蒸汽真空加热（VVH）技术采用热管概念来分配建筑物中的热量。热管优越的效率和可靠性也可用于常规锅炉和冷凝锅炉。今天的技术只使用热水冷凝锅炉。为了使冷凝锅炉热水系统的能效保持在90%以上，热水应在不高于100°F（37.8°C）的温度下通过冷凝段循环。或者，VVH和冷凝锅炉组合可以在宽温度区间内高效工作，而不受此类限制。与热水供暖系统相比，VVHis更健康、更舒适（辐射供暖与对流），更可靠（无活动部件），无需依赖电力，更安全（真空与高层建筑中的30-100 psig[0.207-0.69MPa]压力相比），不会因泄漏而造成损坏，冬天可以停止，不会出现冻结管道问题，在较宽的温度区间内运行，并允许对热量分布进行更精确的控制。 安装成本比较也有利于VVH:对于新安装，预计节省40%，对于蒸汽加热系统的改造，由于更容易安装管道和回收现有锅炉，最多可以节省70%。引文:ASHRAE交易——第120卷第2部分，华盛顿州西雅图

The vapor vacuum-heating (VVH) technology employs the heat pipe concept for heat distribution in buildings. Heat pipes’ superior efficiency and reliability can be utilized with regular and condensing boilers as well. Today’s technology employs only hot-water condensing boilers. In order to keep energy efficiency above 90% in a hotwater system with a condensing boiler, hot water should be circulated through the condensing section at a temperature not higher then 100°F (37.8°C). Alternatively, a VVH and condensing boiler combo can work efficiently in a broad temperature interval without such limitations. Compared to a hot-water heating system,VVHis healthier and more comfortable (radiant heating versus convection), more reliable (no moving parts), dependsless on electricity, is safer (vacuum versus 30-100 psig [0.207-0.69MPa] pressure in high-rise buildings), produce no damage from leaks, can be stopped in winter without frozen pipe problems, operates in a broad interval of temperatures, and allows more granular control of the heat distribution. Installation cost comparison is also in favor of VVH: for new installations 40% in savings is estimated and for the retrofit of steam-heating systems, up to 70% in savings can be achieved due to easier plumbing and salvaging of an existing boiler.