构建了一个管道系统回路，模拟家庭强制空气加热系统，以测试自然产生的颗粒物质的传输。三种常见的炉装加湿器在受控条件下运行超过90天。使用冲击器、重量采样器和光散射装置收集和评估空气样品。使用EDS XRF分析从气流中采集的样本和加湿器中的水垢。还使用X射线衍射对鳞片样品进行了分析。 冲击器和重量分析样品取自新鲜空气入口管道和炉膛出口管道。光散射装置持续监测管道中的气流，以确定加湿器运行时颗粒物是否增加。任何取样都没有证据表明颗粒物从加湿器传输到管道系统。关键词:加湿器、锅炉、空气污染、室内、细菌、颗粒物、采样、管道、暖空气加热、测试、计算、x辐射、衍射、监测、操作。 引文:研讨会，ASHRAE交易1993，第99卷，pt。1.

A ductwork loop was constructed that simulated a home, forced-air heating system to test the transmission of naturally occurring particle matter. Three common types of furnace-mount humidifiers were operated over 90-day periods under controlled conditions. Air samples were collected and evaluated using an impactor, a gravimetric sampler, and a light-scattering device. Collected samples from the airstream and scale from the humidifiers were analysed using EDS XRF. Scale samples were also analysed using X-ray diffraction. The impactor and gravimetric samples were taken from the fresh air inlet duct and the furnace outlet duct. A light-scattering device continuously monitored the airstream in the duct to determine whether there were increases in particle matter when the humidifier was operating. There was no evidence from any of the sampling that particle matter was transmitted from the humidifiers to the ductwork.KEYWORDS: humidifiers, boilers, air pollution, indoor, bacteria, particles, sampling, ducts, warm air heating, testing, calculating, x radiation, diffraction, monitoring, operations.