30. 供暖、通风和空调系统的建筑费用。鉴于拉加经委会现有供暖、通风和空调系统的状况和缺乏设备供应商，将需要进口项目的主要供暖、通风和空调设备，造成与采购、制造和进口所需的长前导时间有关的进度风险。造价可能因时间和市场状况而异。此外还需要设计室内布局，并使其与供暖、通风和空调系统的设计密切协调。缓解这一风险的措施包括：加快和优先进行有关供暖、通风和空调系统的设计、规格设定和采购活动，以解决采购和进口主要设备需要较长前导时间的风险；及确定关键的室内布局要素，以便在处理对其他设备的需要之前启动供暖、通风和空调系统的设计和采购工作。
30. HVAC building costs. Owing to the existing HVAC systems at ECLAC and the shortage of equipment suppliers, the major HVAC equipment for the project will need to be imported, resulting in scheduling risks related to long lead times for procurement, manufacturing and importation. Pricing may vary based upon timing and market conditions. The interior layout will also need to be developed and closely coordinated with the HVAC design. A mitigating measure for this risk would be to accelerate and prioritize the HVAC design, specifications and procurement activities to address the risk of the long lead time for procuring and importing major equipment and to define the critical interior layout elements to allow for the HVAC design and procurement work to proceed in advance of addressing the needs for other equipment.