Colder air is denser air. Grab a hisense from lowes. Throw a warrenty on it and never look back .I dont know if you have central air or a a/c unit in the room. BUT if you have central air, I once partially shut all the vents that was anywhere near the thermostat. That allowed the thermostat to be deceived and it worked harder and allowed more air to get forced into the grow room. That extra air allowed my AC to drop my humidity while still leaving the rest of the house habitable.