Built by Air Quality Professionals · For Air Quality Professionals

Air quality modeling
that speaks your language

Name: ChemVent→IAQ
Availability: PreOrder
Author: AeroLogic Labs

AeroLogic Labs builds air quality modeling software that combines ambient air dispersion modeling with indoor air quality modeling. No compromises, no black boxes — just rigorous science using EPA-approved models in tools you can trust on the job.

Current Offering

ChemVent→IAQ

EPA SCREEN3 & AERMOD dispersion modeling with HVAC infiltration analysis and health threshold assessment — 75+ chemicals, regulatory-ready reports.

Explore ChemVent→IAQ → Request Early Access

Uses EPA models & standards EPA SCREEN3 EPA AERMOD v24142 OSHA PEL NIOSH REL ACGIH TLV TCEQ ESL

Our Philosophy

We work in the field.
We build the tools.

Most air quality software is built by developers who have never stared at an AERMOD output file or wrestled with AERMET meteorological data. We have. Every feature in our software was born from a real modeling challenge faced in the field.

That means the workflows make sense, the terminology is correct, and the science is never hidden behind a simplified UI. You always know exactly what the model is doing — and why.

🎯

Domain expertise first

Built on deep knowledge of EPA dispersion models, occupational health standards, and HVAC science — not approximations.

🔬

Transparent science

Every equation, coefficient, and model assumption is documented and accessible. No black boxes — ever.

⚡

Workflows that make sense

Designed around how you actually work — from source characterization through final report — not around how software engineers think you work.

The Problem We Solve

Outdoor and indoor air quality.
Finally, one tool.

Today's air quality professionals are forced to stitch together multiple disconnected tools — EPA's AERMOD for outdoor dispersion, NIST's CONTAM for indoor multizone modeling, and spreadsheets for everything in between. There is no single software that takes you from ambient outdoor emissions all the way through to indoor exposure in one integrated workflow. Until now.

Existing tools

Fragmented workflow

AERMOD — outdoor only
CONTAM — indoor only
IAQX — no dispersion link
Manual data transfer
No health threshold integration

ChemVent→IAQ

End-to-end in one tool

Outdoor dispersion (SCREEN3/AERMOD)
HVAC infiltration pathway
Indoor concentration modeling
Health threshold comparison
Single integrated report

Where it matters

Critical environments

Clean rooms & labs
Hospitals & healthcare
Industrial facilities
Residential buildings
Mission-critical operations

Applications

Where indoor air quality is mission-critical

🧪

Clean Rooms

Pharmaceutical, semiconductor, and biotech facilities where particle and chemical contamination must be quantified and controlled.

🏥

Healthcare Facilities

Hospitals, surgical suites, and labs where outdoor chemical infiltration can compromise patient safety and sterile environments.

🏭

Industrial Facilities

Process plants, storage areas, and warehouses where chemical spills or emissions create indoor exposure risks for workers.

🏠

Residential Buildings

Homes near industrial sites, highways, or contaminated land where outdoor air quality directly affects occupant health.

Workflow

From chemical source to risk report

Define the source

Select a chemical from the built-in database or enter custom properties. Input pool area, temperature, wind speed, and containment factors.

Model dispersion

Run EPA SCREEN3 for rapid worst-case screening, or full AERMOD with real meteorological data for regulatory-grade results.

Assess HVAC infiltration

Calculate indoor concentrations accounting for air exchange rate, fresh air percentage, particle filter efficiency, and building volume.

Export the report

Generate a multi-sheet Excel report with Health Quotient tables, outdoor/indoor summaries, and comparison charts across all averaging periods.

Features

Built for professional exposure assessment

Every feature was built around a real workflow challenge faced by industrial hygienists and environmental consultants.

🌬️

EPA SCREEN3 Dispersion

Gaussian plume modeling with rural/urban terrain options, Pasquill-Gifford stability classes, worst-case sensitivity sweeps across 6 stability × wind combinations.

🗺️

Full AERMOD Integration

Complete AERMET/AERMAP/AERSURFACE pipeline with NOAA meteorological data downloads, USGS 3DEP terrain, NLCD 2021 land-use, and interactive map visualization.

💧

Pool Evaporation Model

EPA Equation 3-24 mass transfer approach — accounts for pool area, storage temperature, wind speed, containment efficiency, and molecular diffusivity corrections.

