I'm trying to figure the true number of BTU's that a 3750E-48PD-F puts out. Cisco lists in two separate documents that the max BTU/hr for this device is 3939 (http://www.cisco.com/en/US/products/ps7077/products_data_sheet0900aecd805bbe67.html) and 3924 (http://www.cisco.com/en/US/products/ps7077/prod_models_comparison.html).
However, a note found in documentation referencing an 8700W power supply for a 6500 series switch states, "Note: ~90% of PoE power is dissipated at the PoE device and along the cabling and not at the switch closet itself. Plan for cooling capacity for the switch closet accordingly". (http://www.cisco.com/en/US/products/hw/switches/ps708/products_data_sheet0900aecd8059a1ef.html)
If the note on the power supply is correct, then I believe that Cisco's posting of 3939 and/or 3924 BTU/hr is very misleading.
How should the maximum BTU/hr for a 3750E-48PD-F (or any other PoE switch) be figured? Using Cisco's listed maximum BTU/hr or by following the note that states approximately 90% of the power (heat) will be dissipated at the far end?