Environmental Compliance, Waste & Water Management worked example

Air Permit Throughput at 68% control device uptime or capture factor: a worked example

Suppose control device uptime or capture factor falls to 68%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Calculate air permit throughput from permitted or actual emissions, source operating hours, and an effectiveness percentage.

The inputs for this scenario

  • Permitted or actual emissions: 18 tons (held at the documented default)
  • Source operating hours: 4,200 hr (held at the documented default)
  • Control device uptime or capture factor: 68 % (the input this scenario stresses; the baseline uses 95)

Working through the calculation

  • The calculation starts from the formula this tool documents: Raw rate = permitted or actual emissions ÷ source operating hours.
  • Air Permit Throughput works out to 0 tons/hr at these inputs, and this is the headline figure for the scenario.
  • Raw air permit throughput works out to 0 tons/hr at these inputs.
  • Control uptime or capture factor works out to 68 % at these inputs.
  • Source operating hours works out to 4,200 hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where control device uptime or capture factor sits at 95% and the headline result is 0 tons/hr, this scenario comes in 28.42% below the baseline at 0 tons/hr.
  • It computes a controlled hourly emission rate — total emissions divided by operating hours, then multiplied by the control device uptime or capture factor — in tons per hour. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Air Permit Throughput: 0 tons/hr (headline result)
  • Raw air permit throughput: 0 tons/hr
  • Control uptime or capture factor: 68 %
  • Source operating hours: 4,200 hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Air Permit Throughput calculator, set control device uptime or capture factor to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.