Air Balance Calculator
Calculate supply, return, outdoor air, and exhaust quantities for proper building pressurization.
Air Balance Guidelines
| Building Type | Pressurization |
|---|---|
| Office/Commercial | +0.03" to +0.05" |
| Hospital (general) | +0.01" to +0.03" |
| Clean Room | +0.05" to +0.10" |
| Laboratory (negative) | -0.03" to -0.05" |
| Kitchen | -0.02" to -0.05" |
Balance Equation
Supply = Return + Exhaust + Building Exfiltration
Outdoor Air = Exhaust + Pressurization Air
For positive pressure: Supply > (Return + Exhaust)