Ventilation and IAQ Calculator
Optimize air quality and ventilation for healthier indoor environments
Input Parameters
Space Dimensions
m
m
m
m
Occupancy
Building & System
Higher MERV ratings provide better filtration of small particles
Environmental Conditions
°C
50%
Standards Compliance
Quick Reference
ASHRAE Standards:
- ASHRAE 62.1: Ventilation for commercial buildings
- ASHRAE 62.2: Ventilation for residential buildings
Minimum Fresh Air:
- Office spaces: 5-10 L/s per person
- Classrooms: 5-8 L/s per person
- Residential: 2.5-5 L/s per person + 0.3 L/s per m²
Recommended IAQ Values:
- CO₂ concentration: < 1000 ppm
- Relative humidity: 30-60%
- TVOC: < 500 μg/m³
- PM2.5: < 12 μg/m³ (annual average)
Ventilation Summary
ASHRAE 62.1 CompliantRequired Ventilation
Outdoor Air Rate
425 L/s
Air Changes per Hour
2.8 ACH
Per Person Rate
42.5 L/s
Per Area Rate
1.42 L/s/m²
Indoor Air Quality Assessment
Overall IAQ Score: 85/100
Good
CO₂ Concentration
650 ppm
Recommended: < 1000 ppm
PM2.5 Level
8.3 μg/m³
Recommended: < 12 μg/m³
TVOC Level
315 μg/m³
Recommended: < 500 μg/m³
Space Information
Room Volume
900 m³
Floor Area
300 m²
Occupant Density
30 m²/person
Filtration Efficiency
85%
Project Details
Project Name
Office Building Ventilation Assessment
Project Number
VENT-2023-052
Location
Chicago, IL
Date
May 27, 2023
Notes
Ventilation assessment conducted for the 3rd floor open office space. Calculations based on ASHRAE 62.1-2019 standard.