This report brings together work that was undertaken to gather information on heat meter installation issues. The objective of the work was to quantify the effects of errors in heat meter installations on heat measurements and to identify actions that could be taken to reduce the occurrence of these errors. The work consisted of a literature review, an industry round table event and a series of laboratory tests of heat meters. The report does not provide a definitive answer on how big heat measurement errors which result from heat meter installation errors are likely to be. Instead, it provides an indication as to whether there are reasons for concern, and identifies actions that can be taken to mitigate the impact of meter installation errors.