air cooler vs. air conditioner help!!!! (room at 100 stedy)

so i have a 250sf room that sits at about 90-100 degrees im looking at air coolers because my humidity drops from 50% to 25% once lights are on so would a air cooler work with the room...im trying to avoid more holes in my rented trailer...i have the heat maintained temporarily with pumping cold air from under the house to the room but its relay ugly and i hate having a hose from are bathroom to are closet ( rofl )

so my main question is with 25% humidity would i be safe with a air cooler to cool the room and bring the humidity or should i say f it and get a air conditioner to run a hose from are closet to are window o_O

p.s i only have one plant in there now and i call it gnome because its small as heck and iv beat the heck out of it but she keeps growing her leafs did not even crinkle or fold down :P

i have read several books. and they all said the same thing. if you pump CO2 into the room the plants can handle those higher temperatures.

While it's true that a plant will tolerate higher heat with the addition of CO2, it will still be able to grow, you need first a sealed room. Plus the expence of a good controller and tanks, etc....but when all is said and done you still have a heat problem.

Hey randomking,

Not sure what you consider an air cooler, but I am familiar with AC and with chillers.

A chiller system usually consists of a water to air heat exchanger, a resivior and a aquarium chiller (small compressor to cool water). Where low humidity is a problem you can keep the rez in the room you are cooling, leave the top off and evaporation from the rez increases humidity. The chiller needs to be outside the room.

Google Hydro Innovations, they make water to air exchangers (called IceBox) that are cold water devices, that done properly and with enough chiller capacity can serve in place of an AC system. They also make some great insulation pkgs to cover light hoods that cuts down on the radiant heat given off the lights.

As for AC systems one of the most energy efficent units is a small split system like Mitsubishi makes. These consist of a compressor/condenser coil that needs to be outside, or in a cool ventable area and an inside unit with coil and fan. These are efficent due to thier excellent rotary compressors. The least efficent is usually windowless units but these have the advantage of need only a 6" hole or so to vent hot air out of the room.

While 25% humidity is low it would be preferable during the end of flower then say 50%.
Also keep in mind that if you have a bunch of plants in there humidity will go up also especially during lights out.

Would need more info to figure sizing of chiller or AC.

OM

just an update i bought a air cooler (cooling humidifier) that brought my room down to 70-80 but my humidity went up to 50-75%....i know thats high but that is a ez fix with out introducing more heat :)

If there is enough air exchange in the room this should be fine. The plants will use less water