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DIN 1946-6 - Ventilation of apartments according to the ventilation concept

With today’s energy-saving construction methods, building envelopes are so tight that sufficient air exchange cannot be guaranteed with just one window ventilation. This means that moisture damage, mold growth and the accumulation of pollutants in the room air can occur more easily than they did years ago. For this reason, various regulations (standards for ventilation systems) require not only a tight building envelope but also a minimum air exchange.

Bestimmungen zur Luftwechselrate nach DIN 1946-6

With today’s energy-saving construction methods, building envelopes are so tight that sufficient air exchange cannot be guaranteed with just one window ventilation. This means that moisture damage, mold growth and the accumulation of pollutants in the room air can occur more easily than they did years ago. For this reason, various regulations (standards for ventilation systems) require not only a tight building envelope but also a minimum air exchange.

Normen für Lüftungsanlagen: Lüftungskonzept nach DIN 1946-6

The planning and design criteria are intended to ensure that living spaces are supplied with a sufficiently large volume flow of outside air. If the occupancy is planned, this is necessary for the residents for reasons of hygiene and health. The requirements apply both to the entire usage unit and to each individual room.

The ventilation conceptaccording to DIN 1946-6

The requirement of a ventilation concept according to DIN 1946-6 is intended to clarify fundamental questions about the ventilation of a building or a usage unit. Changes to the building envelope result in changes to the ventilation of the rooms in this building, which is why a standardized ventilation concept must be drawn up for every new building as well as for extensive renovations of old buildings. In the case of old buildings, a ventilation concept is necessary if more than 1/3 of the existing windows in single and multi-family houses are replaced or more than 1/3 of the roof area in single-family houses is re-sealed. The planner or processor must determine how the necessary air exchange can take place from the point of view of hygiene and building protection. Please do not hesitate to contact us about the ventilation concept for a single-family home.

The procedure takes place in two steps:

Ventilation concept

Determination of whether ventilation measures are necessary for the building

Ventilation planning

Suitability of the ventilation systems to implement the necessary measures & selection of a ventilation system

The ventilation levelsaccording to DIN 1946-6

DIN 1946-6 requires proof of four ventilation levels for sufficient air exchange under different conditions of use. These were determined based on experience and studies on buildings. The four ventilation levels are based on characteristic user behaviors. According to the standard, four ventilation levels are initially distinguished in terms of their intensity. The different ventilation levels classify the performance of a ventilation system. If the air supply via building leaks is insufficient to ensure ventilation for moisture protection, the planner must provide ventilation measures.

Find out more about the ventilation levels in our guide: “Why ventilate?”

4 Air exchange rate after …

Air exchange rate after ...

Based on the DIN 1946-6 standard and the requirements of EnEV and the funding programs, inVENTer offers a calculation tool for the professional design of the ventilation system and is happy to support you with the calculation by a competent service team. Contact us for free advice.

Conclusionon the subject of DIN 1946-6

With today’s energy-saving construction methods, building envelopes are so tight that sufficient air exchange cannot be guaranteed with normal ventilation behavior. DIN 1946-6 shows possible solutions for achieving a sufficient exchange of air in apartments. However, this standard contains open and partly contradicting passages. For this reason, the design should only be based on the 1946-6 standard. Too tight planning and interpretation of the standard can often lead to uneconomical solutions. InVENTer’s ventilation planning is carried out according to recognized regulations, namely according to EnEV, according to KfW funding conditions, both according to customer requirements and on the basis of DIN 1946-6 and DIN 4701-10.

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