Why is M2G required?

The inherent problem

All boilers within an estate, no matter how modern, waste heat as a consequence of standing losses and poor temperature controls.
When installed, over 80% of commercial boilers have over capacity for their application i.e. the boiler's maximum thermal output is rarely utilised.
Over capacity creates "dry cycling" i.e. boilers firing unnecessarily to recover the heat loss without contributing to "true" building load.
This results in unnecessary energy consumption and CO2 emissions across an estate.

Research: Commercial Boiler Sizing. Source - European Energy Institute

What is dry cycling?

The boiler fires to reach its set point, meeting the building's heating demands (load)
Once the set point has been reached the boiler stops firing. However, standing heat losses continue and the boiler cools down without transferring this heat to the system load
The boiler will then fire unnecessarily to recover these losses even though the building requires no heat

Radiated heat losses whilst boiler is firing and during stand by

Additional Heat Loss

The heat loss is exacerbated when the boiler enters a pre-purge before the next firing to remove any residue of combustible gases.This is effectively blowing cool air across the combustion space therefore cooling the boiler down before it begins to re-fire.

Boiler purging

Dry cycling throughout the year

Dry cycling occurs throughout the year, even if the boilers are just providing hot water generation during the summer months.

Annual profile of dry cycling

Results in continuous firing

As a result of the standing losses. Boilers will fire unnecessary to recover the standing losses resulting in wasted fuel consumption, costs and CO^₂emissions. Dry cycling can be removed by fitting M2G - intelligent boiler load optimisation to each boiler. M2G indentifies and removes dry cycling therefore reducing energy costs and CO₂ emissions.

Illustration of boiler firings with and without M2G