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View Full Version : Air Ventilation QUESTION (please READ)


PrescriptionDrugs101
03-20-2006, 05:26 AM
Fresh air to plants whatever species they are is extremely important for healthy growth!!!

For fresh air ventilation I have a 6 inch circular booster fan that fits in between flexible aluminum ducting. (It is meant to be used with home central air conditioning. Placed within the air ducting it boosts the cool air up your vent ducts in your house to better cool the upper floors.)

Since the ducting I was already using for my 185 cfm blower for exhaust is 4 inches in diameter planned to use that for the ducting on my fresh ventilation.

Question will the 4 inch diameter ducting put pressure on a fan thats 6 inches in diameter and strain the motor or cause it to over heat? When the fan is on with no ducting attached it blows more fiercely than when the ducting is attached. I am worried that I will be overheating the fan. Maybe I will go out and buy some 6 inch wide ducting. But I don't want to if it doesnt matter.
frozentide
03-20-2006, 07:52 AM
I may be wrong but I dont think you will damage the fan... all that is happening with the smaller intake is that you are creating some slight suction.

anyother opinions?
turtle420
03-20-2006, 10:32 AM
Nah dude... keep it up... you might burn it, but I don't think so... and if you do, buy another one... it isn't like you burned a Fantech... (which is kind of un-burnable).

BTW: I've got a 6" duct booster fan too... have been running it for a couple of months now... non-stop... still hasn't burned.
mobay
03-20-2006, 10:56 AM
take this for example . if you hook up a 1 inch garden hose and turn on all the way the water will come out kinda slow, but if you hook up a 1/2 inch garden hose the water will come out faster and it doesnt hurt the plumbing. i had a 6inch inline exhaust fan hooked up to a 4 inch duct and the air flowed harder it was good. remember to have an fresh air intake on your box so you wont burn up the fan. hope that answered your question
sheist
03-20-2006, 05:58 PM
it doesnt seem very strainful to me, instead i see it creating suction.. 6" worth of power thru 4", the other 2" will have to be compensated..