国防部有数千个较老的多区域单元在运行，但通常缺乏足够的资源，无法将整个系统升级到更高效的现代设计，如可变风量系统。本文介绍的一种新型控制装置改造是一种成本显著较低的替代方案，可以替代完整的系统改造，并且可以作为一种临时解决方案，在当前有限的预算范围内满足能源效率和国防部弹性要求。改造主要发生在机械室和建筑控制系统上，因此对建筑使用者的破坏性比需要在施工期间腾空建筑区域的系统更换要小。在一年的时间里，在两个不同气候区的五台空气处理机组上演示了该改造。多区类型包括常规2区- 甲板（热甲板/冷甲板）和中性甲板单元（即三层甲板）。控制操作顺序在不需要时关闭或关闭加热或冷却，根据最开放区域风门位置和通风要求调节风扇速度，并在任何区域不需要加热（或冷却）时关闭甲板加热（或冷却）盘管阀。制定了固定通风率和按需控制通风的顺序。测量的节能率为24-60%，令人印象深刻，但经济效益参差不齐，这表明需要仔细选择改造候选方案。本文介绍了改造设计、演示方法、性能分析、适用性见解和一套技术转让支持工具。引用: 2021个虚拟会议论文

The DoD has thousands of older multizone units in operation, but often lacks sufficient resources for full system upgrades to more efficient modern designs such as variable air volume systems. A novel controls retrofit, presented here, is a significantly lower cost alternative to a complete system change out and can be an interim solution to meeting energy efficiency and DoD resiliency requirements within current limited budgets. The retrofit takes place primarily in the mechanical room and on the building control system, so is less disruptive to building occupants than a system changeout that requires vacating building areas during construction. The retrofit was demonstrated on five air handling units in 2 different climate zones over a one year period. The multizone types included the conventional 2-deck (hot deck/cold deck) and a neutral deck unit (i.e. with three decks). The controls sequences of operation turn heating or cooling down or off when not needed, modulate fan speed based on both most open zone damper position and ventilation requirements, and also close deck heating (or cooling) coil valves when no heating (or cooling) is called for by any zone. Sequences for both a fixed ventilation rate and for demand controlled ventilation were developed. The measured energy savings were impressive at 24-60%, but economic performance is mixed which indicates careful selection of retrofit candidates is required. This paper describes the retrofit design, demonstration methodology, performance analysis, applicability insights, and a suite of technology transfer support tools.