Re: Importance of proper Air Con

In article <3130303030373135488C7B8022@xxxxxxxxxxxxxxx>, Nospam wrote:
Ventilation in broadcasting sites was always very poorly engineered in
the past (it might be a little better now). It was quite common to have
two Ventaxia over a door very loudly blowing in air but very limited
outlets so there was no air flow. The flaps on the outlet vents were
often seized up. Another common design feature was to put the fans over
the door so when the door was open the cold air went straight out below
and the room got hotter.

Yes, and it might also be something of a leap of faith to assume that the
ventilation within the equipment itself was properly designed. I can still
remember our first encounter with the new (sometime in the 1970s) BBC
designed vision mixer, which for the first time had everything on huge
*horizontal* circuit boards. Then there's the standard PC power supply
which sucks air *out* of the equipment, effectively using the DVD drives
and the CPU heatsink as air filters so they clog up with fluff. There are
of course innumerable examples of charred circuit boards around heatsinks
that are just too small because nobody has done the sums, or perhaps
because the designers got at it afterwards and thought the whole thing
would look neater in a smaller box.

Rod.
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