Abstract
Households in Japan need to save electric power to accomplish the goal of reducing GHG emission and cope with the current shortage of power supply. The existing condominiums, with households more than 5 million (10% of all the households), have problems in maintenance and especially in energy saving compared with newly constructed houses.
The author sent questionnaires to executives of condominium unions to determine the obstacles against promotion of Eco-renovation which is expected to prolong life of buildings, prevent condensation, and have synergy effects of insulation and power saving.
The results indicate that differences appeared between the ages and scales of the buildings, and the sources of information available to the executives of the condominium unions. Based on the results, the author proposes practical solutions to promotion of Eco-Renovation for condominiums according to their age and scale.
