Function
Thermal flue gas dampers are used exclusively in atmospheric gas fireplaces.
In these stoves, which are open due to their design, the chimney draught continues to act even after the flame has gone out and extracts energy accordingly with the heated room air.
During this process, the heat energy stored by the combustion is also largely lost in the oven.
Thermal flue gas dampers react to the respective operating state of the burner through its heat generation; shortly after switching off, the damper closes and prevents the energy losses described above.
The flue gas damper already starts to open at approx. 40 °C and thus reacts quickly to the start-up of the fireplace. Due to the temperature-dependent mechanism, opening and closing is directly linked to switching the burner on and off.
Although this fact restricts the application to gas fireplaces of type B11, the function is ideal for this purpose. For all other fireplaces, motorised flue dampers are the right solution.
Saving energy with the thermal flue gas damper
Thermal flue dampers can save up to 4,000 kWh per year and more, depending on the system.
This means that the relatively low costs for installation pay for themselves after only a short time. Due to the high life expectancy of the flue gas damper, effective savings are therefore quickly achieved.
As a result of the low fuel consumption, the flue gas damper also reduces emissions, which for many is reason enough to decide to install this component.
Key data of motor-driven flue gas dampers
- Opening from 40°C
- Fully open from 70°C or 90°C
- Flow resistance <2Pa
- Dampers operating independently of each other
- Corrosion-resistant
- Robust construction
- Insensitive to soiling
- Maintenance-free (inspection by chimney sweeper)
- Energy saving
- Reduction of standstill losses
- Prevents heated air from escaping from the room
- Prevents the heat stored in the stove from escaping
- Improvement of the building energy balance
- Avoidance of flue gas backflow
- Active ecology with short-term amortisation
Flue gas dampers are components that are tested and approved in accordance with DIN 3388 Part 1 for the respective suitable gas fireplaces or assemblies. Accordingly, there are various designs.
