Combustion air supply: DVGW-TRGI
Room air-dependent fireplaces, wood-burning stoves and gas hot water heaters require an adequate supply of air from the living space. For that purpose, fresh air needs to be able to enter the room from outside. The incoming air ensures adequate combustion (prevents the formation of carbon monoxide) and also ensures the eduction of exhaust gases by avoiding a critical vacuum in the room in which the device is installed. An adequate combustion air supply is therefore required by law. The volume of combustion air required was so far described in the German standard firing regulation (MFeuV) and its underlying technical regulations. In the future, the MFeuV does not state the combustion air volume required and the possibilities of air supply into the inside of a flat anymore. The calculational evidences are described now in the respective technical regulations exclusively. To be specific: for gas hot water heaters it is the DVGW-TRGI (technical regulations for gas installations) and for fireplaces and wood-burning stoves it is the TR-OL (technical regulation of the stove and air heating trade) as well as the German standard DIN 19896 (fireplaces for solid fuel – technical regulation for the installation, requirements for the instruction manual).
As a result of the increasingly well-sealed building shells, the combustion air supply and forced ventilation for room air-dependent fireplaces are becoming a major challenge. Formerly you have been on the safe side with the 4 to 1 rule of thumb, but nowadays the outside air flowing in through leakages does often no longer ensure a sufficient combustion air supply for fireplaces. Unpopular measures (e.g. shortening door leaves, ventilation grilles, unattractive openings in the building shell, removing gaskets of interior doors ) are frequently the order of the day after a window replacement.
The solution of these problems are arimeo window rebate vents, which are permissible outer air transfer devices as defined by the DVGW-TRGI. The air passing value at 4 Pa is known and has been confirmed by tests at the ift Rosenheim. arimeo increases the air yield within the combustion air network, since it allows additional outside air to flow in through the building shell.
The INNOPERFORM® air flow gasket (USD) for interior doors extends the efficiency of the combustion air network, hence increases the air yield for fireplaces – tested by TÜV. More information about the air flow gasket can be reviewed on our website.