Filter attachment for draught regulator: Optimum conditions with reduced ash and soot discharge
Maisach, 13 March 2023 – The more expensive fuels become, the more important efficient heating becomes. At the same time, emissions are to be reduced as much as possible. Both factors can be optimised by draught regulators in the chimney. In the case of biomass heating systems, however, soot can be discharged into the installation room. The new filter attachments for draught regulators from Kutzner + Weber, a brand of the Raab Group, offer a solution for this.
To reduce emissions from heating systems and increase efficiency, it is worthwhile to start directly at the flue gas system. Only when the delivery pressure at the flue gas connection of the fireplace is stable can combustion take place in a clean, environmentally friendly and economical manner.
Draught regulators are particularly helpful for systems in negative pressure operation. These are independently operating secondary air devices according to DIN 4795. The task of the draught regulators is to prevent excessive negative pressure in the exhaust system due to weather-related temperature fluctuations. For this purpose, they react precisely to pressure changes and limit the chimney draught to the respective set value. The setting depends on the required delivery pressure of the connected boiler. As soon as the draught in the chimney exceeds the optimum value, the draught regulator control disc opens. The supplied air volume increases the volume flow and thus limits the negative pressure. This process ensures even combustion and measurable energy savings. Draught regulators function without auxiliary energy.
In biomass boilers, however, ash and soot can be discharged into the installation room via the draught regulator, especially during the start-up phase. The new filter attachments for precision tension limiters from Kutzner + Weber provide a remedy. The filter attachment can be easily fitted to new installations or existing draught regulators using plug & play. The filter attachment is simply inserted between the connection piece and the draught regulator and secured with a clamping band. The draught regulator is then refitted on the filter attachment and is ready for use. It should be noted that the air group of the draught regulators is reduced somewhat, which is usually not a major limitation with the high-performance precision draught regulators.
The filter insert consists of an open-pored, high-temperature resistant ceramic disc and can be easily cleaned with a brush under running water if necessary, for example as part of boiler maintenance and chimney cleaning.
After an operating time of about 3 years, the filter insert should be replaced with a new one. Kutzner + Weber offers suitable replacement filters.
The filter attachments are available for the Kutzner + Weber draught regulators of the series Z(UK) 130, Z(UK) 150 (S) and Z(UK) 180.
This allows efficient, low-emission heating and significantly reduces soiling of the boiler room.
