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When using a LLH do I need a Spirovent or Wye strainer?
Currently installing a Vitodens 200 in a Cape with 3 zones (copper to runtal, black pipe to convectors) using Grunfoss alpha with zone valves. Should a spirovent and wye strainer be a required part of the system layout or is it a duplication of function since Viessmann requires the use of a Low Loss Header which seems to have similar functionality? I'm looking for the best possible system layout without redundancy or added costs.