An indirect substation is used when district heating network conditions, such as pressure and temperature, do not allow direct connection. When a substation is connected indirectly, a heat exchanger provides energy-efficient heat transfer. It also ensures that the primary network supply side and the secondary building installation side remain safely separated.
In this way, the building application works regardless of pressure or temperature variations in the district heating network (hydronic balancing) and is safe from pipe breaks or leaks.
Danfoss indirect substations are self-contained units that are generally wall-mounted. They can support single or multiple heating circuits, with or without domestic hot water production on the primary or secondary side.
These advanced solutions are also available with an electronic controller for weather compensation. This ensures easy and energy-efficient operation while simultaneously allowing central monitoring and energy consumption transparency.
Features and benefits
Advanced solutions available also with an electronic controller for weather compensation
Indirect substations with Micro Plate™ heat exchangers provide energy efficient heat transfer
District Heating Substations operating guide
Use this document for planning indirect heating / cooling, dhw production and other water based heating systems. Can be used for DSA; DPS; DSE; DSS; DSM; and DSC product types.
Smaller, lighter, more efficient: Danfoss' compact substation DSA1 Mini
Learn how the station is installed, as well as tips and tricks for commissioning and maintenance.
Product range
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A substation for indirect heating has a heat exchanger separating the primary flow from the secondary flow. Indirect substations are recommended for PN16-networks and higher pressure classes.
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Find more technical information about DSP - Danfoss Station Pre-engineered.
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Find more technical information about DSA - Danfoss Station Advanced Compact.
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DSP stands for ‘Danfoss Substation Prefabricated’, highlighting the fact that you get a substation that is easy to install and that complies with 90% of the typical district heating network technical connection requirements. MOD@ stands for ‘modular and digital’, meaning you get a substation that’s flexible, easy to configure and works seamlessly with our digital district heating network product portfolio.
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A substation for indirect heating has a heat exchanger separating the primary flow from the secondary flow. Indirect substations are recommended for PN16-networks and higher pressure classes. Substations in this category are normally supplied with connection pipes for a domestic hot water cylinder on the primary side for the fitted constructions, and on the secondary side for the welded constructions.
Tools and apps
Heat Selector
Danfoss Heat Selector is the best-in-class online selection tool that optimizes planning process for heating application experts.