This paper describes the development of a model which can be used to explore the technical feasibility and policy implications of attempting to achieve 60 - 90% reductions in the C02 emissions from the UK housing stock by the middle of the next century. Reductions of this order are likely to be required across the industrialised countries in order to stabilise the atmospheric C02 concentration and global climate. In order to be able to investigate this problem, a highly disaggregated physically based energy and carbon dioxide model of the UK housing stock has been developed.

In response to an increased awareness of the impact of building related energy consumption on emissions of carbon dioxide, attention has turned to the task of making buildings more energy efficient. Although this is a key element in the design of a new building, it is important also that the occupants' expectations of a comfortable and healthy environment are met. Computer simulations of the airflow and thermal environment within a naturally ventilated building have been made using a finite volume CFD model.

A major concern of those wishing to limit the energy use in buildings is the growing trend towards installing air-conditioning in new and refurbished  buildings. The Airlit - PV project has taken this challenge and has designed a novel fa9ade unit incorporating the latest thinking in solar control, natural ventilation, daylighting and photovoltaic power. By careful design and intelligent control the goal is to reduce the impact of solar and internal gains to such an extent that mechanical cooling is not required to maintain comfort conditions.

This paper describes the current government activities relating to Photovoltaics in buildings as implemented in tbe DTI New and Renewable Energy Progranune. To set the context the paper starts with a brief review of the overall prospects for renewable energy in global, European and UK contexts. This is based on work previously undertaken for the DTI1. For comparison, the current state of deployment of renewable energy in the UK is reviewed. This then leads into a brief description of the UK government's programme on new and renewable energy.

BSRIA are currently conducting a research project aimed at promoting identification and amelioration of plant oversizing, with particular emphasis on providing assessment of potential energy savings achievable through the application of remedial measures. The objective of the project is to update existing BSRIA guidance, which will provide building operators with information on how to identify excess HV AC plant capacity and how to enhance the performance of such plant.

This paper summarises the planned redevelopment of Webber's Yard industrial estate on Dartington Estate in Devon. It discusses the needs of different stakeholders involved in the project and outlines how the design team responded. It argues that this approach to building design and development is particularly sustainable and could be used as a model for the development of other light industrial estates.

Over the last 15 years, active desiccant systems have become a common component of HVAC systems in commercial buildings needing lower-than-usual humidity levels. Ice arenas, supermarkets and refrigerated warehouses all contain refrigeration systems which cool air more effectively when most of the building's moisture load is removed by an active (heat-reactivated) desiccant system.