Garages are not always climate controlled. They open to outside air, store vehicles, and experience large temperature swings. That affects humidity levels and sizing decisions.
For the full sizing framework, start with How Big of a Dehumidifier Do I Need for My Home?
Why Garages Fluctuate
Garages typically:
- Exchange outside air frequently
- Heat up during the day and cool at night
- Experience humidity spikes during rain
These shifts can raise relative humidity even if the space does not feel obviously damp. If unsure, measure first by reading How Do I Measure Relative Humidity (RH) in My House?
Typical Garage Size Guidance
In most homes:
- Single-car or small garage
→ Small: 30–40 pint - Standard two-car garage
→ Medium: 40–50 pint - Large workshop-style or humid climate garage
→ Large: 50–70 pint
If you store tools, paper goods, or electronics, moving toward the middle or upper size range is often prudent.
Related Reading
Practical Recommendation
For a typical two-car garage with seasonal humidity, a 40–50 pint unit is generally appropriate. If humidity remains above 60% for extended periods, 50–70 pints may provide more stable control.
Portable Dehumidifier Size Options
Small Dehumidifiers (30–40 pint)
Medium Dehumidifiers (40–50 pint)
Large Dehumidifiers (50–70 pint)
Conclusion
Garage sizing depends on exposure and moisture load. Choose based on measured humidity rather than guesswork. For the complete sizing logic, return to How Big of a Dehumidifier Do I Need for My Home?