Sizing matters
- Up to 1,500 sq ft crawl — Aprilaire 1830 or Santa Fe Compact70. ~60 pint/day capacity. $1,800–$2,200 installed.
- 1,500–2,500 sq ft crawl — Aprilaire 1850 or Santa Fe Advance100. ~95 pint/day. $2,400–$2,800 installed.
- Larger or unusually wet crawls — multiple units or a Santa Fe Ultra155. $2,800–$3,400 installed.
Why these specific models
Aprilaire and Santa Fe both manufacture units designed for crawl-space duty — proper filtration, condensate-pump compatible, automatic defrost, low-temperature operation. Consumer dehumidifiers from big-box stores fail in 12–24 months when run continuously in a crawl; the equipment isn't designed for it.
What's included
- Unit mounted on a hung platform off the floor (never directly on dirt or liner)
- Continuous condensate routing — to sump basin or condensate pump
- Dedicated 120V circuit + breaker (electrical permit included)
- Initial humidity setpoint tuned to your home's specific conditions
- 30-day follow-up to verify RH holding under 55%