Titan Controls Kronus 2 Digital Temperature and Humidity Controller 120V - Perfect for Grow Tents, Greenhouses, and Indoor Gardening

I bought this for my CO2 enrichment, quite simply it won't turn the fan on whilst the CO2 is on which is perfect for a non sealed environment. The problem I have is the large temperature swings between dosing. For example, if you set the temp for 80, the CO2 turns off at the set temp and a 10 minute (hidden) countdown timer starts. No problem, right? Well yes and no. The main problem I have is that the Kronus must fall well below the set temp. So if it were set to 80, the fan will not stop until it reaches under 76 degrees or so. That being said, your ambient (outside) room temp must be at least ~10 degrees cooler than the lowest number you want to achieve.For me, this won't be a problem until late spring/summer hits. It simply does not cool off enough at my location during the summer months. This means I'll need an AC or chiller for sure, which kind of defeats the purpose because I would have simply built a sealed room in the first place.The dials seem accurate within a degree, same with humidity.Side note, the remote sensor also has a light sensor. From what I can tell this does NOTHING, regardless of light present or not, the fan/co2 will run. I was not expecting this and the manual states nothing.Setup is a breeze, mount and power on