Size for the actual square footage and moisture load, not the biggest advertised pints/day number. Continuous drainage and low-temperature performance matter more than app features.
Capacity ratings need context
Dehumidifier capacity is usually measured under standardized warm, humid test conditions. A crawlspace can be much cooler, so real extraction can be lower than the headline pints-per-day number.
Drainage is essential
A crawlspace unit should normally drain continuously. Gravity drainage is simplest; a built-in condensate pump helps when the drain point is above the unit.
AlorAir vs Argendon
AlorAir is a specialist brand with a broad crawlspace and restoration lineup. Argendon also targets crawlspaces and commercial moisture control with premium products in the same general category.
Both can be monetized through, making comparison pages commercially useful.