10inch AC fans from Orion are designed specifically to move a large amount of air through confined spaces. The OA254 fans measure 254x89mm and feature airflow of 547 CFM on the standard model and up to 850 CFM on the XC model. They are designed for confined spaces including rack and panel and cabinet enclosures where they produce a significant amount of backpressure at the high CFM rating, says the company. Available in 115 and 230V AC versions have voltage ranges from 80 to 130V AC, and 160 to 260V AC, respectively. Rated power for the standard model is 35W and up to 75W on the XC model. Rated speed ranges from 1650 to 2700RPM. The fans feature a dual ball-bearing system, impedance and thermally protected motor, and diecast aluminum frame with a PBT, UL94V-0 plastic impeller. Maximum static pressure is 0.39inch H2O for the standard version and up to 1.14" H2O for the high performance model, with noise levels to 69dB. Operating temperature range is -20 to +80°C. The fans feature a life expectancy of 60,000 hours at 40°C.