Air change rate measurement for a newly renovated office with VRV system. Tracer gas (SF6) is used along with multipoint gas sampler and analyzer.

• 透过少量追踪气体（六氟化硫），配合多点气体采样及分析仪器，对使用可变换冷冻能力系统的新装修办公室作出换气量的测量。