Indoor Pre-grow Ventilation Questions

[bubblekarma]

Already there just add the hot air and wait 6 months


[video=youtube_share;qpHxv3lUgyI]http://youtu.be/qpHxv3lUgyI[/video]

Alright I was wondering if you had mold in mind when you were questioning lol. So I have mixed feeling about this. I live in a very dry climate where RH is very low (less than 50% almost year round) in the air. There's not going to be too much moisture in the air. Maybe I'm wrong on this?

The way I see it, I am pulling air from the basement, and dumping the air back into the basement. Not much is changing as far as adding moisture up there. I'm blowing air up there, but isn't the air I'm blowing out close to the air and moisture content I'm sucking in? IDK man I've thought about it before, but since there is no mold up there now, I was thinking it shouldn't matter. It's a dryer climate (and there is some ventilation throughout the space aside from what I would be dumping in). I hear your concerns though, the last thing I want is mold.

 

[Bilbo]

Dude thanks for coming through on that! I am a bit confused now though because the highest CFM rating of the TD100XS is 143CFM (or 203 if I go to the 5" ducting). When I am comparing fans, they all have very similar CFM ratings. How am I to know what will work for pulling through a scrubber whilst having enough airflow?

It's a bit like torque on a car engine as opposed to bhp if that helps? The TD Silent will pull that amount of air through a scrubber or not, the one you listed relies entirely on there not being any resistance, it's just the different design types. If you google "grow room exhaust fans" there are loads of forum posts describing them all, RVK type being the most popular witha good balance of price and power but not small enough for your purposes generally.

If you are worried it's not enough you can get a 5" scrubber next time with a 5" - 4" reducer but I'm pretty sure your set up won't need it.

 

[Guerrilla]

Alright I was wondering if you had mold in mind when you were questioning lol. So I have mixed feeling about this. I live in a very dry climate where RH is very low (less than 50% almost year round) in the air. There's not going to be too much moisture in the air. Maybe I'm wrong on this?

The way I see it, I am pulling air from the basement, and dumping the air back into the basement. Not much is changing as far as adding moisture up there. I'm blowing air up there, but isn't the air I'm blowing out close to the air and moisture content I'm sucking in? IDK man I've thought about it before, but since there is no mold up there now, I was thinking it shouldn't matter. It's a dryer climate (and there is some ventilation throughout the space aside from what I would be dumping in). I hear your concerns though, the last thing I want is mold.

This is what I'm battling right now too because I too was exhausting into my crawl space, I have very dry cold conditions in the mountains so I figured it would hurt as well.
Id rather be safe than sorry so I'm coming up with a new plan. Thinking about re routing my exhaust either to the dryer vent to dump outside and back into the duck work to my spare bedroom. I have super low humidity in the winter and everybody is dry and ashy like crackheads. Lol
the wife has been wanting to put some humiditifer to get some moisture in the air. So I'll kill two birds with one stone. Warm air coiming back into the room to heat house, and adding some moisture.

Trying to to give you some options I have thought of.
Not trying to thread Jack

 

[bubblekarma]

It's a bit like torque on a car engine as opposed to bhp if that helps? The TD Silent will pull that amount of air through a scrubber or not, the one you listed relies entirely on there not being any resistance, it's just the different design types. If you google "grow room exhaust fans" there are loads of forum posts describing them all, RVK type being the most popular witha good balance of price and power but not small enough for your purposes generally.

If you are worried it's not enough you can get a 5" scrubber next time with a 5" - 4" reducer but I'm pretty sure your set up won't need it.

I think I see what you are saying. So its more the fan type I am searching. I am more looking for one specifically meant for use in this type of application, as they are engineered for pulling air through a scrubber, where as the one that I have is made to run without a scrubber. So I need to look for specifically a scrubber blower or specifically a growing exhaust fan to ensure it's up to the task?

 

[bubblekarma]

This is what I'm battling right now too because I too was exhausting into my crawl space, I have very dry cold conditions in the mountains so I figured it would hurt as well.
Id rather be safe than sorry so I'm coming up with a new plan. Thinking about re routing my exhaust either to the dryer vent to dump outside and back into the duck work to my spare bedroom. I have super low humidity in the winter and everybody is dry and ashy like crackheads. Lol
the wife has been wanting to put some humiditifer to get some moisture in the air. So I'll kill two birds with one stone. Warm air coiming back into the room to heat house, and adding some moisture.

