9'x7' w/ 4,000 watts. How to most quietly run air cooled hoods?

[Blaze215]

Hi Folks,
The framing is done and I am in process of doing the electrical on a room that is 9' x 7' and will have 4,000 watts of light. My question is how to most quietly air cool the hoods? I have a 6" vortex that will be on in the room running the scrubber. I just turned it on earlier and I tell you, that is really freakin powerful so it got me to thinking how to make sure the exhaust from the hoods isn't loud as heck.

I will be using an 18,000 mini-split to cool the area. A question I have is with this much cooling power is air-cooling the hoods even required? Of course the split side to this is that I don't really want my A/C to be on 24/7 either.

If you have experience with this I would definitely appreciate your guidance. If you have pics.... even better.

Thanks,

215

 

[apartmentblower]

Hi Folks,
The framing is done and I am in process of doing the electrical on a room that is 9' x 7' and will have 4,000 watts of light. My question is how to most quietly air cool the hoods? I have a 6" vortex that will be on in the room running the scrubber. I just turned it on earlier and I tell you, that is really freakin powerful so it got me to thinking how to make sure the exhaust from the hoods isn't loud as heck.

I will be using an 18,000 mini-split to cool the area. A question I have is with this much cooling power is air-cooling the hoods even required? Of course the split side to this is that I don't really want my A/C to be on 24/7 either.

If you have experience with this I would definitely appreciate your guidance. If you have pics.... even better.

Thanks,

215

S&P mixvent fans are the quietest i've ever heard. their 6" sounds like a small bathroom fan. honestly with 18k btu of cooling you aren't going to need much to cool those hoods. you could run two s&p td-150x 6" in a straight line for each 2 lights and your a/c at that point is probably heavy overkill in my opinion, but thats good. depending on your climate and other factors you might not even need to run aircooled hoods

 

[micro gro]

Inline duct muffler.

 

[PonicallyMade]

Definately go with insulated ducting - cuts down a lot. You can get some of those insulated reflector covers if you want to go to the extreme.

Put a muffler on that recirculating scrubber if that noise is bothering you.

You actually wont have much noise from the AC'd hood as the majority of the noise comes from the entry of your ducting and exit of the ducting..air going through the hoods themselves doesnt make much noise.

You can wrap your fan in insulation to cut down on motor noise if any.

Remember to push through your lights rather then pull so you dont suck out any cold ac air, smell, or co2.

Peace
PM

 

[Blaze215]

Definately go with insulated ducting - cuts down a lot.

This is a great idea. I will definitely run with it.

You can get some of those insulated reflector covers if you want to go to the extreme.

I have never seen these. Any direct links?

Put a muffler on that recirculating scrubber if that noise is bothering you.

Done.

Remember to push through your lights rather then pull so you dont suck out any cold ac air, smell, or co2.

Now this is where there is controversy. I have heard from several folks just the other way around due to keeping the room pressurized.

I would love to hear some further feedback regarding these issues.

Thanks for your input PonicallyMade. It is definitley appreciated.

 

[macro]

Now this is where there is controversy. I have heard from several folks just the other way around due to keeping the room pressurized.

I would love to hear some further feedback regarding these issues.

Thanks for your input PonicallyMade. It is definitley appreciated.

I ran my room to push at first and it practically blew the gaskets out of my air cooled lights and air leaked everywhere.

I ended up switching to pulling/ The pulling actually created a better seal on my hoods and sucked the lens to the gasket.. it seems like this is how they're designed to run

 

[milehighmedical]

These vent fans are designed from the ground up to PULL.

The reason for pushing makes sense. I push because I didn't have a way to mount the fan past my light to vent. But, I'd rather be pulling... and will be soon when I finish messing with this air manifold.

 

[PonicallyMade]

I pull..but wish I could be pushing. lol. for one reason - smell!

Pulling is how I always ran and is all fine and dandy until the stink comes.

When pulling your going to be pulling stinky grow room air into your aircooled lights and exhausting them out. I always suggest pulling through a filter and pushing through your lights.

due to the contraints of my room I'm going to continue to pull, but try and ozone generator inside of my ducting (after the lights) before being pulled into the attic. Just have the ozone generator in the attic DID NOT WORK on my last grow (Pulling through aircooled lights w/ Can 100 recirculating in room)

It is super cool when the glass just sucks right up onto the reflector when pulling.

__

As for those reflector covers - dont have a direct link..but try google image search for hydro innovations shield.

Note - I personally wouldnt waste my money for the hood covers unless your trying to design a sexy looking growroom. Money could better be spent elsewhere in the room.


peace
pm

 

[Blaze215]

Here's a twist:
I had my electrician over yesterday taking a look at the wiring and getting everything set up so that I could go back in and pig tail the plugs into the system when he made a suggestion to me. He said rather than have an 18,000 btu wall mount:

why not just go with 2 x 8,000 btu units

framed into the walls staggered in height and tempstat. This would work so that one unit is let's say set at 78 degrees and is 5ft high from the floor and the other unit is set at 6.5ft high from the floor and set at 83 degrees. He said that the 18,000 btu unit was WAY OVERKILL and could probably get by doing it this way and just placing a whole house fan set on a tempstat to exhaust the garage at a certain temp.

What do you think?

 

[milehighmedical]

I have one of those and they're great, doin 1600w w/o sweating. I'm planning on stacking two when I get my electric upgraded and get a few more lights.

 

[Phillthy]

insulated ducting is all you need to quiet the sound. if exhaust noise out of the room is an issue then add a muffler.

 

[Blaze215]

I have one of those

MileHigh,
Do you have the mini-split or the traditional A/C?