🏢

HVAC Infiltration Analysis

Steady-state indoor mass balance with air intake height effects, MERV 4–16 and HEPA filter efficiency curves, ACH calculations, and fresh air percentage modeling.

⚠️

Health Quotient Assessment

Automated HQ = Predicted ÷ Threshold calculations against IDLH, OSHA PEL, NIOSH REL, ACGIH TLV-TWA, and TCEQ ESL standards. Color-coded risk flagging.

📊

6 Integrated Analysis Charts

Temperature sensitivity, concentration profiles, indoor vs. outdoor comparison, pool area scaling, air intake height effects, and filter/ACH sensitivity — all in one view.

📁

Excel Report Export

Multi-sheet Excel workbook with outdoor summary, indoor summary, and detailed threshold analysis tables — ready to attach to regulatory submissions.

🔌

Auto-Fetch External Data

Pulls meteorological data from NOAA ISD and RAOBS, terrain from USGS 3DEP, and land-use from NLCD 2021 GeoServer — no manual downloads required.

🔒

Fully Local & Private

All calculations run on your Mac. No cloud processing, no data uploads, no account required. Your client data stays on your machine.

Screenshots

See it in action

Every screen is purpose-built for the job — no generic UI, no compromises. From chemical input to regulatory report in one integrated workflow.

ChemVent→IAQ — Chemical & Source Configuration

Chemical & Source Configuration

Select from 75+ chemicals or enter custom properties. Configure pool dimensions, temperature, containment factor, wind speed, and release geometry — all physical parameters needed for the dispersion models in one screen.

Input 75+ Chemicals

Chemical Database

75+ chemicals. Zero manual lookups.

Every chemical includes Antoine equation coefficients for temperature-dependent vapor pressure, molecular weight, diffusivity, and full health threshold data from IDLH to TCEQ ESL.

Benzene

Toluene

Xylene

Formaldehyde

Acetone

Ammonia

Hydrogen Sulfide

Sulfur Dioxide

Acrylonitrile

Vinyl Chloride

TCE (Trichloroethylene)

Methanol

Ethanol

Isopropanol

Portland Cement

Silica Dust

Coal Dust

Fly Ash

Chloroform

Carbon Tetrachloride

+ 55 more industrial chemicals · Custom chemical entry with JSON sidecar storage

Use Cases

Who uses ChemVent→IAQ

🏭

Industrial Hygienists

Quantify worker chemical exposure from storage facilities, process areas, and spill events. Compare predicted concentrations against OSHA PEL and ACGIH TLV standards with Health Quotient scoring.

Exposure Assessment OSHA Compliance Risk Quantification

🌱

Environmental Consultants

Model chemical dispersion from spill sites and contaminated areas. Generate regulatory-grade AERMOD outputs for EPA/state agency submissions with full meteorological and terrain analysis.

AERMOD Modeling Regulatory Reporting Spill Response

⚗️

Chemical & Petrochemical Facilities

Evaluate storage facility design, process safety scenarios, and emergency release planning. Model worst-case and realistic scenarios across multiple chemicals and meteorological conditions.

Process Safety Emergency Planning HVAC Design

🏥

Occupational Health Practitioners

Support medical surveillance programs with quantitative exposure characterization. Identify at-risk worker populations and document exposure scenarios for health outcome studies.

Medical Surveillance Exposure Documentation NIOSH Standards

Air quality modeling
that speaks your language

We work in the field.
We build the tools.

Outdoor and indoor air quality.
Finally, one tool.

Where indoor air quality is mission-critical

ChemVent→IAQ

From chemical source to risk report

Built for professional exposure assessment

See it in action

75+ chemicals. Zero manual lookups.

Who uses ChemVent→IAQ

Health thresholds built in

Request early access

Air quality modelingthat speaks your language

We work in the field.We build the tools.

Outdoor and indoor air quality.Finally, one tool.

Where indoor air quality is mission-critical

ChemVent→IAQ

From chemical source to risk report

Built for professional exposure assessment

See it in action

75+ chemicals. Zero manual lookups.

Who uses ChemVent→IAQ

Health thresholds built in

Request early access

Air quality modeling
that speaks your language

We work in the field.
We build the tools.

Outdoor and indoor air quality.
Finally, one tool.