Viessmann has played a part in the reduction of carbon emissions by the Household of the Prince of Wales and the Duchess of Cornwall. The reduction of 9% included the contribution from the installation of a carbon-neutral heating system at Highgrove. 9m2 of Viessmann Vitosol 200 vacuum-tube solar collectors supplemented the woodchip and biomass burning boiler. The system was configured by TESA (Western) Ltd and includes energy and carbon monitoring ability.