Looking at the Systemair website:
RVK 8 A1 42 DB 750 m3 / hr
RVK 8 L1 44.9 DB 950 m3 / hr
RVK 10 A1 39.7 DB 760 m3 / hr
RVK 10 L1 41.9 DB 1080 m3 / hr
Would 10" L1 not be overkill for 2x 600w though, bearing in mind I never ran my 6" A1 at more than 40-60% which would be 172-258 m3/hr.
That was with a 4 meter run of ducting between the filter and fan too, this time I should be using around 1.5 meters so should improve efficiency somewhat.
Say if adding another 600w doubles the heat, I'd require double the airflow which is 344-516 m3/hr?
Or is that the wrong way of looking at things?
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