co2 Controller Question

I'm thinking of switching to a sealed room. What co2 controller would you guys recommend that can shut off an exhaust fan if I want to dump fresh air on occasion? Or would you guys just avoid dumping fresh air during lights on? I've never ran sealed before, so any advice is appreciated? Any good articles/threads on running sealed???

TIA

Any CO2 controller with fuzzy logic. Titan, Autopilot..

I have been using a Titan Atlas 3 for about 2 years....never had an issue....works great for me.

You only want to use fuzzy logic if you are using a co2 tank, to prevent over running the set point. With a generator you don't need it.

To cut off the fan you want an environmental controller, it handles the fans, co2, dehu... Autopilot, Titan... Just watch out for the cheaper model, it only has a repeat cycle timer for CO2, not a sensor that reads PPM.

Sealed rooms are great. You technically don’t need a environment controller but it makes like a lot easier. You’ll need a mini split, dehumidifiers, co2 system and depending on the off gassing situation you might need a exhaust system and a passive intake to evacuate the gasses created by the materials in the room causing the off gassing. It’s nice to have the exhaust system in place as a backup in case your ac stops working and the temps rise dramatically..it’s better to over build the rooms for the ability to dominate your growing environment..dehumidifiers are a must. Plants respire 97%+ of the water they uptake. If you have 40 plants and they drink a gallon a day that’s 40 gallons of water that’s 320 pints, your looking at a couple big whole home dehumidifiers at least (2) 220’s...

Thanks guys.

I picked up a cheap harvest master co2 easi not long ago hope to get it dialed in properly