Hi I apologize if I posted in wrong category . I would like some recommendations for a cooling system for a small closed A/V cabinet. The cabinet will contain Lync6 system by HTD , Directv H25 , Netgear router and HTDNet . It will be shelf mounted per customer preference . I would like to use a intake/exhaust fan . However the customer is not crazy about cutting holes in his cabinet . I have looked into several options . I would rather have opinions from other A/V techs. The cabinet is 23" W x 30" D x 26" H . Thanks in advance.