Pellet heating system + correct flue
= perfect heating system
Fundamentals of flues
For selection and configuration of the flue system as well as the correct installation, locally applicable statutory regulations are to be observed. Whether renovation or new build, the correct contacts are in all cases the responsible authority or chimney sweep and the manufacturer of the flue. Heating specialists as well as flue constructors are also usually aware of the important criteria and pleased to give advice.
The function of the flue is based on a physical effect. The flue gas creates a lift compared with the ambient air. The geometrical parameters, height and diameter of the flue must therefore be matched to the volume to be transported and its temperature.
Because of its safety-relevant function in connection with domestic firing installations, certification of the flue is mandatory. Inspection and certification is carried out by the responsible authority, usually the chimney sweep.
The following types of chimney are common
- Triple-wall chimney consisting of facing brick, heat insulation and lining tube
- Double wall chimney consisting of shaft with lining tube.
- Double-walled stainless steel chimney (three-wall)
The predominantly used type is the triple-wall chimney. This construction has been used for more than 35 years. It is heat insulating and easy to install. As a result of the heat insulation, flue-gas heat is conserved and negative pressure increased. Double-wall chimneys are increasingly being used as a flue-gas conduit or where flue gases with positive pressure have to be conducted out of the house.
Heating appliances not dependent on ambient air
These are usually connected to a chimney of which the adjacent shaft is used as the air-intake shaft. The stove then takes its combustion air supply through the intake shaft of the chimney from outside. This enables airtight construction of the building. These are also known as LAS chimneys