These are items remaining in our warehouse. Although they are old models, they are unused. How about them for construction companies? They feature a high-performance ventilation system, a quiet design, and high airflow. - Model: VD-23ZXP12-C - Dimensions (mm): 300 x 572 x 475 - Airflow (m³/h): 1500 - Static Pressure (Pa): 78 - Noise Level (dB): 57 - Power Consumption (W): 100 Thank you for viewing.