While energy consumption and atmospheric carbon emissions from most building-related servicesare falling, in the United Kingdom those associated with air conditioning (A/C) are growing as more buildings become air conditioned due to increasing occupant expectations of thermal comfort.Future projections of UK market trends suggest increased use of A/C will continue, resulting in increased national energy demand and its associated carbon emissions. This growth in carbon emissions conflicts with national commitments to reduce greenhouse gas emissions under the Kyoto Protocol and the UK government’s additional goal to reduce emissions by 60% before 2050.