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AirPermitHub

Emissions toolkit

Emission Calculators

Equipment-based calculations that show the formula, the emission factor, its source, and every intermediate step. Nothing is hidden.

Choose equipment

Transparent by design

Every result shows its formula, inputs, emission factor, and each intermediate step, so a reviewer can reproduce it by hand.

You cite the factor

AirPermitHub does not ship unverified emission factors. Enter the factor and its reference; results without a cited source are flagged.

Versioned factor library

Phase 2 adds a factor database where every value carries its publication, revision date, URL, and version history.

Emission factor record

Every factor in the upcoming library will store:

  • Source category
  • Pollutant
  • Factor value
  • Units
  • Reference document
  • Section / table
  • Publication or revision date
  • Official URL
  • Rating / quality
  • Notes
  • Version history

Supported pollutants

Results report lb/hr, lb/day, and tons/yr. CO2e is computed from the GWP you enter.

  • NOx
  • CO
  • VOC
  • PM
  • PM10
  • PM2.5
  • SO2
  • HAPs
  • CO2
  • CH4
  • N2O
  • CO2e

AirPermitHub provides educational, engineering, research, and compliance-support information. Information provided by the platform does not constitute legal advice and should not replace review of applicable regulations, permits, agency guidance, or consultation with qualified professionals. Full disclaimer