opinion needed

Okay so I've got my 8" fan now..gonna build a box for it to keep it quiet..

Now I'm trying to eliminate exhausting outside...current intake is my door with fan on bottom... Leads to laundry room..would I be fine to exhaust Into the same room if I put a hole in the concrete near the top? About 3 ft over and 5 ft above intake ? The intake is just a fan strapped to the door blowing in air.

I've had a few opinions but I need more..thanks

I am wanting to exhaust in top left of pictureU can see fan hole on door as well for intake.

Also..doss anyone else exhaust similar to this or inside their house ?

My filters 8" x 32 with 8" fan..I would use reducers at wall and my hood

what is the roof of the room made of example sheet rock ,if it is sheet rock id cut the hole in it and snake exhaust vent threw floor joist ,that would be easier to fix than a hole threw the cinder block .from the looks of it the room is next to outside wall ,maybe you could exhaust outside threw vent hole already in floor to outside vent .

old shol4evr said:

what is the roof of the room made of example sheet rock ,if it is sheet rock id cut the hole in it and snake exhaust vent threw floor joist ,that would be easier to fix than a hole threw the cinder block .from the looks of it the room is next to outside wall ,maybe you could exhaust outside threw vent hole already in floor to outside vent .

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The only place to go is the concrete block.. The cieling of grow room is my front porch..thats y I'm trying to eliminate window lol

cbuts05 said:

I am wanting to exhaust in top left of pictureView attachment 3344858U can see fan hole on door as well for intake.

Also..doss anyone else exhaust similar to this or inside their house ?

My filters 8" x 32 with 8" fan..I would use reducers at wall and my hood

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I exhaust to the room above my grow room. I built a custom filter box. It's just a cube with one wall missing (mounts flush to floor between the joists) instead I have weather strip foam sealing the cube to the above flooring. Out the bottom I have a 8" flange and my fan, inside is a hepa + carbon + loose aquarium carbon. I cut a standard floor vent hole in the floor directly above so from the room above it just looks and acts like an always running floor vent.

I would just buy a 8" to 6" adapter and a 6" to floor vent adapter and install like a floor vent. If your room is big enough to need the full flow of your 8", you can split it to two floor vents.

nomofatum said:

I exhaust to the room above my grow room. I built a custom filter box. It's just a cube with one wall missing (mounts flush to floor between the joists) instead I have weather strip foam sealing the cube to the above flooring. Out the bottom I have a 8" flange and my fan, inside is a hepa + carbon + loose aquarium carbon. I cut a standard floor vent hole in the floor directly above so from the room above it just looks and acts like an always running floor vent.

I would just buy a 8" to 6" adapter and a 6" to floor vent adapter and install like a floor vent. If your room is big enough to need the full flow of your 8", you can split it to two floor vents.

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So are you saying its ok to vent to my laundry room as well as take from it ? I have nowhere else to go really

cbuts05 said:

So are you saying its ok to vent to my laundry room as well as take from it ? I have nowhere else to go really

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I'm saying vent to the porch. You need to make the air take a decent trip before it can make it's way back into the grow room. I wouldn't use a fan on your intake, keep that passive.

nomofatum said:

I'm saying vent to the porch. You need to make the air take a decent trip before it can make it's way back into the grow room. I wouldn't use a fan on your intake, keep that passive.

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I can't vent to the porch just the window at the side of it I wish I could eliminate.. How come take the fan off the door ? I tgohbbt it would help cool the room by forcing in cool air faster then passive

you got a picture of the porch your talking about ,im not understanding the window thing ,if it is under your porch ,you can buy a muffler for your fan were it cant be heard a the least when there is traffic out and daily noise ,you can only hear mine about 2 in the morn till about 6 when all the critters come out for the day.

old shol4evr said:

you got a picture of the porch your talking about ,im not understanding the window thing ,if it is under your porch ,you can buy a muffler for your fan were it cant be heard a the least when there is traffic out and daily noise ,you can only hear mine about 2 in the morn till about 6 when all the critters come out for the day.

