Verify Combustion Safety Instantly & Maintain Absolute Compliance

Stop risking compliance failures on manual decimal conversions and generic approximations. GasCalc transforms complex AS 3814 and State Regulatory requirements into a rapid, error-free digital workflow designed specifically for gloved hands in the field.

See How It Works

Demo Video Coming Soon

Core Capabilities & Calculations

Bring absolute certainty, unprecedented speed, and audit-ready documentation to every industrial and commercial gasfitting project.

Instant Stoichiometric Math

Automatically converts your analyser's parts-per-million (ppm) CO readings into precise percentages to calculate the true CO/CO₂ combustion ratio independently of excess air dilution.

Dynamic Regulatory Limits

Automatically applies the correct legislative pass/fail thresholds based on your selected appliance type, ensuring adherence to the strict compliance hierarchy where State Regulations supersede Australian Standards.

Transient Condition Allowances

Accounts for permissible transient spikes and cold start-ups in accordance with AS 1375, preventing nuisance failure readings during initial commissioning.

Audit-Ready Vector PDF Reporting

Data-Driven Compliance

Generates a complete, JSON-driven mathematical breakdown of the conversion and ratio calculation.

Instant Documentation

Outputs crisp, vector-based PDF reports directly from the field, eliminating the need for HTML-based screenshots and ensuring your commissioning documentation is perfectly formatted and immediately ready for client or regulatory submission.

How the Calculator Works

The CO/CO₂ Ratio Calculator translates your raw flue gas analyzer readings into a definitive pass/fail safety metric.

1

Select Appliance Type

Choose the type of appliance you are testing to set the baseline regulatory safety limits (e.g., Standard Flued, Direct-Fired, or VIC Residential Flueless).

2

Enter Flue Gas Readings

Input the stabilized Carbon Monoxide (CO) reading in ppm and the Carbon Dioxide (CO₂) reading as a percentage directly from your analyzer.

3

Confirm Safety Status

The app instantly calculates the ratio and cross-references it with the maximum allowed limit for the selected appliance type, providing a clear Pass/Fail result.

Legislative Framework

AS 3814:2018, Clause 3.6.1(f) & (g): Sets strict baseline combustion conditions for standard flued appliances.

AS 3814:2018, Clause 5.7.7.1(b): Establishes significantly tighter limits for combustion products in direct-fired air heaters.

AS 1375:2023, Clause 3.1.1: Dictates the permissible tolerances during transient operating conditions and initial start-ups.

State Regulations: The WA Gas Standards Regulations 1999 (Reg 32(1)) and VIC Gas Safety Regulations 2018 (Reg 13, 24(2)(d)) establish the legal hierarchy, where state laws supersede Australian Standards (e.g., Victoria's ultra-strict limits for flueless space heaters).

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