Online Gas Calculations:

There are three separate online calculators available.

Number 1: Heat Inputs, gas rate sheets, Ventilation, Combustion Analysis and Purging (This purge calculator will not be in use after October 2026).

Number 2: 🆕 2026 Purging and Leakage Rate Calculator. This will be mandatory in October 2026.

Number 3: Domestic Pipe Sizing Calculator for Natural Gas, LPG, Butane in Copper, Steel or PE Pipe