Does the server rack come with any pre-installed cooling systems, or is there a recommended setup for optimal performance?

The server rack comes with 2 built-in cooling fans with a thermostat.

Questions & Answers: Sysracks 18U 35 inch Depth Soundproof Server Rack Cabinet Quiet Server Cabinet Enclosure Silent Acoustic Server Rack up to 36% Noise Reduction

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Sysracks 18U 35 inch Depth Soundproof Server Rack Cabinet Quiet Server Cabinet Enclosure Silent Acoustic Server Rack up to 36% Noise Reduction

18U Soundproof Server Rack silent Cabinet on Wheels - Up to 36 % noise reduction - Ideal Solution For Home Office Environment - 35 inch Depth
Air Controller - LCD screen panel reporting Inside Operation Parameters of the Quite Server Rack
2 Build-in Cooling Fans with Thermostat - Fully Locking Sound proof Server Cabinet - Front and rear Heat Exhaust System - Foam Cable Entry
Flexible Return Policy and 2-year Guarantee on Server Rack Cabinet Network Enclosure
24/7 Customer Service Fast Shipping and Reasonable Price for Quality Network Rack Guarantee