Direct heating systems

  • Overview
  • Product range
  • Documents
  • Tools and apps
  • Case stories

Conventional heating systems in single-family houses and apartment buildings consist of a central heat source and central DHW production. Today, renovated or new buildings are obliged to make at least partial use of renewable energy sources. All buildings must comply with strict DHW hygiene regulations.

In nearly all cases, it makes financial sense to heat multiple apartments, buildings or houses via a central system rather than individually. Modern central heating systems can use buffer tanks to combine different energy sources.

Buildings with decentralized DHW production need only three rather than the usual five supply lines to provide hygienically safe drinking water. If the volume of water held between the water heater and the taps is less than 3 liters, no regular hygienic testing is required.

Each building and apartment has a directly connected substation or flat station with integrated production of domestic hot water. Single or multiple heating circuits (e.g. radiator, floor heating system) are supplied with heated water from the central heat source.

Features and benefits

Domestic hot water is produced on demand, without storing

Heating systems can combine different energy sources

Product range

  • if (isSmallPicture) { DSP MOD@ substation; } else if (isBigColumns) { DSP MOD@ substation } else { DSP MOD@ substation }
    DSP MOD@ substation

    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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    Indirect or direct heating and domestic hot water cylinder

    Substations for indirect heating have a heat exchanger separating the primary flow from the secondary flow. Indirect substations are recommended for PN16 networks and higher pressure classes. Substations for direct heating have no heat exchanger separating the primary flow from the secondary flow and are recommended for maximum PN10 or PN6 networks. The domestic hot water is heated in a cylinder by the district heating water flow in a coil within the cylinder.

  • if (isSmallPicture) { ; } else if (isBigColumns) { } else { }
    Direct heating with mixing loop and domestic hot water

    Substations for direct heating have no heat exchanger separating the primary flow from the secondary flow. Therefore the supply from the network or the central oil-/gas boiler will flow directly into the network in each flat. Direct substations are recommended for maximum PN10 or PN6 networks.

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    Direct heating and domestic hot water

    Substations for direct heating have no heat exchanger separating the primary flow from the secondary flow. Therefore the supply from the network or the central oil-/gas boiler will flow directly into the network in each flat. Direct substations are recommended for maximum PN10 or PN6 networks.

Documents

Documents
Type Name Language Valid for Updated Download File type
Brochure Specifying the right district heating substation makes commercial sense Slovenian Slovenia 21 Jul, 2015 5.2 MB .pdf
Brochure Specifying the right district heating substation makes commercial sense Slovak Slovakia 21 Jul, 2015 2.4 MB .pdf
Brochure Specifying the right district heating substation makes commercial sense English Multiple 05 Mar, 2015 2.4 MB .pdf
Brochure Specifying the right district heating substation makes commercial sense German Multiple 16 Mar, 2020 3.1 MB .pdf
Brochure Specifying the right district heating substation makes commercial sense Romanian, Moldavian, Moldovan Romania 29 Aug, 2015 2.3 MB .pdf
Brochure Specifying the right district heating substation makes commercial sense Croatian Croatia 06 Aug, 2015 2.5 MB .pdf
Brochure Specifying the right district heating substation makes commercial sense Ukrainian Ukraine 18 Sep, 2015 2.2 MB .pdf
Brochure Specifying the right district heating substation makes commercial sense Bulgarian Bulgaria 31 Jul, 2015 11.3 MB .pdf

Tools and apps

Case stories

  • if (isSmallPicture) { Eurasburg; } else if (isBigColumns) { Eurasburg } else { Eurasburg }
    Successful transition from oil boilers to a local heating network in Eurasburg

    In the Wittelsbacher Land near Augsburg the local network in Eurasburg supplies heat to 80 buildings using a wood chip heating system. Danfoss’ substations ensure efficient heating in all building types, and its modern SCADA solution enables remote system monitoring and management. 

  • if (isSmallPicture) { Rothes CoRDe plant; } else if (isBigColumns) { Rothes CoRDe plant } else { Rothes CoRDe plant }
    DrivePro® Lifecycle Services secure maximum uptime for Rothes CoRDe

    SCOTLAND: The Rothes CoRDe plant, a biomass-fired combined heat and power (CHP) plant, ensured maximum uptime thanks to several DrivePro® Lifecycle Services.

  • if (isSmallPicture) { Pipe tracing in 600 Suzhou apartments China; } else if (isBigColumns) { Pipe tracing in 600 Suzhou apartments China } else { Pipe tracing in 600 Suzhou apartments China }
    Pipe tracing in 600 Suzhou apartments China

    Suzhou city was founded in 500 BC. is nowadays a major city located in the south-eastern Jiangsu Province of East China, about 100 km (62 mi) northwest of Shanghai. It is a big economic center and local point of trade and commerce, and the second largest city in the province, after its capital Nanjing.

  • if (isSmallPicture) { Saleska valley, Slovenia; } else if (isBigColumns) { Saleska valley, Slovenia } else { Saleska valley, Slovenia }
    Improved hydronic balancing of the district heating network in Slovenia

    The Saleska Valley district heating network is the second largest network in Slovenia, dating back to 1959. Since then, the demands have changed significantly and have challenged the hydronic balancing of the system which was optimized with new intelligent controllers Virtus.

  • if (isSmallPicture) { In Helsinki a total of 667 addresses in a mix of large and small buildings and apartments have had the Leanheat software installed.; } else if (isBigColumns) { In Helsinki a total of 667 addresses in a mix of large and small buildings and apartments have had the Leanheat software installed. } else { In Helsinki a total of 667 addresses in a mix of large and small buildings and apartments have had the Leanheat software installed. }
    Leanheat makes buildings smart

    In Europe, 30 percent of all energy consumption goes to heat or cool buildings. Danfoss has the solution to lower energy usage and improve indoor climate by adding a digital element: Leanheat software.

  • if (isSmallPicture) { Consumption with SONDEX evaporators; } else if (isBigColumns) { Consumption with SONDEX evaporators } else { Consumption with SONDEX evaporators }
    SONDEX® raises the standard in Brazil

    Since its launch in 2016, the SONDEX® branch of Danfoss Brasil has worked hard to become the leading manufacturer of plate heat exchangers for customers across Latin America. In December 2017, the company took giant strides towards fulfilling its high ambitions when it delivered four evaporators to Bioenergética Aroeira for use in the production of sugarcane ethanol – the biggest delivery of its kind ever manufactured in Latin America.