The design goal is best performance with a SINGLE silent fan... as efficient as possible. A single fan'd rad running in silence that can match a dual fan'd rad in silence is obviously more efficient. Read the whole thread as am sure your questions are already answered. This is all about efficiency, performance and silence. Designed for the job from the start.
Cathar will be able to answer more appropriately. The specs of this job are his baby... I just realise them...
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