Cakes
03-21-2007, 09:59 AM
A free standing air filter can be made from a bucket.
Put many holes around the bottom of the bucket. Fill the bucket with an odor controlling material. Put a fan on top of the bucket to make the air pass through the material.
The bucket can be filled with the well known activated charcoal or it can be filled with ONA. ONA stands for odor neutralizing agent. It can be bought at janitorial supply or baby supply or online. The ONA is a concentrated liquid so it needs to be diluted; one part ONA to nine parts water. The diluted solution is poured on ‘water crystals’ so the water crystals can soak up the solution and then it is all ready to put in the bucket.
Water crystals are also used for the soil of potted plants. The crystals help with water retention and so they make good carriers for liquid. The crystals can be purchased in garden supply for about $5.50 USD and they can be reused when they dry out. ONA runs $13 a gallon for concentrate and one cup can last months.
If activated charcoal is used, then it can be cleaned after the pores become clogged from deodorizing. Boil it for fifteen minutes and then rinse it in cold water for five minutes. The cold rinse reactivates the charcoal after boiling decativates it (the water temperature changes the electrical charge within the charcoal, isn’t that neat?). Use 3 tablespoons of charcoal per cubic foot of air to be deodorized; about 1 gallon per 250 cubic feet (75 cubic meters).
Traditional ONA buckets rely on holes around the bottom of the bucket to let the smelly air in and they work well (punch or drill a bunch of holes, at least twenty for a five gallon bucket) but better air flow could be had by putting a grate/screen down there so the level of the crystals or charcoal is raised above the level of the holes. That way the air flows in all the way before it is pulled upward by the fan. For charcoal filters, it is best to use a screen for sure
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will just get sucked straight up the sides of the bucket by the fan. A screen allows the air to get in there and flow upward through the material evenly. A screen can raise the level of the crystals or charcoal high enough so an intake duct can be attached to the bucket too. An intake duct can be used instead of lots of little holes around the bottom of the bucket. Maybe the bucket will be part of an exterior ventilation system. Maybe a free standing bucket filter is not wanted in the actual grow room if floor space is at a premium. Filters of ONA can be placed in the inline duct it’s self as well; maybe fill a panty hose with some moistened crystals and put it in there.
For bucket filters, a fan can be fitted into the bucket’s lid. There are lots of texts on how to attach fans. The Overgrow faq has texts about how to attach with rubber stripping/rubber grommets and other materials that help fans to be silent and secure. Some fans can be bought to fit without any adjustment at all. For instance, ‘Holmes’ brand fan will fit a five gallon bucket perfectly. They are sold at large home supply stores.
The Overgrow faq also has text on how to make fan speeds adjustable.
Big buckets do not always need to be used. A five gallon ONA filter can deodorize an entire house. Smaller containers can be used for smaller spaces. SWIM’s one gallon pots are six inches across and six inch fans are common (30cm). A coffee can with both ends cut off will do well if one uses panty hose to contain the ONA crystals and then attaches a fan to one end. The can is then laid on it’s side. If sheeting is used to custom make a cylindar like the coffee can, then the sheeting can make a cylindar whose diameter exactly fits whatever fan is being used.
ONA filters do a good job when cat litter boxes are a problem.
Put many holes around the bottom of the bucket. Fill the bucket with an odor controlling material. Put a fan on top of the bucket to make the air pass through the material.
The bucket can be filled with the well known activated charcoal or it can be filled with ONA. ONA stands for odor neutralizing agent. It can be bought at janitorial supply or baby supply or online. The ONA is a concentrated liquid so it needs to be diluted; one part ONA to nine parts water. The diluted solution is poured on ‘water crystals’ so the water crystals can soak up the solution and then it is all ready to put in the bucket.
Water crystals are also used for the soil of potted plants. The crystals help with water retention and so they make good carriers for liquid. The crystals can be purchased in garden supply for about $5.50 USD and they can be reused when they dry out. ONA runs $13 a gallon for concentrate and one cup can last months.
If activated charcoal is used, then it can be cleaned after the pores become clogged from deodorizing. Boil it for fifteen minutes and then rinse it in cold water for five minutes. The cold rinse reactivates the charcoal after boiling decativates it (the water temperature changes the electrical charge within the charcoal, isn’t that neat?). Use 3 tablespoons of charcoal per cubic foot of air to be deodorized; about 1 gallon per 250 cubic feet (75 cubic meters).
Traditional ONA buckets rely on holes around the bottom of the bucket to let the smelly air in and they work well (punch or drill a bunch of holes, at least twenty for a five gallon bucket) but better air flow could be had by putting a grate/screen down there so the level of the crystals or charcoal is raised above the level of the holes. That way the air flows in all the way before it is pulled upward by the fan. For charcoal filters, it is best to use a screen for sure
o
t
h
e
r
w
i
s
e
t
h
e
a
i
r
will just get sucked straight up the sides of the bucket by the fan. A screen allows the air to get in there and flow upward through the material evenly. A screen can raise the level of the crystals or charcoal high enough so an intake duct can be attached to the bucket too. An intake duct can be used instead of lots of little holes around the bottom of the bucket. Maybe the bucket will be part of an exterior ventilation system. Maybe a free standing bucket filter is not wanted in the actual grow room if floor space is at a premium. Filters of ONA can be placed in the inline duct it’s self as well; maybe fill a panty hose with some moistened crystals and put it in there.
For bucket filters, a fan can be fitted into the bucket’s lid. There are lots of texts on how to attach fans. The Overgrow faq has texts about how to attach with rubber stripping/rubber grommets and other materials that help fans to be silent and secure. Some fans can be bought to fit without any adjustment at all. For instance, ‘Holmes’ brand fan will fit a five gallon bucket perfectly. They are sold at large home supply stores.
The Overgrow faq also has text on how to make fan speeds adjustable.
Big buckets do not always need to be used. A five gallon ONA filter can deodorize an entire house. Smaller containers can be used for smaller spaces. SWIM’s one gallon pots are six inches across and six inch fans are common (30cm). A coffee can with both ends cut off will do well if one uses panty hose to contain the ONA crystals and then attaches a fan to one end. The can is then laid on it’s side. If sheeting is used to custom make a cylindar like the coffee can, then the sheeting can make a cylindar whose diameter exactly fits whatever fan is being used.
ONA filters do a good job when cat litter boxes are a problem.