Major heating problems in your data center. I have great need of cold air, that's why I bought the largest hollow drill, I could buy at www.aliexpress.com in China.
without making a whole Unboxing, review of diamond drill,, I will reveal is that it works,, and exceeded all expectations!!
160mm Marble Hole Saw Diamond Core Drill Bit Diamond Hole Saw - http://amzn.to/2BSFs7E
My PlayHouse is a channel where i will show, what i am working on. I have this house, it is 168 Square Meters / 1808.3ft² and it is full, of half-finished projects.
I love working with heating, insulation, green power, alternative energy, solar, wind and more. It all costs, but I'm trying to get the most out of my money, and my time.