Hot air chimneys help remove hot exhaust from servers more efficiently by reducing and mixing with chilled air. This capability and simple technology makes the chimney approach an attractive and cost effective option to offer effective cooling solutions. Electron Metal offers passive and fan powered chimney solutions and can also offer retrofit solutions for existing cabinets in some cases. All of Electron Metal’s Series 4000 cabinets come standard with tops with chimney cut outs, to enable chimneys to be deployed immediately, or added if heat loads increase. We also offer active chimneys designed to handle excessive heat loads that exceed a passive system’s capabilities.