---
title: "SHC Contents & Preparation"
description: "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."
url: https://help.fernox.app/en/articles/123-shc-contents-and-preparation
collection: "System Health Check"
updated: 2026-10-02
language: en
alternates: [es, de, cs, pl, fr-be, nl-be, fr, nl, ro, tr, sk, sv]
---

# 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.

### 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.

](https://help.fernox.app/en/articles/11-do-i-need-to-submit-my-system-health-check-on-the-fernox-app.md)