Does Japan Have The World’s Least CO2-Emitting Building?
According to contractor Shimizu Corporation, the new headquarters it opened in Tokyo open this week stands as the world’s most emission-free building.
With no clear certification standard for zero-energy buildings, however, it is hard to verify the claim. What is clear is that there are a number of highly energy efficient and CO2-reducing features that are not common in traditional large buildings.One such technology is an air conditioning system that makes use of radiant heat. Water hoses run under ceiling boards like capillary vessels. By controlling the temperature of the water circulating in the hoses, the temperature of the ceiling board surface is controlled. As a result, a surface temperature of about 20 degrees absorbs the heat of people working in the office through a radiant effect. This system can reduce CO2 emissions by....