Hi vvilms, congratulations on having the good sense to be actively considering this important aspect of equipment health.
As you may be aware, generally the most common causes of electronic equipment failure are due to repeated switching on and off and excessive heat.
Many people think that heat rises, it doesn’t. Whilst hot air does rise, heat (and in particular, heat in racks) tends to be highly localised, hence the use of heat sinks.
Not being privy to your specific situation and layout, I merely share what I have done, which is to use a strong, open rack, with a complete unit’s space above, below and between each of the four units that form the main audio processor, preamps and multi-power supply, which switches everything on.
For decades I have built my own computers for music production and general use (fourteen machines, normally four large hard drives in each, partitioned in two halves) and in that time only had three hardware failures (three drives that eventually reached a natural end. (Mean Time Before Failure). No problem as files were backed up in three separate places.
I regard this good reliability as the reward of great diligence in regard to each singular component chosen, with zero weak links throughout, and very careful consideration regarding cooling air flow throughout.
So, believe that if, as you seem to be doing, you follow a similar philosophy, with careful attention to detail; doing all you reasonably can to alleviate heat, you will reap a similar reward in extending the life of your equipment.
I have a number of these to finish the look of the rack. Their quality belies their extremely modest price point.
https://www.studiospares.com/accessorie … 460170.htm
My Music Computers have all been numbered, CoolMusic 1 etc.
Their titles reflect a perspicuously objective reality.
In the musical world, you need to be “cool”. 