Midi Compact - District heating substation for multi-family houses


Midi Compact is a complete, ready-to-install district heating substation for heating and hot water. Midi Compact is available in four sizes and is designed for buildings that have a primary connection to a district heating network. The sizes offered are 75, 100, 150 and 200 kW heating, with matching hot water output.

Alfa Laval has years of experience in district heating technology and has developed Midi Compact with well-planned pipework and with all components easily accessible for inspection and future servicing.


Installation is easy due to well planned pipework and pre-wiring.In addition, there is a pre-programmed controller and plug and-socked connection, which makes it easy to start the substation without delay. With its small size and light weight, the Midi Compact is easy to install and maintain in both new and renovated buildings.

Long-term security

All of the plates and pipes in the heat exchanger are made of acid-resistant stainless steel for long life. All components are adjusted together and undergo thorough functional testing in accordance with Alfa Laval’s ISO 9001:2008 quality assurance system. All components are easily accessible and can be individually replaced in order to facilitate future servicing.

Midi Compact is CE-marked to certify that the substation conforms to international safety regulations. To maintain the validity of the CE marking, only identical replacement parts may be used.

Complete installation package - tap water and space heating available in four sizes.

Optimized price/performance, Alfa Laval world class technology heat exchangers.

Optimized parameter settings on the control loops and 2-step for lowest return temperature and best control


Short delivery time, shipment from warehouse - easy to install, just plug-and-play.

Extremely small footprint, optimized compact design and low weight with good accessibility for service and maintenance.

Best performance for longterm use - stainless steel piping.

Reduces the use of energy - individual measuring of energy available.

District heating substation for multi-family houses (10-50 dwellings)

Date of release