23 September 2011
Buildings and houses consume about 40% of global energy consumption. In order
to achieve the stable level as called by IPCC, it is also reported by WBCSD (World Business
Council for Sustainable Development) that carbon dioxide arising from the energy required
by the buildings needs to be reduced by 77%. For that reason, the introduction of highefficiency air-conditioning systems is extremely important. In Japan, astonishing progress is
being made in the development of heat pump technology, which uses the heat in the air as a
heat source. This writing aims to consider the possible role of air source heat pumps by
examining the status of energy consumption by buildings in various countries.