20 7/8' D X 8 1/8' H Optimized for thermal management of DVRs and other digital equipment Wall mounts vertically or horizontally, can also be used as a monitoring shelf Extensive cable management tie points, EKOs and cable pass-throughs Interlocking top for added security; top removes easily for servicing Standard keylocked vented hinging front door Includes cooling fan and washable filter Optional proportional speed thermostatic fan control