Name: AlorAir Sentinel HD55S
Brand: AlorAir
Price: 486.49 USD

3.2/5#3 of 10 in whole-home dehumidifiers
3.2

For DIYers drying a crawlspace or small basement with a floor drain who want a proven unit for a few hundred dollars.

Price checked October 22, 2026. As an Amazon Associate we earn from qualifying purchases.

Pros

Costs a fraction of a ducted whole-home unit and still protects a typical crawlspace
Runs down to about 34 F with auto defrost, so it keeps working in cold crawlspaces
Restarts on its own after a power outage
Light 44 lb unit with handles is easy to get through a crawlspace hatch

Cons

How it scores

The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.

Specifications

Performance
Model number	Sentinel HD55S
Capacity (2019 DOE)	36.3 pints/day
Efficiency (IEF)	2.1 L/kWh
ENERGY STAR	Yes
Energy use	379 kWh/year
Coverage (maker)	1,300 sq ft
Lowest operating temperature	33.8 °F
Noise	52 dB
Drainage and controls
Built-in pump	No
Drain hose outlet	Yes
Wi-Fi app	No
Auto restart after power cut	Yes
Auto defrost	Yes
Build
Type	Whole-home
Refrigerant	R-32
Dimensions	13.3 x 12.2 x 19.2 in
Weight	44 lb
Wheels	No
Warranty	2 years
Sealed-system warranty	6 years

For crawlspaces or basements without a floor drain where the water has to be pumped out; otherwise the cheaper HD55S does the same job.

$566.75

For homeowners who want one quiet, efficient dehumidifier tied into the ductwork for a mid-size house; best with a pro install to keep the warranty.

$1,779.99

For big or very humid houses where a single ducted unit has to keep up all summer; overkill for an average home.

$2,500