DIN EN 1749:2020-04 Classification of gas appliances according to the method of supplying combustion air and of evacuation of the combustion products (types); German version EN 1749:2020 / Note: This standard is part of the DVGW body of rules.
2020DIN EN 1749:2020-04 Classification of gas appliances according to the method of supplying combustion air and of evacuation of the combustion products (types); German version EN 1749:2020 / Note: This standard is part of the DVGW body of rules.
2020DIN EN 1749:2020 Classification of gas appliances according to the type of combustion air supply and exhaust gas removal (types)