The multifunctional indoor-outdoor environmental simulation test system is primarily used for researching the effects of indoor and outdoor environments on human comfort levels and the transmission of infectious diseases. When integrated with building environment and performance simulation wind tunnels, it can simultaneously create stable indoor and outdoor building environments, making it suitable for studying thermal-moisture coupling transfer in building envelopes within urban settings.

The chamber of the multifunctional indoor-outdoor environmental simulation test system is constructed from stainless steel and insulation material (rigid polyurethane foam), with net dimensions of 8.5 m × 5.0 m × 2.8 m. The chamber floor features a channel steel frame reinforced with stainless steel plate, supporting a load capacity of 2000 kg/m². The test system offers temperature regulation from 0 to 45°C (control accuracy ±0.3°C, uniformity ±0.5°C) and relative humidity adjustment from 30% to 95% (control accuracy ±3%, uniformity ±3%). CO₂ concentration can be adjusted from ambient levels to 3000 ppm. Fresh air supply volume ranges from 0 to 2200 m³/h, with a maximum fresh air ratio adjustable from 0 to 100%. The test system's air supply configuration can be freely switched between ceiling supply/ceiling return, floor supply/ceiling return, ceiling supply/floor return, and wall supply/wall return, with a maximum air supply volume of 8000 m³/h. Additionally, the test system achieves a filtration efficiency of ≥99.995%, controlling harmful pollutants to standard limits.