Trying to to give you some options I have thought of.
Not trying to thread Jack

I don't consider that thread jacking at all! I appreciate the information. I'm waiting for some new tools that I bought to come in before I actually make my holes (hole saws coming). So I have approx 1 week to figure out where I'm ducting my exhaust. The problem is space and room. It's hard to explain but once my cabinet is in place, it will be very difficult to remove to change ducting. Even though it sucks re-planning something, I'd rather re-plan it then re-do it (or have to both re-plan and re-do).

 

[Guerrilla]

I don't consider that thread jacking at all! I appreciate the information. I'm waiting for some new tools that I bought to come in before I actually make my holes (hole saws coming). So I have approx 1 week to figure out where I'm ducting my exhaust. The problem is space and room. It's hard to explain but once my cabinet is in place, it will be very difficult to remove to change ducting. Even though it sucks re-planning something, I'd rather re-plan it then re-do it (or have to both re-plan and re-do).

oh I hear ya. Same with my closet. I have a 4" and a 6" hole in my subfloor now and I'm standing around with my wank in my hand going " where the hell am I suppose to exhaust?" Hahaha
if you're u it is completely sealed can you just blow it into the room?

 

[bubblekarma]

oh I hear ya. Same with my closet. I have a 4" and a 6" hole in my subfloor now and I'm standing around with my wank in my hand going " where the hell am I suppose to exhaust?" Hahaha
if you're u it is completely sealed can you just blow it into the room?

Would it sound gay if I mentioned the fact that we are both standing around with our wanks in our hands? Uhhh.....

Haha well actually now that you mention it, this is my 2nd plan. Worst case I go back to my "original" plan which is venting it into the adjacent back wall of the other basement room. The main idea for me is to isolate hot and smelly air from being picked back up by the intake. I want to isolate the hot and smelly air as much as possible from the intake. Both basement rooms are open (meaning no doors), so if I vent into the other room I'm worried that it won't be as isolated as if I dump it into the basement ceiling. However, the amount of distance would be plenty for air cooling. The other thing I worried about is smell. If my carbon scrubber doesn't work and I still have smelly air coming out of my exhaust, it will travel through the rest of the house through the house heating vents.

But now that I type this all out and see it in text, I think I have changed my mind and probably will vent into the adjacent room instead of ceiling. I can always get some ONA and other things in the adjacent room if I need to cover up the exhaust smell. That would be easier to do in a room than it would in a basement ceiling .

 

[Bilbo]

Honestly bro, you really don't need to worry about smell once you've fitted a decent carbon filter. Give it a chance and if it's at all smelling try a more expensive Phresh filter, for example, that will definitely work. It's difficult to recommend brands or something specific because I'm in the UK but trust me, a good quality scrubber in a negative pressure grow room/tent will work.

If your ambient temps aren't too high in the basement you might find that it works well just venting into the same room as the cabinet is in, the warm air rises and forces the cooler air down to where your intakes are. As long as you've got a bit of fresh air getting in from anywhere at all you should be fine and perhaps then you could have the fan outside the cabinet (in an easy to make diy silencer box if necessary)?

 

[Guerrilla]

Honestly bro, you really don't need to worry about smell once you've fitted a decent carbon filter. Give it a chance and if it's at all smelling try a more expensive Phresh filter, for example, that will definitely work. It's difficult to recommend brands or something specific because I'm in the UK but trust me, a good quality scrubber in a negative pressure grow room/tent will work.

If your ambient temps aren't too high in the basement you might find that it works well just venting into the same room as the cabinet is in, the warm air rises and forces the cooler air down to where your intakes are. As long as you've got a bit of fresh air getting in from anywhere at all you should be fine and perhaps then you could have the fan outside the cabinet (in an easy to make diy silencer box if necessary)?

Im having to make a fan box to silence my 6" fan. It's loud as shit. Lol
im using plywood and putting acoustic sound studio foam inside it to silence the sound. But you have to make sure that the heat that is put off from your fan gets exhausted just so your fan doesn't cause fire hazard or over heat on you. If you need help designing a box I can show you what I have designed.

 

[Anthropolis]

Mine (Ventech) was loud as heck right out of the box at full speed, but had an appropriate speed controller ready and it's quiet enough on half or 1/3 speed and still moves enough air for this time of year. Mid summer it's mandatory full speed loud tho lol.