As soon as the exhaust fan kicks off the humidity will shoot up. This will cause a lot of problems in the grow. If you have a tent full of big flowering girls the RH will hit 100 in less than an hour and if the temp is still too cool to kick the exhaust fan back in you will be in trouble.
My exhaust fan is connected to my ac infinity controller and is set to ramp up when it gets to hot in the tent and stop if it gets to cold and constantly run at a lower setting so there is good air flow when temps and humidity are in a good range so that’s under control I’m pretty much doing what you have said but in reverse the exhaust is now venting outside and fresh air is drawn in from the garage the garage is well ventilated for sure so it is fresh air, the tent has a temp controlled heater in it as well which turns up when it gets down to 23 degrees Celsius temps are sitting pretty at like 26 - 27 and humidity is 55-60 the plants are super healthy and air flow is good but the yea only did the re route of the exhaust vent last night so I will see how is goes today
The garage is fairly large and I’m thinking of running an ozone generator in there anyway just for safe keeping, does the size of the generator matter ? The garage is about 8m x 5m x 2.2m
High RH has never been a problem for me during the winter, even when using a setup similar to the one I recommended to OP (the ambient RH here in winter is like 25%, so often I have to ADD humidity). Also, if he's running sufficient HID lighting in there that should generate enough heat to cycle the fan on and off several times per hour. At least that's what I observed with my setup.
Yes, ozone generators will be rated for the size of the room in square feet or the amount of air they can process per time in cubic feet per minute (CFM).
Alright I will change my filter as well
Make sure you have a good sealed connection from the filter to the fan. If you have leaks that are bypassing the filter it'll cause the same problem.
Yea they do already have a good connecting no leaks I do think maybe the quality of the filter and the recirculating issue was causing most the issues, I’m deffs struggling for good negative pressure I think I have to much open ( two mesh vents either side of the tent down the bottom) the tent is good quality but a good tight seal around the front zipper doors is pretty bad top and bottom joins where the horizontal and verticals Center zipper meet don’t close together completely so I might close up the vents all together and just let the tent leak through the shitty zipper design see if that helps for the negative pressure but then again at the same time I would be worried that air flow into the tent would become to little
https://herbals.co.nz/products/eclipse-grow-tents-220-x-120-x-200cm?variant=40056758148&gad=1&gclid=EAIaIQobChMIldKhlZyNgQMVEZlmAh3-VgufEAQYASABEgLRffD_BwE This is the tent pretty much the best make available in New Zealand
Now that I recall I don’t think the tent is leaking at all and the negative pressure is actually pretty okay because when I open the door to the room that’s in the garage there is literally no smell just smells like the timber I used to build the room it is only in the garage that it is venting into has the smell, so filter is probably a dud, I bought the set up as a package so I doubt they would refund just the filter I can ask if they would swap it but I’m probably better off replacing it and keep the shit one as a back up in case I need it somewhere else
If the sides of the tent get sucked in you are good for smell.humidity on the other hand will depend on the speed of the fan.
Tent sides do get sucked in a little bit but not a lot I think that the carbon filter is a dud
With open tent it does nothing with closed door you shoud get a faint smell at least i get it on my 3x3 tent and 100fi small carbon filter