Commercial Gas Toolkit is a professional calculation and reporting app built by a UK Gas Safe engineer, for commercial gas engineers.

Designed for real site use, the app replaces manual paperwork with fast, accurate calculations and clear professional reports — without guesswork.

🔧 Core calculation tools

• Installation Volume (IV) calculation
Accurately calculate total installation volume for commercial and industrial gas pipework.

• Strength testing calculations (guided test)
Calculate required test pressures and durations, with a guided strength test workflow to help you follow the correct testing sequence on site.

• Tightness test duration (guided test)
Calculate tightness test times quickly and consistently, with a guided tightness test that walks you through the process step-by-step.

• Purge volume and purge time calculation (guided test)
Calculate required purge volumes and purge durations, with a guided purge workflow to support safe commissioning and recommissioning.

• Gas rate calculation
Fast gas rate calculations to support appliance input verification.

• Ventilation calculation
Calculate minimum ventilation requirements for commercial boiler rooms and plant spaces.

All calculations and guided workflows have been cross-checked against traditional manual methods and verified by working commercial gas engineers.

📄 Professional PDF reports
Generate clean, consistent PDF reports directly from your calculations:

• Add your company logo

• Customise header colours to match your branding

• Clear layout suitable for clients and site records

• Share PDFs via email, WhatsApp or cloud storage

Important:
PDFs generated by this app are calculation records only.
They are not certificates and do not replace CP12, CP16, CP17 or any other statutory documentation.

🧰 Built for site work
• Guided test workflows for strength, tightness and purge
• Fast input with clear outputs
• Pass / fail logic where applicable
• Calculation history saved on device
• Works offline
• No adverts
• Designed for professional daily use on site

👷 Who this app is for
• Commercial Gas Engineers
• Industrial Gas Engineers
• Heating & Mechanical Contractors
• Engineers carrying out testing, commissioning and servicing

⚠️ Professional responsibility
This app is a calculation and guidance aid only.
Users remain responsible for:
• Correct data input
• On-site testing procedures
• Compliance with Gas Safe registration
• Adherence to current UK standards and regulations