Despite initial problems, I consider the Alorair H55 (Blue) Sentinel dehumidifier to be one of the best products on the market today because of its performance. Why do I like this desiccant so much? To be honest, my previous experience with the entire dehumidifier industry has not been a happy one. In the last 10 years I have bought (and received under warranty) more than 8 dehumidifiers. I have a relatively small enclosed crawl space (1400 SF) that I have been dehumidifying using 35 liter per day household appliances. The gear I bought was made by Frigidaire, Friedrich and Hense. They are all rubbish! They are designed to fail within 12-24 months. Although one might think that with a huge selection and abundance of different manufacturers of home dehumidifiers, the quality would vary; Removing the cover from these faulty units reveals that the working components (compressor, condenser and evaporator coils) are the same and were probably made in the same factory somewhere in China. Why do they fail in such a short time? Bad design. (1) The evaporator coils work with high pressure Freon 410, with thin wall copper tubing (environmental and energy efficiency improvement), fitted with aluminum cooling fins to condense the room humidity, all fixed with carbon steel plates at the ends of the coil. . The high pressure freon environment in a thin copper tube fails within 24 months due to ant corrosion caused by dissimilar metal (aluminum, copper and carbon steel) contact in a humid environment, resulting in a corrosive voltage drop across the evaporator coil. (2) Placing the humidity sensor in direct contact with the evaporator at the top corner will result in multiple and repeated false starts of the dryer compressor. If the unit is turned off after the correct humidity level has been reached, the evaporator coil will still be wet and if it dries up, the humidity generated will send a false signal that the room humidity is too high, thus starting the unit. Worse, when moisture evaporates, the resulting water vapor is lighter than air and rises, triggering the sensor. Excessive earnings cycles. After all, it's impossible to repair blocks when they fail. They are intended for product recycling. When I got them from the landfill (as hazardous waste), I was shocked at how many defective dehumidifiers were being dumped in the landfill together. Most creep air dryers are too powerful for my needs (100-200 pints a day). The Alorair HD55 is one of the most compact dehumidifiers on the market. And it's a quality design. This unit has a plated coil (where aluminum fins and copper tubing are plated) and is held together by stainless steel plates that protect against premature evaporator coil failure due to ant corrosion. Second, the humidifier sensor is separate from the evaporator coil and is located on the bottom of the unit to minimize triggering when moisture evaporates from the evaporator coil. In addition, an optional remote sensor with 25ft cable is available that allows the sensor to be completely isolated from the evaporator coil. The device is equipped with a removable MERV 8 filter to keep the coils clean. Very quiet in operation. You can only tell if the device works in the basement by putting your ear to the floor, as the sound is too weak. Also, I recommend the pendulum block when installing. The cable system minimizes vibration transfer and raises the unit to gain more height when the gravity drain tube is lowered. In addition, the operation of the device directly under the floor joists is more effective in the event of rising damp, and during operation it can be removed more efficiently than when the device is located in a basement or basement. Another plus is that while the humidity sensor is accurate to within 5%, the actual humidity setting can be adjusted in 1% increments. I have a separate hygrometer sensor in my basement that measures humidity in 1% intervals. This unit can maintain a constant humidity of 41% with only 1% +/- change when using the remote control and can maintain a constant 40% humidity with no change when using the sensor on the unit. None of the other junk units I've had have been able to maintain a consistent humidity level as they have +/- 5% fluctuations when set to 45%. Yes, I had some issues as the first unit shipped broke down almost immediately. It is not clear if the block was defective or if it was damaged in transit. I suspect shipping damage is a common problem. The support staff were very responsive and arranged for a replacement unit to be shipped to me within two days. I also received a return label to send the defective device back free of charge. The replacement block works great. I strongly recommend that you save the shipping carton for future returns. Nevertheless, I recommend this machine.
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