Lux in tenebris
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No, that's not the right way to do it. A closed case ensures airflow inside the system unit, which results in more efficient cooling. When the case is open, this airflow is disrupted, and the fans that are designed to exhaust and intake air (if there are any) end up working in vain. Moreover, the air temperature is still high in the summer, no matter what. So, removing the case can only be detrimental. I myself used to keep the case open out of ignorance, and when it was time to upgrade my computer, I faced criticism about this. I also looked at the opinions of experts online.
And one more thing. I don't know what experts you were looking at.) Probably *American*.This is according to their supposedly good standards; thoughtless guys assemble system units in Russia *Intake = Exhaust*).
On our military equipment, everything has always worked only with *Intake*. For example, *RZC*, control units = only intake, with strong airflow. Exhaust is useless. This has been verified by everyone who thinks. Simple children's physics. I only use intake, and I've been doing it for a long time, for all ordinary users. And dust still accumulates anyway. And cleaning the dust is necessary, at least once every 2 months. This is according to our standards.
Евангелие от Иоанна, 1.5: Lux in tenebris lucet, et tenebrae eam non comprehenderunt. Свет во тьме светит, и тьма не объяла его.