个节能组件询问了几个专家的意见，以确定效能、成本和市场供应情况。38. 项目小组分析了几栋净零大楼，以了解其节能方案、建筑概念、投资费用和使用的技术。
38. Several net zero buildings have been analysed by the project team to review their energy efficiency solutions, architectural concepts, investment costs and use of technology.