[yesum]

On the carbon being different. I think the pellet type is less effective than the granular type. The pellet type have been treat, powdered, then formed into pellets.

That is what I read anyways.

For the OP I would say change out the old filters and be sure you have negative pressure in the room.

[FireIn.TheSky]

CAN uses pellet carbor and it works well. I think the biggest thing is they vibrate them to minimize ait gaps.

[redlaser]

Like others have mentioned, use ozone on the exhaust, give it enough room/ time to mix with the smelly air.
I put an ozone generator at the beginning of twenty feet of ducting going out, it then goes into a 3'x3' wooden box/ homemade fan silencer, then 10 more feet of ducting before going through a large carbon filter to hide the smell of the ozone and any weed smell left

[budbasket]

Bet its a leak/not enough pulling from the fans to create negative pressure. I love phresh, super light and has always lasted 18 months-2 years.

[morningdewd]

same problem here highly overated MD

[Easy7]

Both ozone and carbon have tell tale smells. Ozone smells like ozone and carbon smells,like yeast.

Did you make sue the CFM are rated for the fan filter? Sounds like a lot of unscrubbed exhaust.

[bucketswithsoil]

what about a actual ionizer...???

[YetiOG]

Originally Posted by chomsky

None of the filters are over a year old. Room is mostly sealed. I do have an ac unit that kicks on at night to drop temps here towards the end of 12/12 but that's only at night. Ozone sounds like a good bet.

Charcoal filters dont suck at all. Everyone uses them and they work very well.

The problem is the actual is not filtered right?

Do you properly match the fan and filter? If it's not then that's your problem

[YetiOG]

Originally Posted by YetiOG

Charcoal filters dont suck at all. Everyone uses them and they work very well.

The problem is the actual is not filtered right?

Do you properly match the fan and filter? If it's not then that's your problem

A.C. not filtered... spellcheckenese

[chomsky]

Originally Posted by YetiOG

Charcoal filters dont suck at all. Everyone uses them and they work very well.

The problem is the actual is not filtered right?

Do you properly match the fan and filter? If it's not then that's your problem

Dude yes I have them paired properly. I'm growing four plants in a sealed room venting at night when the CO2 is off. My whole house in my neighborhood smells like a weed factory. And if you read earlier I have one brand-new filter and two others that are less than a-year-old. Maybe I'm just growing some super funkadelic crazy insane smelling hyper weed.??? Maybe nothing can be done???