RV Dehumidifiers
The best RV dehumidifier depends on how you camp: a compact compressor unit of about 20 pints for full-time living or humid climates, or a small thermoelectric unit for light dampness in a parked trailer. Condensation on windows each morning means moisture is building up.
What to compare
- Daily removal: cooking, showers and breathing add a lot of moisture in a small space.
- Power draw: compact compressor units often draw a few hundred watts. Mini units draw far less.
- Size and weight: measure the floor or counter space, and secure the unit while driving.
- Drainage: a hose to the shower or sink drain avoids emptying a small tank.
- Low temperature: winter camping calls for auto-defrost or a desiccant unit.
- Vents: run roof vent fans and crack a window when cooking.
For other tight spaces, see Small Dehumidifiers. To track humidity on the road, a simple hygrometer helps.
FAQs
Do I need a dehumidifier in my RV?
If you see condensation on windows, musty smells, or damp bedding, yes. Small RVs trap moisture from breathing, cooking and showers, especially in cool or humid weather. Ventilation with roof fans helps, but a dehumidifier keeps humidity lower when windows stay closed overnight or during storage.
What size dehumidifier for a camper?
For full-time living or humid climates, a compact compressor unit in the 20- to 22-pint class is usually enough for most RVs. For a stored or lightly used camper, a thermoelectric mini or rechargeable desiccant canister may handle light moisture. Check the unit's power draw against your electrical setup.
Can I run a dehumidifier on RV battery power?
Small thermoelectric units draw little power and may run on an inverter for a while. Compressor dehumidifiers draw a few hundred watts and drain batteries quickly, so they are best used on shore power or a generator. Check the wattage and your battery and inverter capacity first.