Low-Temperature District Heating Implementation Guidebook. This guidebook was written between
2018 and 2021 by seventeen authors within the IEA DHC CHP TS2 annex. The input came from 250+
literature references and 165 inspiration initiatives to obtain lower temperatures in buildings
and heat distribution networks. The author group wrote 40 internal documents about early
implementations of low-temperature district heating. Fifteen of these early implementations are
presented in this guidebook. The guidebook contains aggregated information about the main
economic drivers for low-temperature district heating how to obtain lower temperatures in
heating systems inside existing and new buildings and how to obtain lower temperatures in
existing and new heat distribution networks. An applied study of a campus system in Darmstadt
shows the possibility of reducing temperatures in an existing heat distribution network with
rather high temperatures. The competitiveness of low-temperature district heating is explored
by analysing business models and heat distribution costs. Early adopters of low-temperature
district heating are presented by examples and by identified transition strategies. Five groups
of network configurations with fourteen variants are presented to be used for low-temperature
district heating. Finally all 165 identified inspiration initiatives and all 137 locations
mentioned are listed.
