一、既有建筑节能改造项目概述既有建筑节能改造有利于减少建筑能耗、节约能源,改善和减缓能源供需矛盾;有利于建筑物隔音、降尘、保温,降低使用费用,提高建筑室内热环境的舒适度;有利于减少温室气体排放,减轻大气污染,改善环境质量。一般来说,节能建筑主要从外墙、屋面、 I. Overview of Existing Building Energy-saving Renovation Project Overview The existing building energy-saving renovation is conducive to reducing building energy consumption, saving energy, improving and easing the contradiction between supply and demand of energy; is conducive to noise insulation, dust reduction, heat preservation, and lowering the use cost of buildings, and improving the indoor thermal environment of the building Comfort; help reduce greenhouse gas emissions, reduce air pollution and improve the quality of the environment. In general, energy-efficient buildings mainly from the external walls, roofing,