heating ventilating and air conditioning 供热通风与空气调节
hepa filter 高效过滤网
high efficiency particulate air filters高效空气过滤器
horizontal series type水平串联式
hot water supply system生活热水系统
humidity 湿度
hydraulic calculation水力计算
isometric drawing轴测图
leaving air temp 出风温度 leaving water temp出水温度
mau make up air hundling unit schedule 外气空调箱
natural smoke exhausting自然排烟
net weight 净重
noise reduction消声
nominal diameter