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About MCS

MCS is a mark of quality and demonstrates
compliance to industry standards that companies
strive to meet. It highlights to consumers that
companies are able to consistently install or
manufacture to the highest quality every time.

MCS has published an update to the MCS biomass calculator (version 1.4). This version of the calculator is available to download here.

The HL calculator tab of the biomass calculator has been updated as follows:

-       added a new option to change the air change rate based on the age of the property (pre 2000, post 2000 and post 2006). Please ensure you select the correct age of the property.

-       added a question on whether there is an open flue present in the room

-       added a question on whether a throat restrictor is fitted to the flue

These updates have been introduced to improve the accuracy of the heat loss calculator. If you have any feedback please submit this to This email address is being protected from spambots. You need JavaScript enabled to view it..