DIN Standards Committee Heating and Ventilation Technology and their Safety
Hydraulic balancing of heating, cooling and ventilation systems – Part 3: Procedure for existing heating systems in residential buildings
Abstract
This document describes the procedure and process for carrying out hydraulic balancing of existing heating, cooling and ventilation systems in existing residential buildings or buildings of similar use. Buildings with similar use are, for example, office buildings, hotels, homes, smaller residential and commercial buildings or small sales areas, equipped with radiators or underfloor heating. Surface heating systems on walls or ceilings are not explicitly considered, but the methods described below can be used analogously for their balancing. The scope of application does not include, for example, buildings with ventilation systems or the thermal supply of production facilities. In principle, the procedure described in Part 1 of this standard applies. Permissible procedures are described specifically for existing buildings, which are essentially based on the determination of the heating load or consideration of the existing distribution system. In contrast to the installation of a new heating system, the procedure for which is described in Part 2 of the standard, not all of the data required for hydronic balancing is usually available for modernization and repair work on existing heating systems. This applies, for example, to information on the heat transfer coefficients of the building envelope and the installed distribution system, the main components of which are usually not accessible and require an estimate. In order to achieve an acceptable result with reasonable effort when carrying out hydronic balancing of such heating systems, permissible assumptions and estimates are described in detail below compared to the procedures specified in Part 1 of the standard.
Begin
2025-05-13
Planned document number
DIN 94679-3
Project number
04112235
