Easy Gas Engineer

Build 2026-08-12

Please read and accept the following before using these tools:

Data Privacy: All information entered in any of these tools remains solely on your device and is not sent to any server or third party. Auto-save uses your browser's local storage. Nothing is shared unless you choose to send a saved PDF yourself.

Gas Safe Competence & Disclaimer: These tools are provided as an aid to assist competent persons in producing records, calculations, and notices for domestic gas installations. They do not replace professional judgement or formal certification. I confirm that I am Gas Safe registered, competent for the category of work being undertaken, and responsible for verifying all calculations and ensuring all work is carried out in accordance with the Gas Safety (Installation and Use) Regulations 1998 (as amended) and all other applicable legislation and standards. To the fullest extent permitted by law, the author accepts no liability for any error, omission, or any direct or indirect loss or damage arising from use of these tools or reliance on their output.

Copyright: © 2026 Stephen J. Denney. App design, code, and original content all rights reserved. Incorporates material from Gas Installation Technology, 3rd Edition by Andrew S. Burcham, Stephen J. Denney, and Roy D. Treloar, © John Wiley & Sons, Ltd. Provided as a teaching resource for Gas Safe registered engineers. Not for reproduction, redistribution, or public use without written permission. Engineers must verify all values and procedures against current standards and manufacturer instructions.

Gas Service Checklist

Service & Maintenance Record

Easy Gas Engineer — Build 2026-08-12

Gas Installer Details ▼

Name

Gas Safe Reg. No

Address

Client Details ▼

Name

Address

Appliance & Flue Type ▼

Identify the appliance and flue type before recording data badge details. The appliance type is used to set the CO/CO₂ ratio action level in the combustion analysis section below.

Appliance Type

Flue Type

Appliance Data Badge ▼

Model / Serial No

Gas Type

Heat Input Max (kW)

Heat Input Min (kW)

Burner Pressure Range (mbar)

Gas Council No

Max gas rate (m³/h)

Measured Performance ▼

Record the values measured during the service. The tolerance check compares the calculated heat input against the maximum heat input from the Appliance Data Badge above.

Need to calculate the heat input from a measured gas rate? Use the Gas Rate tool from the home menu, then return here to record the result.

Gas rate measured (m³/h)

Gas type

Calculated heat input (kW)

Inlet pressure (mbar)

Burner pressure (mbar) — where applicable

Service Checklist ▼

Combustion Performance ▼

Flue integrity test (case seal / RS flue air intake)

PassFailN/A

Pass criteria for room-sealed (RS) appliances at the flue/case seal test point: O₂ ≥ 20.6% and CO₂ < 0.2%. Mark N/A for open-flued (OF) and flueless (FL) appliances.

Note: Always check manufacturer's instructions for specific CO/CO₂ limits — they may differ from the action levels shown here.

At maximum rate

CO (ppm)

CO₂ (%)

CO/CO₂ Ratio

At minimum rate

CO (ppm)

CO₂ (%)

CO/CO₂ Ratio

Recommendations ▼

Safe for continued use?

Recommendations / Notes

Declaration & Sign-off ▼

Date

Next Service Due Date

Installer's Signature

Sign above

Customer's Signature

Sign above

Photos ▼

Add Photo

Disclaimer: This tool is provided as an aid to help competent persons record the results of a gas appliance service check. It does not constitute engineering certification, replace professional judgement, or guarantee compliance. Users must be Gas Safe registered and competent for the categories of work being undertaken. Users are solely responsible for the accuracy of all entries and for issuing a valid service record in accordance with the Gas Safety (Installation and Use) Regulations 1998 (as amended) and all other applicable legislation and standards. To the fullest extent permitted by law, the author accepts no liability for any error, omission, or any direct or indirect loss or damage arising from use of this tool or reliance on its output.

© 2026 Stephen J. Denney (app design and original content). Incorporates material from Gas Installation Technology, 3rd Edition (Burcham, Denney, Treloar), © John Wiley & Sons, Ltd. For use by Gas Safe registered engineers. Not for public distribution.

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