[chomsky]

Well I am using LED so there's no heat to really be exhausted. If I run an AC in the room though I will have to exhaust that, which will also suck out the CO2. On a positive note however, since I'm coming into the winter I may be able to run my AC Without exhausting it it just depends where the temperatures and land. That would be awesome for me.

LEDs still put out heat, just not as much as hps and not as much off the bulb, it still produces close to te same heat watt for watt.

I don't understand why you would run an ac if you didn't need to and how it would accomplish anything without exhausting the waste heat

I'm sure you will come up with something that works tho now that you know what's up so to speak, there are many ways to accomplish what u need to do so just do some reading and draw out a few blueprints and you'll get it handled. Once you have a plan and some spesific questions just ask away and we will get this all figured out

[chomsky]

Originally Posted by OG Tree Grower

LEDs still put out heat, just not as much as hps and not as much off the bulb, it still produces close to te same heat watt for watt.

I don't understand why you would run an ac if you didn't need to and how it would accomplish anything without exhausting the waste heat

I'm sure you will come up with something that works tho now that you know what's up so to speak, there are many ways to accomplish what u need to do so just do some reading and draw out a few blueprints and you'll get it handled. Once you have a plan and some spesific questions just ask away and we will get this all figured out

Right on

Originally Posted by EastCoast710

either fully seal it.. and don't have exhaust.. just exhaust your lights. if your using co2.. grab a dehumidifier and AC.. and just seal the bitch. a lot of dudes in Colorado running sealed rooms aren't exhausting shit but there lights.

Air cooled lights are the worst invention ever made, it kills your light penetration and considering this is our limiting factor indoors that's just craziness. Buy an ac that can handle the load of open hoods, 3500-4000 btu per 1000w.

[Granger2]

Originally Posted by OG Tree Grower

It's not about your way or my way. It's carbon and it's simple, once it absorbs enough it needs to be replaced or recharged. Your grow might not need as much replacing as mine but at some point it will need to be replaced and not just blown out. Proper way is 830c for 30 mins in a rotary oven, or 350c for a few hours in a normal oven.

Most carbon filters are very much the same, drill out 5-7 rivets, empty carbon, refill and re-rivet.

Tree Grower,
So, your way is the only way? Are you saying that what I'm suggesting doesn't work? I'm here to testify that it does work. I have a Mt. Air sitting in my storeroom that was treated that way for 4 1/2 years. I retired it even though it still worked fine with 24/7 use.

Yeah I know how to replace the carbon. I just choose the easier way. The reason I retired the Mt. Air is because I didn't want to find the limit at an inopportune time. I think the carbon probably does have a limit, but I haven't found what that is yet. BTW, how do you go about getting the carbon to settle properly? Some people put it on top of their washer set on repeated spin cycles.

[Granger2]

If you're using a portable, you'll need to exhaust the heat from the unit. With a mini-split, a window unit, or a thru the wall unit, the heat is exhausted with normal installation. You seem to be talking about very inefficient portable A/C's. Doesn't matter what time of year, you'll still need to exhaust the waste heat. A/C units produce slightly more heat than cool. Good luck. -granger

[RB56]

Completely unscientific thought. I've had it in my head that a carbon filter should only last 1 - 1.5 years. Pretty sure I've seen the same posted here and elsewhere.

I have had a carbon filter fail after 18 months - the first one I ever bought. It was cheap junk with very little carbon in it. Instead of there being a device related law - failure in 12-18 months, it seems possible that longevity is determined by the volume (surface area, I guess) of the charcoal. So 5 times the charcoal may mean 5x the lifespan.

Just from what I've seen related in this thread, I'm going to adjust my thinking to this: A good filter could last 5 years or more, especially if it's given the reverse air blow out after every few grow cycles and cooked every few years. After that, replace the charcoal. Certainly better than buying new ones every year.

[Jhhnn]

I use two stage ventilation as described in the ventilation 101 thread. One fan draws air from outside the room & pushes thru the insulated & enclosed hood It runs with the light & vents outside in the summer & inside in cooler weather. Positive pressure in the ducting keeps room smell out of the airstream. The other fan runs all the time & is pulling thru a 6" Phat filter with a minimum # of taped joints in between. My cellar workshop acts as a lung room. Both fans are on variacs so I don't move more air than necessary to maintain temps.

Even with that, it was tough keeping summer temps down in a house w/o central AC & a big ass evap cooler using a 1000w system. With twin 315's, it's a lot easier.

It's easy to wear out carbon filters with VOC's like spray paint, parts cleaner or any number of things. I learned that the hard way spray painting in my workshop lung room adjacent to the grow space...

Originally Posted by Granger2

Tree Grower,
So, your way is the only way? Are you saying that what I'm suggesting doesn't work? I'm here to testify that it does work. I have a Mt. Air sitting in my storeroom that was treated that way for 4 1/2 years. I retired it even though it still worked fine with 24/7 use.

Yeah I know how to replace the carbon. I just choose the easier way. The reason I retired the Mt. Air is because I didn't want to find the limit at an inopportune time. I think the carbon probably does have a limit, but I haven't found what that is yet. BTW, how do you go about getting the carbon to settle properly? Some people put it on top of their washer set on repeated spin cycles.

Granger old buddy I didn't say your way wouldn't work I just said eventually it will have to get recharged. I do agree dust clogs the pores more often than not, making the carbon less and less effective, but when it gets to a grey ash like color it needs to be baked or replaced.i wasn't saying you were wrong at all. But the cheap carbon comment I didn't get, it honestly is all the same to me, I've never had a batch that didn't work as good as another.

I used crushed stuff these days and smack it with a rubber hammer and it all falls together nicely, I don't buy the pellets unless I have to because it's a real pain to get them all seated. If I'm forced to get the pellets I use a Christmas tree shaker

Humudity is what gives mine such a short life span, I keep the grow at 70 rh and after the fourth flower they will bypass smell, other grows that I help with that don't control there humudity the filters seem to last much much longer but never more than two years. I have tried to blow mine out before but it didn't work for me, probably because I ruined mine with rh.and they never got a chance to build up much dust