170 cfm fan question

DaleRoberts · Dec 11, 2010

I just purchased the 170 cfm fan and filter combo from htg and it showed up at my door this week. I opened the box and plugged that sucker in and its really audibly loud from inside my grow room. I used a 4' to 6' adapter on the output side of the fan to create less pressure and it lowered the noise quite a bit. Now that I have opened up the ducts on the fan, the noise I can hear the most comes from the carbon filter. It makes the most of the woosh sound.

My question is...What can I do to make this fan stealthy as possible? If it means I will have to build and insulate a room inside my grow room then its gonna cost a few bucks I'm sure. Any of you have any ideas you would be happy to share on this? I am a legal MMJ patient but I have kids and the fan will probably catch their attention if they are in the basement. I built my room under the stairs in a locked room that is not accessible to anyone but myself. I just wanna cut the noise down to save myself the questions from people who may hear the fan.

Thanks alot RIU! :joint:

zem · Dec 11, 2010

you can get an insulated duct, place it from the inside and curve it a bit. you can also build an insulated box to place over the fan inside room with an opening. anyway i think it's better if you at least insulate the room door. it's easy to do just hang insulation all over it from inside. also you can always claim that it's only an exhaust fan to vent your storage room so that your supplies don't rot and mold. i've seen fans in such rooms several places.

NLXSK1 · Dec 11, 2010

DaleRoberts said:
I just purchased the 170 cfm fan and filter combo from htg and it showed up at my door this week. I opened the box and plugged that sucker in and its really audibly loud from inside my grow room. I used a 4' to 6' adapter on the output side of the fan to create less pressure and it lowered the noise quite a bit. Now that I have opened up the ducts on the fan, the noise I can hear the most comes from the carbon filter. It makes the most of the woosh sound.

My question is...What can I do to make this fan stealthy as possible? If it means I will have to build and insulate a room inside my grow room then its gonna cost a few bucks I'm sure. Any of you have any ideas you would be happy to share on this? I am a legal MMJ patient but I have kids and the fan will probably catch their attention if they are in the basement. I built my room under the stairs in a locked room that is not accessible to anyone but myself. I just wanna cut the noise down to save myself the questions from people who may hear the fan.

Thanks alot RIU!

You can do 1 of 2 things.

Get a speed controller for the fan (get one that works with that particular fan). Dont try to use a dimmer, do it properly.

Get a muffler for the intake. You can buy these at hydro stores online.

170 cfm fan question

DaleRoberts

Well-Known Member

zem

Well-Known Member

NLXSK1

Well-Known Member

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