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The AlorAir Sentinel HD90 is a commercial-grade refrigerant dehumidifier rated at 198 pints per day, built for crawl spaces, basements and other damp, enclosed areas. Its auto-defrost system watches ambient temperature and cycles the compressor off while the fan keeps running, which keeps it working in cool spaces and protects the unit. It is a ductable, hard-wired-style unit aimed at homeowners drying a whole crawl space and at contractors, not at someone wanting a portable room dehumidifier. Against smaller residential units it moves far more moisture and runs at lower temperatures; against premium crawl space brands it is a value pick, and its 4.9 rating from 94 buyers suggests strong satisfaction.
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Owners rate it very highly, with most praising how quickly it dries a damp crawl space and how well it holds up in cool weather. Complaints are few and center on weight and the need to set up drainage.
The AlorAir Sentinel HD90 is a dehumidifier made for crawl spaces and basements. It removes excess moisture from the air. It is also suitable for households, warehouses, offices and industrial facilities.
It has an auto-defrost system that uses built-in sensors to monitor the ambient temperature. When the temperature is low, the unit starts a defrost cycle to prevent frost buildup. The compressor stops during the cycle while the fan keeps running so the frost can thaw. Normal operation resumes when the cycle ends.
The unit is smaller and more compact than conventional basement dehumidifiers, which makes it easier to transport, place and store. It has a Super COP rating of 2.69 L/kWh.
