The things are completely outlawed here in the UK. There's not that
many places here need the vast AC plants these things serve due to our
climate. I remember they were associated with "Trane", (an American
company). compressors/evaporators/condensers, all water/gas heat
exchangers. They had an unsual method of load reduction by unloading
pistons on the compressors. They were pretty reliable, never went
wrong. But out they all went & conventional plant put in. It was a
The cooling towers on the roof had all timber slats.
Legionnaires disease is endemic (ie everywhere) It very quickly
appears in condensate for air coolers. Coolers are NOT
airconditioning as they do not control humidity (a difficult and
In days of yore some proper airconditioning plants recirculated water
from a tank (mains water fed) using spinning disk humidifiers.
Guaranteed to promote Legionnaires disease. Humdifiers these days
often use steam or ultrasonic misters.
The problem is that there is no way of totally removing/killing all
bacteria. As the chlorine dissipates from the water in your heater
over the weeks the odd few bugs in there will multiply, possibly to a
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