I see some confusion here. Thee are a number of portable air conditioning units available, and NONE of them require ice or water. The important thing is to check whether the BTU output is suitable for the size of room you wish to cool. If you buy from somewhere like Lazada you will normally find in the product description the size of room suitable for the output of the machine. Machines that require water and ice (or freezer blocks) are not, strictly speaking, air conditioners.........they are air coolers. Two weeks ago, I invested in a portable air conditioning unit for our small bedroom, which I purchased through Lazada. The output is 7000 BTUs and the cost was 4400 Baht. the unit has wheels and can be stored out of the way when not being used. A wall mounted unit would cost around three times as much, including installation. The unit works well, but it was always going to be a compromise and only for temporary use at times of extreme heat.