size of room is 6ft long 7ft tall 3ft wide 400wt light outlet fan rvk 125 two 6 inches holes at the bottom one with anormal extractor fan revered to bring air in and plus air circulater fan on a normal day temperture goes to about 74 hot periods it rises to about 84 the problem im having is humidity if im running rk 125 the humidity drops to about 39 once tiurned off the humididty rises to 59 62 im not sure what the corect humidity should be i think 39 is a bit low could someone tell me how to bring it up without turning on fan cheers