I’m planing to build a render farm for myself and just find the render farm company in the UK . Here is some data from the website: https://www.modularcreation.com

"Six nodes with i7-4770 CPU

Idle noise: ~46-48 dB
Idle consumption: ~ 150 Wh
CPU's temperatures: ~ 25-30 °C

100% load noise : ~48-50 dB
100% load (rendering) consumption : ~ 650 Wh
100% load (rendering) CPU temperatures : ~ 65-70°C"

It doesn't look like a noisy system. They are selling cases too.