Power consumption in the building thermal load could be the sum of the building fabric conduction load, building ventilation convection load and other such as radiation loss load. Dynamic Breathing Building (DBB) is the state-of-the-art to improve the wall insulation and indoor air quality (IAQ) performance as making air flow through the wall. This heat recovery type DBB contributes the power consumption saving due to the improved dynamic U-value. The key principle comes from the nano scaled breathing wall technique and thus could apply to the real building to improve the energy and health performance toward a future low carbon green building. KIER (Korea Institute of Energy Research) twin test cell with static insulation (SI) and dynamic insulation (DI) at KIER was developed to test building power consumption at the real outside conditions. Then, the actual results were compared with the theory to predict the power consumption at the KIER twin test cell and introduced the building new radiation loss factor α to explain the difference between the both the theory and the actual case. Filtration performance was also evaluated about breathing DI wall building. The energy performance results indicated that the power consumption at the breathing DI wall building could be saved 10.8% at the 2ACH compared with conventional insulation. The building radiation loss factor α for this test condition to calibrate the actual test was 0.55 in the test condition. And the filtration performance test indicated that the breathing DI wall building at the 0.7ACH could reduce the dust particles by 80%.