ElementSpark
09-02-2008, 09:12 PM
I recently made a fan for my new grow box which is about 3'x6'x5', Optimum CFM from the calculator at: CFM Calc (http://cheaphydroponics.com/Merchant2/cfmcalc.htm) is around 100 cfm. With this in mind i made a trip down to home depot on concocted a fan and filter for under $35. Here it is:
2 - NuTone 50cfm fans $25.76 Fan Link (http://www.nutone.com/product-detail.asp?ProductID=10164)
1 - Carbon filter = $9.97
Duct tape
extension cord
scrap plywood or plastic or cardboard(not fire safe)
Take the two fans with the exhaust outlets pointing up but them together to make a triangle.
Diagram1 (http://spark.exofire.net/images/fan_dia1.png)
Run the extension cord and Enclose the triangle with material and duct tape
Diagram2 (http://spark.exofire.net/images/fan_dia2.png)
Then cut a whole in the face for ducting.
Diagram3 (http://spark.exofire.net/images/fan_dia3.png)
To make the carbon filter work with the fans, cut it in half, use the plastic grate that came with it and role it into a 3" tube to fit your exuast tubes. and cap the end with duct tape and any other wholes. here is my final product.
Final Product (http://spark.exofire.net/images/fan_dia4.jpg)
It works vary well for $35, a little loud but throw it in the attic and run ducting and you cant hear it.
2 - NuTone 50cfm fans $25.76 Fan Link (http://www.nutone.com/product-detail.asp?ProductID=10164)
1 - Carbon filter = $9.97
Duct tape
extension cord
scrap plywood or plastic or cardboard(not fire safe)
Take the two fans with the exhaust outlets pointing up but them together to make a triangle.
Diagram1 (http://spark.exofire.net/images/fan_dia1.png)
Run the extension cord and Enclose the triangle with material and duct tape
Diagram2 (http://spark.exofire.net/images/fan_dia2.png)
Then cut a whole in the face for ducting.
Diagram3 (http://spark.exofire.net/images/fan_dia3.png)
To make the carbon filter work with the fans, cut it in half, use the plastic grate that came with it and role it into a 3" tube to fit your exuast tubes. and cap the end with duct tape and any other wholes. here is my final product.
Final Product (http://spark.exofire.net/images/fan_dia4.jpg)
It works vary well for $35, a little loud but throw it in the attic and run ducting and you cant hear it.