GREE AlorAir Sentinel HD90 Commercial Dehumidifier - B01LW3SOPE
Our smart auto-defrost system keeps an eye on the temperature around the unit. When it gets too cold, the dehumidifier automatically starts a defrost cycle to stop frost from building up. During this time, the compressor pauses, but the fan keeps running to melt the frost. After that, it goes back to working normally. This helps save energy and keeps the unit lasting longer.
AlorAir crawlspace dehumidifiers reduce excess moisture and protect your home. Choosing an ENERGY STAR certified model means you save on energy bills without losing out on performance or comfort, while also helping the environment by lowering greenhouse gas emissions.
The Sentinel HD90 is smaller and more compact than most traditional basement dehumidifiers. At just 23.2" deep, 15.2" wide, and 17.7" high, it’s easier to move, place, and store. It’s perfect for homes and works well in crawl spaces, basements, warehouses, offices, and industrial settings.
Features
- Energy Star Certified Dehumidifier: Quickly and efficiently removes moisture using less energy than conventional models, helping save on your energy bills. Removes 90 pints per day at AHAM conditions, 198 pints at saturation, and covers up to 2,600 sq. ft. Ideal for basements, crawl spaces, storage areas, garages, large rooms, or commercial use.
- Automatic Defrost: Features an advanced auto-defrost system with built-in sensors that monitor temperature. When it gets too cold, the unit starts an automatic defrost cycle to prevent frost buildup. During defrosting, the compressor pauses while the fan runs to melt frost. Afterward, normal operation resumes. This saves energy and prolongs the unit’s lifespan.
- Internal Corrosion Protection: Uses advanced technology to reduce corrosion and freon leakage. Typical coils are prone to corrosion from oxides, hydroxides, or sulfides in dehumidification applications. This feature protects coils, maintaining heat transfer efficiency and extending coil life.
- Designed for Energy Saving: AlorAir’s high COP dehumidifier offers long-term energy savings, potentially saving up to $250 annually on energy costs. By maintaining a consistent 50% relative humidity, there’s less need to keep your thermostat at uncomfortably low temperatures to control moisture.
Specifications
| Capacity |
198 PPD at Saturation, 90 PPD @ AHAM |
| Size For |
2600 sq.ft |
| Super COP |
2.69 L/KWh |
| Air Flow |
210 CFM / 350 CMH |
| Drain Pipe |
1.3 ft (40 cm) |
| Functioning Temperature Range |
33.8 - 104 ℉ |
| Functioning Humidity Range |
36% - 90% |
| Filter Type |
MERV-1 (Optional MERV 8) |
| Dimensions (L × W × H) |
23.2 × 15.2 × 17.7 in |
| Weight |
67.2 lbs (30.5 kg) |
| Sound Pressure Level |
58 dBA |
What our Experts Think
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Commercial‑Grade Moisture Control
Engineered for high‑capacity dehumidification — ideal for basements, warehouses, job sites or flood‑prone spaces.
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Powerful & Efficient
High CFM airflow and robust extraction keep humidity controlled fast, reducing mold, corrosion and odors.
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Durable for Heavy Use
Built‑tough construction handles frequent operation in demanding environments.
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Smart Features for Ease
Intuitive controls and auto‑restart improve reliability and usability for professionals.
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Energy‑Mindful Performance
Efficient operation balances dehumidification power with lower energy costs.
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Trusted Value
Strong performance relative to price — excellent choice for commercial and tough residential jobs.
Q&A
Q: What is the Sentinel HD90 dehumidifier?
A: A commercial-grade dehumidifier designed to remove excess moisture in basements, crawl spaces, warehouses, offices, and large indoor areas.
Q: How much moisture can it remove?
A: Removes up to 90 pints per day under standard conditions, and up to 198 pints at saturation.
Q: What size area is it suitable for?
A: Ideal for spaces up to 2,600 sq. ft., covering large residential and commercial environments.
Q: Is it energy efficient?
A: Yes — it is ENERGY STAR certified, offering high moisture removal with lower energy consumption.
Q: What features enhance durability?
A: Includes automatic defrost, corrosion-resistant coils, remote control capability, and heavy-duty construction for long-term use.
Q: How does drainage work?
A: Supports gravity drainage, with optional pump drainage on compatible setups.
Q: What are key operating specifications?
A: Approximately 210 CFM airflow, noise under 58 dBA, operating temperature range of 33.8–104 °F, and relative humidity range of 36–90%.
Q: What’s included in the box?
A: The dehumidifier unit, MERV‑1 filter, user manual, and drain hose.
Q: Who is this dehumidifier best for?
A: Perfect for commercial spaces, large basements, crawl spaces, restoration projects, storage areas, and any large enclosed space needing humidity control.
Maintenance Tips
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Unplug unit before any maintenance or cleaning.
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Wipe exterior with a soft, damp cloth; avoid harsh chemicals.
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Remove and clean air filter regularly; ensure it’s fully dry before reinstalling.
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Clean coils annually with approved coil cleaner to maintain efficiency.
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Keep inlet and discharge areas clear for proper airflow.
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Place unit on a level surface with adequate space around it.
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Avoid blocking vents or placing unit against walls.
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Check and clear the drainage path for proper water removal.
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Store in a dry location with cord secured when not in use.
