I bought one of Keystone's 50 liter bottles to see how effective they are at removing water and an acceptable amount of Water generate side heat and proved a long-lasting theme. The noise level that the device emits was not a factor for my use. The device supported an 18 x 18 room with 31% relative humidity. Before purchasing the device, the average relative humidity in the room was 46%. After this purchase I bought a second device. It covers the garage that is part of the house measuring over 42 x 28. The relative humidity stays at 40%. How long they will last is not known. It's been a good buy so far.
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