Find the right dehumidifier capacity for your space in under 60 seconds. Our calculator uses AHAM guidelines combined with IICRC S500 restoration standards.
Enter the length, width, and ceiling height of your space
Select the condition that best describes your space
Where will the dehumidifier be used?
What's the typical temperature in the space?
Dehumidifier Sizing Tips
Size Up for Tough Conditions
For water damage or extremely humid climates, choose a unit 20-30% larger than calculated for faster drying.
LGR vs Conventional
LGR (Low Grain Refrigerant) dehumidifiers are more efficient and can achieve lower humidity levels. Best for restoration work.
Consider Multiple Units
For spaces over 2,500 sq ft, multiple smaller units often work better than one large unit for better air circulation.
Drainage Options
For continuous operation, choose a unit with gravity drain or condensate pump for hands-free moisture removal.
How We Calculate
Our calculator uses AHAM guidelines combined with IICRC S500 restoration standards. Base capacity is determined by square footage, then adjusted for humidity severity (+25-50%), space type factors, and ceiling height.
Need Help Choosing?
Our team has real restoration experience. Call us for personalized recommendations.