Sustainability Report 2016 / 2017

➲ Process and Heating Energy (steam and district heating) In the past Werner & Mertz – Mainz used steam generated by its own boiler building as process energy to heat raw materials and input materials and, until the end of 2011, to heat buildings. In a series of steps the heating of production buildings, warehouses and heat chambers was converted to district heating. Since the end of 2010, efficient high-speed steam generators have produced proc­ ess steam. Only the heating of processing tanks for some products accounts for the annual natural gas consumption. When we take degree days into account (i.e., adjust for outside temperature), we can see changes in consumption (shown below). Among other things, the activation of heat recovery from the new ventilation facilities in the laboratory building at the beginning of 2015 compensated for the relative consumption increase of the prior year. 46 Fuel consumption (kWh)/ filling amount (kg) Fuel consumption (kWh)/ filling amount (piece) Fuel Consumption (Process and Heating Energy) per Filling Amount 0.10 0.05 0.00 2012 2013 2014 2015 0.071 0.067 0.081 0.076 0.083 0.079 0.067 0.067 Fuel consumption process and heating energy (kWh)/filling amount (kg) + degree (degree days) Fuel consumption process and heating energy (kWh)/filling amount (piece) + degree (degree days) Fuel Consumption (Process and Heating Energy) per Filling Amount in relation to degree days 0.040 0.020 0.000 0.027 0.026 0.028 0.025 0.025 0.028 0.026 0.025 2012 2013 2014 2015 Environmental Statement · Mainz site