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AlorAir Sentinel HD55S
AlorAir · Sentinel

AlorAir Sentinel HD55S

Model Sentinel HD55S

SCORE7.0 / 10

The crawl space unit for spaces that run cold: it keeps working down to 33.8°F and costs a fraction of a Santa Fe or AprilAire. Size it by 36.33 pints, not the 120 on the box, and buy from an authorized seller so the warranty holds.

Specs

SpecAlorAir Sentinel HD55S
Capacity (DOE 65°F)36.33 pt/day
Capacity (old 80°F test)55 pt/day
Efficiency (IEF)2.08 L/kWh
Lowest operating temp33.8°F
Built-in pumpNo
Noise (maker figure)50 dBA
TypeCrawl space
Warranty6 yr
ENERGY STARYes
Box ratings55 pints/day at 80°F/60% RH; 120 at 90°F/90% RH saturation
Operating range33.8-104°F, 36-90% RH, auto defrost
NoiseUnder 50 dBA on the product page, under 52 on the spec sheet; lower figure shown above
DrainGravity only; at least 1 in of fall per 10 ft
Electrical115 V / 60 Hz, 4.1 A
Airflow130 CFM
FilterMERV-1
Size and weight19.2 x 12.2 x 13.3 in; 44 lb
Coverage (maker claim)Up to 1,300 sq ft
Warranty6-year limited for orders from Apr 14, 2026: 2 years full, then refrigeration parts only. A unit sent in for inspection ships at your cost after 6 months, there's no in-home service, and coverage requires purchase from AlorAir or an authorized dealer.

Sources: ENERGY STAR certified dehumidifier data · AlorAir spec sheets · AlorAir Sentinel user manual (Dec 2024) · AlorAir warranty page

Before you buy

  • Three units share the HD55 name: the original HD55 (R410A), the HD55S (R32, ENERGY STAR, gravity drain) and the HD55P (built-in pump).
  • AlorAir's own Dec 2025 sheet prints 34.53 pints labeled 60°F/60% RH; the DOE test is 65°F, so use ENERGY STAR's 36.33.
  • The ENERGY STAR listing names the HD55S and HDi65S, not the Wi-Fi HD55S, and an older Wi-Fi spec sheet still says R410A.
  • 6-year limited for orders from Apr 14, 2026: 2 years full, then refrigeration parts only. A unit sent in for inspection ships at your cost after 6 months, there's no in-home service, and coverage requires purchase from AlorAir or an authorized dealer.

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