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SHC Contents & Preparation

The System Health Check is a premium postal sampling service that diagnoses central heating issues with laboratory precision, enabling the correct action to be taken.

Ieva Burns·July 27, 2026

System Health Check Contents

  • A bottle for fill water;

  • A bottle for heating system water(labelled with a QR code and a unique kit reference “SHC#########” );

  • Order Form - a questionnaire to be filled out and returned with the samples.

  • Freepost Envelope.

Sample preparation

  • Fill the first bottle with Fill Water, typically from a kitchen tap.

  • Fill the second bottle with water from the heating system.

  • Ensure both are securely sealed to avoid spillage.

Post Preparation

  • Complete the Order Form.

  • Put the samples and the Order Form inside the Freepost envelope included in the test kit.

  • Post your sample via a Post Office or any post box.

Do I need to submit my System Health Check on the Fernox App?

The System Health Check is fully paper-based and doesn’t require app submission; results are emailed and can also be accessed in the Fernox App.

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