Business Ventilation Rate

What is Air Exchange Rate (ACH)?

Air Exchange Rate (ACH) is the number of times the air in a room is fully replaced with fresh air each hour. It is the standard measure of ventilation effectiveness: a higher ACH generally means better indoor air quality and lower accumulation of pollutants, CO₂, and airborne pathogens. ACH is calculated from the room's volume and the airflow rate of the ventilation system serving it.

Built for facility mangers

Save time

→ Get a quick overview of your entire portfolio from anywhere

→ Prioritize worst-performing spaces first

→ Generate compliance reports in minutes, not hours

Stay ahead of problems

→ Real-time alerts when conditions exceed thresholds

→ Use trend data to predict and prevent issues

→ Fix problems before they become complaints

Seamless integration

→ Connect to your BMS for automated HVAC optimization
→ Receive alerts in Slack, Teams, or email
→ API access for custom dashboards and analytics

Easy to deploy and maintain

→ Fully wireless sensors, no complex cabling
→ Long battery life means minimal maintenance
→ Scale easily as your portfolio grows

Air Exchange Rate (ACH)

Understand how often the air in a room is replaced with fresh air, expressed as air changes per hour.

Track ventilation

Check whether a building's ventilation system is operating correctly, or if it needs adjustment.

Correlate with other insights

Compare Air Exchange Rate alongside other dashboard metrics, so ventilation decisions are based on the full picture.

Improve indoor air quality

Higher air exchange rates mean better ventilation and lower risk of airborne virus spread, CO₂ buildup, and pollutant accumulation. Track changes to confirm whether your adjustments actually improve the air.

Drive energy efficiency

Use real occupancy and CO₂ data to identify under- or over-ventilation. Adjust ventilation schedules to actual usage instead of fixed office hours, cutting waste without cutting comfort.