Carbon filter you use?

Airwalker16 · Aug 20, 2016

I have used a phresh with great results in the past but just purchased a Phat. The website by Hydrofarm is well made with a lot of data on it. I feel confident in it. I'll let everyone know what I think of it.

But what are you using? And what has been your best or worst experiences with Carbon Filters?

whitebb2727 · Aug 20, 2016

I use what ever and refill with the same carbon phresh uses. I got a 16 pound box for $80.

I also rebuild them with metal mesh and bake in the oven to refresh. I know it works because the police have been within 50 foot of the exhaust and didn't know.

I got pics somewhere in my thread to prove I rebuilt and baked them.

It stinks bad when you bake them though. It might not work in an apartment complex. I got a free old stove and put it in an out building. I wired it for both oven elements to come on to reach higher temps. 500 degrees for a few hours work. You can drill the rivets out and pour the carbon into turkey pans about an inch deep for quicker cook times.

Also over size your filter as big as you can. Like a 8 inch filter on a 4 inch fan.

Rusher · Aug 20, 2016

whitebb2727 said:
I use what ever and refill with the same carbon phresh uses. I got a 16 pound box for $80.

I also rebuild them with metal mesh and bake in the oven to refresh. I know it works because the police have been within 50 foot of the exhaust and didn't know.

I got pics somewhere in my thread to prove I rebuilt and baked them.

It stinks bad when you bake them though. It might not work in an apartment complex. I got a free old stove and put it in an out building. I wired it for both oven elements to come on to reach higher temps. 500 degrees for a few hours work. You can drill the rivets out and pour the carbon into turkey pans about an inch deep for quicker cook times.

Also over size your filter as big as you can. Like a 8 inch filter on a 4 inch fan.

I have a 4" carbon filter right now on my 4" fan, but you think it would be effective to put an 8 or 10 inch on my little fan? It's pushing 90cfm for a 50cf grow space. I had assumed you needed a big fan to pull the air through a big filter. If not, great idea. I can get adapters at the hardware store.

Airwalker16 · Aug 20, 2016

whitebb2727 said:
I use what ever and refill with the same carbon phresh uses. I got a 16 pound box for $80.

I also rebuild them with metal mesh and bake in the oven to refresh. I know it works because the police have been within 50 foot of the exhaust and didn't know.

I got pics somewhere in my thread to prove I rebuilt and baked them.

It stinks bad when you bake them though. It might not work in an apartment complex. I got a free old stove and put it in an out building. I wired it for both oven elements to come on to reach higher temps. 500 degrees for a few hours work. You can drill the rivets out and pour the carbon into turkey pans about an inch deep for quicker cook times.

Also over size your filter as big as you can. Like a 8 inch filter on a 4 inch fan.

I use a speed controller. 8" filters get up in the 6-900cfms. 4" fans pull MAX 200 CFMS. I think you're a bit overkill. 8" filter on a 6" fan is fine.

Airwalker16 · Aug 20, 2016

I've always heard to spray them with a high pressure garden hose til it's clear and then just let it dry in hot direct sunlite. Not taking it out of filter. Does your remove and bake method really work?? And how can you possibly pack it tight enough to make sure there's no open spots where air will take the path of least resistance and bypass your whole carbon bed?

whitebb2727 · Aug 20, 2016

Airwalker16 said:
I've always heard to spray them with a high pressure garden hose til it's clear and then just let it dry in hot direct sunlite. Not taking it out of filter. Does your remove and bake method really work?? And how can you possibly pack it tight enough to make sure there's no open spots where air will take the path of least resistance and bypass your whole carbon bed?

I tap it to settle the carbon. I carefully pile the carbon up to where when I put the lid on it is so tight I can barely put it back together.

That shows the metal I put in instead of the synthetic mesh so I can bake them.

Some will say it don't work. There is a lot of bullshit on growing sites. I did it and it works.

redi jedi · Aug 20, 2016

Baking the carbon does work. I used a concrete vibrator to get all the carbon back in. Was a PITA and I just say fuck it now and buy a new one

Airwalker16 · Aug 20, 2016

redi jedi said:
Baking the carbon does work. I used a concrete vibrator to get all the carbon back in. Was a PITA and I just say fuck it now and buy a new one

And what brand do you usually buy?

