only 56 cubic feet and I figure with the fan, I can control exhaust speed as well as noise. One more thing: Is it ok to install the carbon filter at a later time if needed? Thanks to all. Very excited to fire this baby up and see if I can really come up with positive results. Comments, good/bad/indifferent,etc. are always apprecaited.

 

[KitchenKhemist]

That depends on your fan, and it's ability under static pressure. With 56 cubic feet, you really only needed a 4" fan anyway (I say that assuming it's an inline fan). Is there an old chimney in the house? Those can come in pretty handy. What about your furnace/water heater flue? How is it oriented and how big is it?

 

[KushisSweet]

That depends on your fan, and it's ability under static pressure. With 56 cubic feet, you really only needed a 4" fan anyway (I say that assuming it's an inline fan). Is there an old chimney in the house? Those can come in pretty handy. What about your furnace/water heater flue? How is it oriented and how big is it?

kitchen you life saver... i have a room in the basement currently and ive been stuck on how to get fresh air from outside but if i use a old chimney i can just put it in there and not worry about a thing right? or would this be more of an exhaust? thanks man also michael how do you plan on drilling the cement wall with out the vent line being underground? thanks!

 

[KitchenKhemist]

kitchen you life saver... i have a room in the basement currently and ive been stuck on how to get fresh air from outside but if i use a old chimney i can just put it in there and not worry about a thing right? or would this be more of an exhaust? thanks man also michael how do you plan on drilling the cement wall with out the vent line being underground? thanks!

Chimneys are good for exhaust...that's about it. knock a hole in the brick big enough that you can attach an upward-facing 90deg elbow to your pipe and stub it in there. a screen on the opening never hurts. also, use a backdraft damper near your fan's outlet. birds and squirrels love dying in chimneys. you don't want one finding his way to your fan. patch around the pipe with quickcrete, hydraulic cement, hell...even spray foam will work. plumb your intake air from elsewhere in the basement. use pantyhose as an intake filter...just stretch it right over the pipe. See my post previous to this one (diff topic, still in GRD&S though, "is 185 cfm enough...," i think) on how to size your fan. time the fan to be "on" 30 minutes, off 15 during your "light" hours, and switch to 15 "on" - 30 "off" during dark. OR hook your fan to a thermostatic switch (search amazon.com for a LUX line voltage cooling thermostat...they're CHEAP!) THIS WILL KEEP YOUR ROOM PERFECTLY TEMPERATE. just don't forget, you'll still need the fan on a timer for when the lights are off. this requires powering the stat and timer from the same breaker before they tie back into the fan. shit...i could go on for days here.

just remember, being in a basement, you'll need a humidifier during veg.

 

[KushisSweet]

Chimneys are good for exhaust...that's about it. knock a hole in the brick big enough that you can attach an upward-facing 90deg elbow to your pipe and stub it in there. a screen on the opening never hurts. also, use a backdraft damper near your fan's outlet. birds and squirrels love dying in chimneys. you don't want one finding his way to your fan. patch around the pipe with quickcrete, hydraulic cement, hell...even spray foam will work. plumb your intake air from elsewhere in the basement. use pantyhose as an intake filter...just stretch it right over the pipe. See my post previous to this one (diff topic, still in GRD&S though, "is 185 cfm enough...," i think) on how to size your fan. time the fan to be "on" 30 minutes, off 15 during your "light" hours, and switch to 15 "on" - 30 "off" during dark. OR hook your fan to a thermostatic switch (search amazon.com for a LUX line voltage cooling thermostat...they're CHEAP!) THIS WILL KEEP YOUR ROOM PERFECTLY TEMPERATE. just don't forget, you'll still need the fan on a timer for when the lights are off. this requires powering the stat and timer from the same breaker before they tie back into the fan. shit...i could go on for days here.

just remember, being in a basement, you'll need a humidifier during veg.

awsome thanks but real quick question.. on that thermostat how would i rig this to it? basically what im guessing the thermostat will do is turn the fan on when the temp rises over my set temp until it cools down am i correct? also in the summers the humidity where i live is nasty. maybe 70% most of the time. and im routing ducting from outside the house to the room so if anything, in the summer id need a dehumidifyer im assuming correct?

 

[sixstring2112]

you might need both but my humidity was bad in my shop until i started growing in it. you can get a fan stat at home depot for about $24.00 it will work for cooling or heating but they only handle a 5 amp load.i run 2 of them and love them.the fan you posted just needs a cord,the fan stat plugs into the wall and then you plug the fan into the stat and set it. they are in the same place on the same shelf at the h depot i go to.

 

[KitchenKhemist]

awsome thanks but real quick question.. on that thermostat how would i rig this to it? basically what im guessing the thermostat will do is turn the fan on when the temp rises over my set temp until it cools down am i correct? also in the summers the humidity where i live is nasty. maybe 70% most of the time. and im routing ducting from outside the house to the room so if anything, in the summer id need a dehumidifyer im assuming correct?

Why outside air? Just curious.

 

[KushisSweet]

Why outside air? Just curious.

because i want to have co2 rich air for my plants. also so i can be recirculating air.. do you think i should do something different? please feel free to say anything. i have a room 4'9"x4'7"x7'1". exhaust to outside shouldnt be a problem i can already see where its going ot be. and if i dont have outside air then i have have a vent with a fan through the wall into the room.. that actually sounds easier to control the temps both in winter and summer. :/ whatta ya think?

 

[KushisSweet]

you might need both but my humidity was bad in my shop until i started growing in it. you can get a fan stat at home depot for about $24.00 it will work for cooling or heating but they only handle a 5 amp load.i run 2 of them and love them.the fan you posted just needs a cord,the fan stat plugs into the wall and then you plug the fan into the stat and set it. they are in the same place on the same shelf at the h depot i go to.

awsome thanks ill be sure to look for one!