Carbon Trust on Micro-CHP Executive summary Micro-CHP is an emerging set of technologies with the potential to provide carbon savings in both commercial and domestic environments. Combined Heat and Power (CHP) systems provide potential reductions in carbon emissions and costs by generating both heat and electricity locally with efficient use of fuel and by offsetting the use of centrally-generated electricity from the grid. 8. The domestic Micro-CHP systems monitored in the trial have the potential to provide typical carbon savings of 5% to 10% for older, larger houses with high and consistent heat demands. 9. Although current Micro-CHP systems can potentially save carbon in some smaller, newer properties, this is not always the case and any savings are likely to be insignificant.