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I have an Iwata air cooler. I was so happy when I bought it cause it makes our house a little bit cold like an aircon for a very cheap way. All I need to do is to add some ice and water and there it goes, the air coming from it is no longer warm but a little bit cold. I said it this way because there is still no replacement for the real aircon. But what I appreciate the most is it's perfect for a small room and I can place it anywhere I like. This air cool happened to needs to be maintained on a regular basis. One thing I have learned from this is, we have to use this air cooler on a regular basis so it will not malfunction.
I bought one of these over the weekend, far too hot for me and my cats so I thought we'd try one as they're currently on offer at Argos for £44.99. The unit has an 8 litre water tank, oscillating function, humidifier, purifier, 3 speed fan, 2 ice packs and weighs about 10kg. I immediately tried it on returning home but with just water in the tank so the cloth in the back rotates through the water and the air blows through that to create the effect of a breeze across water. This wasn't very effective unless you stand right near the front and the temperature here was 32 degrees at the time so the water just got warmer. I had put the 2 ice packs in the freezer when I got home but the instructions advise leaving them there for 24 hours before use. I couldn't see how these 2 packs would be much help though, they are little square blocks about a centimetre thick and I could guess what would happen, the water would warm these packs up pretty quickly. I tried adding ice cubes directly to the water but these melted so fast the cooling effect didn't last long. I thought about buying spare ice packs then had a flash of inspiration! We had some empty plastic bottles kicking about so I filled these with water and froze them. The next day I half-filled the water tank with water, placed several of my homemade ice packs in the water and turned the unit on. Much more effective! So be warned you'll need plenty of ice unless you just want a fan effect. Overall it does what it claims to, it's not an air conditioner so it never claimed to cool the room dramatically anyway. It works well in our rooms, some are quite large, as long as I keep the ice supply fresh.
Challenge Air Cooler. I brought this in the heat of the summer but still find it useful on cooler nights, It's an evaporative cooler this means you fill the unit's tray with water and it uses a rotating cloth pad that goes infront of the fan unit and blows the water/air mix producing a cooler air temperature. The unit holds 8 litres of water and is supplied with 2 ice packs. You can place these in the freezer cool them and drop them into the tank unit to keep the water at a constant cooler temperature for longer. The remote control is simple off / on speed control ioniser oscillation Batteries are included in the pack. The unit has a timer function of 1 , 2 , 4 hrs in any combination. With a built in Ioniser it purifies the air also through the cloth like filter that you wash by simply taking off the rollers and scrubbing with hot soapy water, I also spray the cloth with dettol to kill any bacteria that i can't see before leaving to dry and placing back inside the main unit. The water tray is removable and easy to fill , the overall weight of the machine unfilled is 7.5kgs which for me is easy to move around as the unit comes on wheels also. I have used this machine a lot and seems relatively inexpensive to run electric wise , it's quiet and reliable and cools and keeps my large bedroom cool for around 5 hours a night. I paid £ 44.99 from argos for this neat machine.
Air cooler with humidifier function. 3 speed fan settings. Oscillation vertical louvres. 7 hour timer. Air purification function. 8 litre tank capacity.