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Window on both sides driveway side blocked off

are those composite or concrete steps, is room directly under porch ,im thinking that if those are composite ,you can run that exhaust out to them,do you use window units or have central air ,window units make a lot of outside noise and it wont be noticed

Tough setup. What about cutting another hole in the door at the top for the exhaust and then routing some ducting down to the dryer exhaust. You can use a "Y" to connect both and then exhaust outside. You don't want to bring the exhausted air right back into the grow area. It would heat up real quick I'd think.

looks like a basement to me there should be vents in the floor somewhere to get outside air or it would be covered with mold ,i mentioned the composite steps because they are usally hollow in the middle and you could pull them out from porch about a inch and that would take care of the exhaust .jsb99 thats a great idea but he didn't mention how far a run he would have going to laundry room ,also is that a controled climate down there ,i no my plants love the fresh outside air

Is your laundry room enclosed or is it fully open and part of the basement. Like old shol4evr mentioned, plants need fresh air. If the laundry room in enclosed and you don't keep the laundry room door open you may have some issues with that...especially if you exhaust directly back into that room.

JSB99 said:

Is your laundry room enclosed or is it fully open and part of the basement. Like old shol4evr mentioned, plants need fresh air. If the laundry room in enclosed and you don't keep the laundry room door open you may have some issues with that...especially if you exhaust directly back into that room.

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The laundry room is a approx 7x7 and then down a hallway to a bathroom kitchen and stairs to upstairs..

The cellar is under the house.

My options are.

Window driveway side- no go nosey neighbour and heat window..I just have it blocked off with Styrofoam.

Window garden side left side of steps - current exhaust to outside..but I'd like to eliminate it.

My only other options are the door..or through the concrete.

I'd really not like to tamper with the dryer ( I'd have to go through concrete anyways for this.then along wall 3-5 ft.. But I've heard not to do this..

If I went from the too of the door ducting would be hanging across my laundry room. Lol.

I do have a sewer pipe outside but once again ducting would be seen running down the wall from the hallway..
If I was gonna go through the concrete I'd rather just cut a hole at the top and leave it exhaust there at the top

sounds good man ,keep in mind if you do pop hole threw cender block and try to sell house ,pepole will look at it as structural damage

Sewer pipe is beside white box I think that'd what it is lol..but either way just a bad spot

old shol4evr said:

sounds good man ,keep in mind if you do pop hole threw cender block and try to sell house ,pepole will look at it as structural damage

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Ya I'm a little weiry of making a 6" hole..I mean it can always be patched but still..its the front of the house brick wall lol

cbuts05 said:

I can't vent to the porch just the window at the side of it I wish I could eliminate.. How come take the fan off the door ? I tgohbbt it would help cool the room by forcing in cool air faster then passive

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Intake fans are only helpful in rare cases. They are more likely to cause a smell problem than they are to help other problems. If you intake at a faster rate than you exhaust you will make air find leaks instead of just using the exhaust. That means stinky air can get out without going through your filter. Better to make sure you have negative pressure by only running an exhaust, that way the leaks all leak in instead of potentially leaking out.

If you do run an intake, you would want to run a smaller size fan on the intake, run a 6" intake vs an 8" exhaust or a 4" intake vs 6" exhaust... Remember the filter reduces your exhaust rate, so same size fans with filter on exhaust will cause positive pressure and most likely smell leak.

cbuts05 said:

Ya I'm a little weiry of making a 6" hole..I mean it can always be patched but still..its the front of the house brick wall lol

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I'd stay away from cutting the concrete. That would be such a tricky thing to do right and difficult to correct.

cbuts05 said:

If I went from the too of the door ducting would be hanging across my laundry room.

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It would be an odd setup, but you could hang it from the ceiling so it's out of the way. Just an idea.

Is your bathroom down that hall in the cellar? Maybe you could run a long duct to it and tap into the bathroom exhaust somehow.

cbuts05 said:

Window garden side left side of steps - current exhaust to outside..but I'd like to eliminate it.

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What are the issues you're trying to avoid with the current exhaust? Is there a way to modify it to work?

Also, if the ceiling to the cellar is plywood and the floor to the room above, you may be able to cut a hole and put a vent on the floor so it looks natural.

One more idea, if you can cut into the cellar ceiling right against the wall where above it would be within the drywall of the upper room, you could cut the drywall and run the ducting in the wall itself and then vent it outside somewhere outside at a higher part of the house. There are outside vent exhausts you can get at home depot that would make it look like it was supposed to be a part of the house. Not sure you can picture that the way I described.

Just trying to brainstorm ideas. Hope it helps.