Energy saving by airtight, thermally insulated house and air conditioning system

摘要

Home energy consumption in Japan has been increasing rapidly for these years. Ener- gy consumption per house increased 1.5 times for 20 years. Considering that Japan im- prots most of energy resources from abroad, energy saving as well as paying attention to global environment is most important issue now for Japanese. Recently, airtight and thermally insulated houses are widely spreading from the stand point of both amenity and energy saving.