CIBSE Technical Symposium, London, UK 12-13 April 2018 Page 1 of 13 Overcoming Practical Challenges and Implementing Low-Carbon Heat in the UK: Lessons from the Balanced Energy Network (BEN) at LSBU MUHAMMAD ARIF, AARON GILLICH, ANDY FORD, YANG WANG London South Bank University, Abstract The challenge of decarbonisation of UK heating energy by 2050, highlights the need for efficient electric heating and a dramatic increase in the rollout of heat networks. Many studies consider low-carbon heat at a theoretical level, however there is a gap in understanding the implementation challenges, particularly for existing stock. The paper presents the integration of electrified heat into existing building distribution systems and demonstrates how a Balanced Energy Network BEN system can assist in overcoming practical challenges to achieve to retrofit low carbon heat to existing building distribution systems. The BEN system delivers a low-carbon, efficient and sustainable energy solution. It is analysed and evaluated as a concept through to becoming a live project. Key implementation challenges and learning outcomes are discussed. Keywords Balanced Energy Network, Heat Pump, Cold Water Heat Network, Heat Exchanger, Demand Side Response 1.0 Introduction In order to meet the UK’s obligation of reducing emissions by at least 80% by 2050 compared to 1990 levels, we must overhaul nearly all aspects of the UK’s energy system. We must halve emissions from industry, electrify transport, and nearly eliminate carbon from electricity generation. These are staggering systemic changes, and yet the UK government states that these will be easier than addressing heat: “Decarbonising heat is the UK’s most difficult policy and technology challenge in meeting our carbon targets” (BEIS, 2017). There are a number of studies and scenarios exploring the options for decarbonised heat. All of them require a dramatic uptake of both heat pumps and heat networks, and in particular retrofitting them to the existing stock. Very few have explored the practical onsite challenges of doing this. This paper addresses this gap with a detailed exploration of the Balanced Energy Network (BEN) case study at London South Bank University. It considers the information and site challenges of interfacing with existing systems and retrofitting low carbon heat to occupied buildings in densely occupied central London. The paper is organised as follows. Firstly, the theoretical context for low carbon heat is given. The BEN project is described in overview. The qualitative research methods are described, outlining the data gathered through site surveys and semi- structured interviews with the project team. From this, lessons are distilled on the information challenges likely to face future projects. The paper closes by linking these findings to the theoretical and policy context for low carbon heat.