Hi there,
With air conditioners, bigger is not necessarily better. For one thing, the larger the capacity, the more a unit will cost. Also, an air conditioner that is too small can't keep up with load requirements on a particularly hot day and one that is too large will cycle off and on too frequently, doing a poor job of dehumidifying the air, which degrades comfort.
The Split Reverse System Air Conditioner is a good choice as it makes less noise, is more efficient and can cool one or more rooms or an open space of up to 60 sq. meters.
sqm
www.myshopping.com.au/PR--291140_LG_S09AWN_Wall_Mount_Split_Reverse_System_Air_ConditionersAs far as other air conditioners go, one that is 10,000-12,000 BTU's would be your best bet for your size of room. You can check a great selection of air conditioners here
www.myshopping.com.au/PT--314_Air_ConditionersGood luck!
