AlorAir
Model comparison
Sentinel HD90 vs Sentinel HDi90
A source-backed comparison of the AlorAir Sentinel HD90 and Sentinel HDi90, focusing on verified specifications, pump configuration, drainage setup, and manufacturer-reported capacity claims without declaring a universal winner.
Verified side-by-side specs
AlorAir
Sentinel HDi90
Capacity and coverage values are manufacturer-reported specifications. Manufacturer maximum coverage is not a DrySpace sizing recommendation.
Maximum/saturation removal
Sentinel HD90
198 pints/day
Sentinel HDi90
198 pints/day
AHAM removal
Sentinel HD90
90 pints/day
Sentinel HDi90
90 pints/day
Airflow
Sentinel HD90
210 CFM
Sentinel HDi90
210 CFM
Manufacturer-reported maximum coverage
Sentinel HD90
2,600 sq ft
Sentinel HDi90
2,600 sq ft
Built-in pump
Sentinel HD90
No
Sentinel HDi90
Yes
Drainage
Sentinel HD90
Gravity drainage
Sentinel HDi90
Built-in condensate pump
Drain hose
Sentinel HD90
1.3 ft
Sentinel HDi90
Not verified
Operating temperature
Sentinel HD90
33.8-104 F
Sentinel HDi90
33.8-104 F
Dimensions
Sentinel HD90
23.2" L x 15.2" W x 17.7" H
Sentinel HDi90
23.2" L x 15.2" W x 17.7" H
Filter
Sentinel HD90
MERV-1; optional MERV-8
Sentinel HDi90
MERV-1; optional MERV-8
Weight
Sentinel HD90
67.2 lb
Sentinel HDi90
70.5 lb
Voltage
Sentinel HD90
Not verified
Sentinel HDi90
Not verified
Energy Star
Sentinel HD90
Not verified
Sentinel HDi90
Not verified
Integrated Energy Factor
Sentinel HD90
Not verified
Sentinel HDi90
Not verified
Warranty
Sentinel HD90
Not verified
Sentinel HDi90
6-year limited; first 2 years full coverage
Key differences
Built-in pump
Sentinel HD90
No
Sentinel HDi90
Yes
Drainage
Sentinel HD90
Gravity drainage
Sentinel HDi90
Built-in condensate pump
Weight
Sentinel HD90
67.2 lb
Sentinel HDi90
70.5 lb
Drainage and pump configuration
Sentinel HD90
- Built-in pump
- No
- Drainage
- Gravity drainage
- Drain hose
- 1.3 ft
Sentinel HDi90
- Built-in pump
- Yes
- Drainage
- Built-in condensate pump
- Drain hose
- Not verified
Which configuration may make more sense?
Buyers who need condensate pumped upward or away from the unit may prefer Sentinel HDi90. Buyers with a suitable nearby gravity drain may not need a built-in pump and may consider Sentinel HD90.
The practical choice depends on the installation location, hose route, discharge point, and whether gravity can reliably carry condensate away from the crawl space.
Maximum PPD vs AHAM PPD
Maximum or saturation PPD reflects moisture removal in very humid test conditions. AHAM PPD is a more standardized moderate-condition rating. Both numbers help describe performance, but higher maximum PPD alone does not determine which unit is the better fit for a specific crawl space.