Heat of condensation
Additional heat from the flue gases. Condensation occurs when the flue gases cool, resulting in the release of additional energy. This additional potential – based on the Lower heating value – is about 11 percent for natural gas, 9 percent for LPG, and 7 percent for fuel oil.
Equipment which transfers the heat of combustion to the Heating circuit water. The latest generation of Weishaupt boilers reduce energy losses to a minimum by means of efficient heat exchangers and excellent heat insulation.
The Boiler temperature is adjusted relative to the outdoor temperature by means of the heating (or temperature) curve. A low outdoor temperature results in a high Boiler temperature. The setting-up of the Heating curve is very important for efficient heating, and is carefully checked during maintenance.
Higher heating value
The amount of heat released through the complete combustion of a cubic metre of gas (at standard temperature and pressure) or a kilogram of fuel oil, when the water produced by the combustion is liquid. It is measured in kWh/m<sup>3</sup> or kWh/kg. It is abbreviated to HHV or GCV (gross calorific value).