The LECaVIR project explored the prospects for reducing energy demand for residential air conditioning through the avoidance of refrigerant based air conditioning, the advancement of technological developments and the delivery of new design guidance. The research evaluated the potential of natural ventilation (NV) and low energy cooling, combined with the judicious use of air conditioning within an overall, digitally controlled mixed-mode (MM) strategy for the hottest and most humid locations. Whilst Indian cities are the focus, many of the strategies developed will be applicable globally in ODA countries with similar climatic conditions, notably China, Brazil, South America and South-East Asia.
This design guide is a product of the LECaVIR research project and is divided into two parts: Part A presents the LECaVIR concepts and provides a background to thermal comfort and natural ventilation within the context of Indian residences. The intention of Part A is to equip practitioners, designers and operators with all the information required to specify LECaVIR and undertaken initial concept design work. Part B provides further details on how to undertake appropriate sizing for a LECaVIR system, and how to develop an appropriate control strategy for mixed mode ventilation.