Space heating demand
LETI Climate emergency retrofit guide, How existing homes can be adapted to meet UK climate targets, published by LETI in October 2021, defines space heating demand (SHD): The amount of energy per m2, over the course of an average year, which is needed to maintain a comfortable internal temperature. This is directly related to the thermal performance of the building and is therefore a good proxy for fabric efficiency.’
Heritage Building Retrofit Toolkit, published by the City of London Corporation in March 2024, defines space heating demand as: ‘A metric used to describing the amount of heat required to heat a building, maintaining the inside environment to a particular heating profile for a given set of weather conditions. Usually expressed in kWh/m^2/yr.’
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