Airwalker16 · Aug 20, 2016

whitebb2727 said:
I use what ever and refill with the same carbon phresh uses. I got a 16 pound box for $80.

I also rebuild them with metal mesh and bake in the oven to refresh. I know it works because the police have been within 50 foot of the exhaust and didn't know.

I got pics somewhere in my thread to prove I rebuilt and baked them.

It stinks bad when you bake them though. It might not work in an apartment complex. I got a free old stove and put it in an out building. I wired it for both oven elements to come on to reach higher temps. 500 degrees for a few hours work. You can drill the rivets out and pour the carbon into turkey pans about an inch deep for quicker cook times.

Also over size your filter as big as you can. Like a 8 inch filter on a 4 inch fan.

So you're cooking the carbon that's been In a used filter, right? Not the brand new stuff? And are you saying you cut new metal cylinders of the same e diameters as the metal but out of mesh and rebuild with THAT instead?!

whitebb2727 · Aug 20, 2016

Airwalker16 said:
I use a speed controller. 8" filters get up in the 6-900cfms. 4" fans pull MAX 200 CFMS. I think you're a bit overkill. 8" filter on a 6" fan is fine.

Nope. Its never over kill. It doesn't matter that the filter can do 6-900 cfm. the fan will only pull what it can. What that does is spread that load over a larger area. The air moves slower the larger area and has more time to scrub the air. Plus the bigger you go the longer it will last.

Airwalker16 · Aug 20, 2016

whitebb2727 said:
Nope. Its never over kill. It doesn't matter that the filter can do 6-900 cfm. the fan will only pull what it can. What that does is spread that load over a larger area. The air moves slower the larger area and has more time to scrub the air. Plus the bigger you go the longer it will last.

I'm glad I bought a speed Controller cause I'm telling ya, it does help to be able to slow the flow.

whitebb2727 · Aug 20, 2016

Airwalker16 said:
So you're cooking the carbon that's been In a used filter, right? Not the brand new stuff? And are you saying you cut new metal cylinders of the same e diameters as the metal but out of mesh and rebuild with THAT instead?!

I don't bake the new stuff. I bake the old. They come with a panty hose like liner in the filter. I only replace the panty hose type stuff so it wont melt in the oven.

whitebb2727 · Aug 20, 2016

Airwalker16 said:
I'm glad I bought a speed Controller cause I'm telling ya, it does help to be able to slow the flow.

Speed controllers kill your fan. It just clips the sine wave and starts and stops it repeatedly. It can cause hums and shortened fan life.

I use a variac that adjusts voltage. Smoother and quieter and easier on the van.

That is the filter from the previous pics.

whitebb2727 · Aug 20, 2016

Rusher said:
I have a 4" carbon filter right now on my 4" fan, but you think it would be effective to put an 8 or 10 inch on my little fan? It's pushing 90cfm for a 50cf grow space. I had assumed you needed a big fan to pull the air through a big filter. If not, great idea. I can get adapters at the hardware store.

Think about it. How could a bigger hole suck less air? That all your doing is making many, many more holes for the air to go through.

Its actually easier on the fan.

redi jedi · Aug 20, 2016

Airwalker16 said:
And what brand do you usually buy?

CAN

Rusher · Aug 20, 2016

whitebb2727 said:
Think about it. How could a bigger hole suck less air? That all your doing is making many, many hole holes for the air to go through.

Its actually easier on the fan.

You're right. I'll be going to a much larger one now.

Thanks for pushing me in a new direction.

Cheers

whitebb2727 · Aug 20, 2016

Rusher said:
You're right. I'll be going to a much larger one now.

Thanks for pushing me in a new direction.

Cheers

You wont be disappointed.

Airwalker16 · Aug 20, 2016

whitebb2727 said:
Speed controllers kill your fan. It just clips the sine wave and starts and stops it repeatedly. It can cause hums and shortened fan life.

I use a variac that adjusts voltage. Smoother and quieter and easier on the van.View attachment 3762193
That is the filter from the previous pics.

What size varia would I want? I know the speed controller isn't the best option, but it does work.

Airwalker16 · Aug 20, 2016

This one seems a good deal eh?

http://m.ebay.com/itm/142088138387

whitebb2727 · Aug 20, 2016

Airwalker16 said:
What size varia would I want? I know the speed controller isn't the best option, but it does work.

3 amp variac.

Controllers do work just can cause problems.

Carbon filter you use?

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