Hello again ellelol

Since our servers are customizable there is not a single answer to your question. To find out the BTU, wattage, and other power and heat usage/output you will need to use our datacenter planner. Choose and 1850 in the list of servers and configure it to match your system. That will be the best approximation.

http://www.dell.com/html/us/products/rack_advisor_new/index.html

Thanks