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Heat Load Calculator

HEAT LOAD CALCULATOR

About the MCS Heat Load Calculator

Launch the heat load calculator
installers shaking hands

About the Heat Load Calculator

The Head Load Calculator is an online tool to help MCS certified low-carbon heating installers complete a BS EN 12831-1: 2017 compliant heat load calculation, as required in the Heat Pump Design Standard (MIS 3005-D) and the Biomass Installation Standard (MIS 3004). 

Installers will be able to calculate room by room heat load calculations of a property, which is crucial for ensuring a heat pump or biomass system is sized correctly and meets the requirements of MCS Standards.  

The Heat Load Calculator is exclusively available for MCS certified installers and those who are in the process of gaining certification. The existing Excel-based tool remains available on the MCS website but will no longer be supported or updated. 

Below you will find information about the Heat Load Calculator including how it works and the ability to provide your feedback to contribute to updates in the future. 

How the Heat Load Calculator works

Installer crouched down with tools.
Installers carrying heat pump.

Launch the Heat Load Calculator

View our user guide

What's happening to the old Excel tool?

While the Excel tool has served its purpose, it has its limitations and has become outdated. It is still available to download here for those who want to use it, but it’s important to understand that it is no longer supported or updated by MCS. 

Download excel tool

Tell us what you think

Provide your feedback on the Heat Load Calculator by sending an email to feedback@mcscertified.com.

Frequently asked questions

Yesthe Head Load Calculator is free to use. 

Yes, it has guidance prompts, pop-ups, and real-time support to streamline the process for installers. There is a user guide to help you get to grips with the new Heat Load Calculator. You can view help documentation here 

No, effective from January onwards, every low-carbon heating installer in your business can have access to the Heat Load Calculator. The account for the Heat Load Calculator is set up to the business email associated with your MID account. From January, multiple accounts can then be created within the tool for each user. This will allow each individual installer within every MCS certified business to have ownership over their own calculations, separated from other users.

The new tool generates a final report that can be saved on the platform itself, as well as an option to download/export to your device. This allows installers to pull up specific heat load 
calculations when being audited or assessed.