question about a sealed grow tent...

Try this instead... 3/4" thick x 4' x 8' foam insulation board with a reflective mylar "hammered" finish. Polyshield is the brand name at the big orange store. Use flex-fix brand flexible (also reflective) duct tape to seal the joints. This tape is the exact same material as the reflective mylar coating on the foam board. Use some 2" x 4" 's to frame it and double up on the foam board for a door and hinge that foam door with the flex-fix tape right down the length of the left or right side of the door. The foam door should squeeze into a slightly smaller opening to maintain the airtight seal. The reason why I tell you to do this is because panda film is vastly inferior to 3/4" thick polyshield foam board. Matter of fact, polyshield foam board is used for cloning, reflective flooring and scrambling the infrared frequency of a heat gun or thermal imaging device. It is in fact the most indispensable material ranking second only to water.
To control odors to the tune of 100% elimination you must not maintain a 100% airtight seal of this room. You will need to keep an exhaust fan on at all times ( with properly rated carbon filter, make sure your fan can handle the static pressure load of the filter and still be effective at removing heat). To remove odors at all times, you need to maintain a negatively pressurized room. Simply create an airtight room, and then poke a small hole or two ( size of a penny is more than enough) on all four walls and the ceiling. Keep some kind of fan/filter combo going at all times and you will always remove odors as long as your carbon is not exhausted (my carbon filters are going strong for about three years now). You run the risk of releasing odors during CO2 injection if you shut off your fans.
With the money some people spend on CO2 injection rigs you could instead buy 100 beans, run a progeny test with them, find the super yielder/excellent quality elusive pheno and get way more yield in the future with a negative pressure room as opposed to a 100% sealed room. Hope this helps and best of luck.

Originally Posted by sum420

i was wondering what you guys think about this... plan on building a 6x6 tent out of pvc framing and panda film. is it possible to make a pvc tent with panda film completely air tight?

i plan on doubling the panda film by gluing two 6mm thick sheets togather, and than using a lot of silicon caulk/duct tape/insulation foam to try and seal it airtight... does anyone have any experince making a pvc frame tent airtight?
thanks for any help in advance

p.s. the reason i want to make it airtight is for co2 injection, and also to help control odor problems...

after buying all that pvc it will cost about the same to build the room out of 2x4's and drywall. and it will be a lot more solid and sealed. just my $0.02

thanks problem solver, i just read your post and it has a lot of good ideas and some very great information... i love this polyshield stuff already..i will definitely be taking this into account for my future builds... but i forgot to mention one kind of strange caveat, i need this tent to have terribly poor insulation. the reason for this is because i plan on using a 14k btu window a/c for cooling and it will be hooked up outside of the tent. i figure if i have no insulation and i drop the temps outside the tent, that it will help keep the temperature down inside the tent. i actually have a portable a/c i could hook it up inside the tent but im worried that my co2 will go out of the exhaust.


i should of mentioned that i already have a co2 rig setup, a cap extreme green house controller with fuzzy logic co2 monitering, and a co2 regulator with an electronic solenoid.. i just need to buy an actual co2 tank and i will be set... now im wondering if i use a carbon scrubber/inline duct fan recirculating the air inside the tent, will there be any issues with positive air pressure? im worried because my carbon filter uses a 1000 cfm inline duct fan that it might create enough positive pressure to create an airleak.

Originally Posted by ScoobyDoobyDoo

after buying all that pvc it will cost about the same to build the room out of 2x4's and drywall. and it will be a lot more solid and sealed. just my $0.02

thanks... now that i think about it would also probably be a lot easier to setup rather than dealing with all those different connection pieces for the pvc.

Originally Posted by sum420

thanks problem solver, i just read your post and it has a lot of good ideas and some very great information... i love this polyshield stuff already..i will definitely be taking this into account for my future builds... but i forgot to mention one kind of strange caveat, i need this tent to have terribly poor insulation. the reason for this is because i plan on using a 14k btu window a/c for cooling and it will be hooked up outside of the tent. i figure if i have no insulation and i drop the temps outside the tent, that it will help keep the temperature down inside the tent. i actually have a portable a/c i could hook it up inside the tent but im worried that my co2 will go out of the exhaust.


i should of mentioned that i already have a co2 rig setup, a cap extreme green house controller with fuzzy logic co2 monitering, and a co2 regulator with an electronic solenoid.. i just need to buy an actual co2 tank and i will be set... now im wondering if i use a carbon scrubber/inline duct fan recirculating the air inside the tent, will there be any issues with positive air pressure? im worried because my carbon filter uses a 1000 cfm inline duct fan that it might create enough positive pressure to create an airleak.

If the air is sucked from the tent and exhausted into the tent you should have a neutral atmosphere so you'll be fine, no positive expulsion.

thanks problem solver... do you think having an a/c outside the tent will help even if the tent is sealed?

How will you support weight of lights/fans? I would prolly recommend some form of metal tubing? Covering the tent in canvas? The panda film will tear much easier..

Originally Posted by sum420

thanks problem solver... do you think having an a/c outside the tent will help even if the tent is sealed?

Intake? No intake, no cool air.