We bought this to help control the humidity inside our travel trailer to prevent deterioration of materials over time. We would like to keep the humidity below 50% inside. Based on data collection over a 1-week period, we have determined that this device is just not up to...
We bought this to help control the humidity inside our travel trailer to prevent deterioration of materials over time. We would like to keep the humidity below 50% inside. Based on data collection over a 1-week period, we have determined that this device is just not up to the job, and that the description overrates what this device is capable of. Our trailer is a 27-foot Airstream, about 180 square feet of living space and 1100 cubic feet or so. We found that operating the device had little or no impact on interior humidity. Our testing involved 7 periods of approximately 8 hours of operation, usually overnight, during which the trailer windows and vents were kept closed. Temperature varied from 64 degrees to 75 degrees during the tests, and was usually within three degrees or so at the beginning and end of each test, usually lower at the end of the test. Humidity and temperature were measured by a separate thermometer/hygrometer. During the tests, humidity measured by the separate device went up 3 times, stayed the same 1 time, and dropped 3 times. On the two nights that it dropped substantially, the outdoor temperature had dropped to near freezing overnight, resulting in much drier air outside the trailer, and our heat pump and/or furnace were operated to maintain the interior temperature on those nights. The amount of water removed during the tests varied from 75 ml to 180 ml, averaging about 130 ml, a little over half a cup. We ran the test with a separate small Vornado fan blowing at low speed on the dehumidifier from about 10 feet away. We had already found that even with the dehumidifier on the edge of our table and facing the room, it would not keep running because the fan doesn''t create enough circulation in the room, so it dehumidifies its own small area, thinks its work is done, and shuts down, only operating a small percentage of the time unless there is separate air circulation around it. The ambient humidity reported by the dehumidifier was not reliable, usually reporting much lower than the separate meter set next to the dehumidifier.
One thing that was disturbing during operation was that the power supply runs very hot, hotter than any of our other power supplies for computers or other devices. It was running at 100% duty cycle during our tests since it was only able to get the humidity down to our target on one night. We put the power supply in the open on a silicone trivet to avoid damaging the floor or table surfaces on which it was placed, and oriented it on its side so the maximum area of the power supply was exposed to radiate heat. It still remained hot to the touch after being in operation for a while. I would be worried that running at this temperature would quickly result in deterioration of the power supply or the cords where they connect into it. It needs a larger capacity power supply or one that has better heat transfer capability.
It would probably work to dehumidify a smaller enclosed space that did not have a lot of leakage of air in and out, but it should not be rated to dehumidify the amount of space reported in the product description. It certainly did remove some moisture from the air, but I think it would take a substantially more effective dehumidifier to meet our needs for our travel trailer.